[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fxLN3MUwXCdr5RPjwZYIDpOj8CHyjOmngWTgoKXPtZbg":3,"$fda9XejNcCPu8MxUerCQm-45_EWG1BSBzuukJjTXM7H8":36,"$f3Ft0rKFJHppdzE-vuveecxx1BUcg9iOlMLtyzf_MJDg":155,"$fucxFBm2ZjZfGSdmdRaSNGBI_F0jJme4f0GTvzUhQfL8":220},[4,8,12,16,20,24,28,32],{"title":5,"slug":6,"path":7},"About Microbeonline.com","about-microbeonline-com","\u002Fabout-microbeonline-com\u002F",{"title":9,"slug":10,"path":11},"About Me","about-me","\u002Fabout-microbeonline-com\u002Fabout-me\u002F",{"title":13,"slug":14,"path":15},"Advertise with Us","advertise-us","\u002Fadvertise-us\u002F",{"title":17,"slug":18,"path":19},"Privacy Policy","privacy-policy","\u002Fprivacy-policy\u002F",{"title":21,"slug":22,"path":23},"Abbreviations","abbreviations","\u002Fabbreviations\u002F",{"title":25,"slug":26,"path":27},"Microbes","microbes","\u002Fmicrobes\u002F",{"title":29,"slug":30,"path":31},"Books","recommended-books","\u002Frecommended-books\u002F",{"title":33,"slug":34,"path":35},"Utilization Tests for Bacterial Identification","utilization-tests","\u002Futilization-tests\u002F",{"type":37,"data":38},"blog",{"slug":39,"title":40,"description":41,"seoTitle":42,"seoDescription":43,"author":44,"createdDate":45,"lastUpdatedDate":45,"draft":46,"category":47,"image":42,"body":48,"faq":49,"commentsClosed":46,"tags":68,"related":70,"comments":151},"chain-of-infection","Chain of Infection: The Six Links and How to Break Them","\u003Cp>The chain of infection explained: infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host, with how each infection-control measure breaks a link.\u003C\u002Fp>",null,"How infection spreads from source to new host, as a six-link chain, and how handwashing, masks, vaccination, and isolation each break a specific link.","Acharya Tankeshwar","2026-08-19",false,"general-microbiology","A pathogen cannot spread on its own. To reach a new person and cause disease, it has to complete a series of steps in order: leave its source, travel by some route, get into a new host, and find that host vulnerable. Miss any one step, and the spread stops.\n\nThink of it as a relay race. The baton has to pass cleanly from one runner to the next, all the way around the track. If any runner drops the baton, the race is over. Infection control works on exactly this logic. You do not have to stop every step to prevent an infection. You only have to break the chain at any one link.\n\n\u003Cfigure>\n\u003Cimg src=\"https:\u002F\u002Fassets.microbeonline.com\u002Fblogs\u002Fchain-of-infection.gif\" alt=\"A minimalist, schematic infographic illustrating the six-step chain of infection as a circular chain of interlocking links\" width=\"543\" height=\"532\" draggable=\"false\" contenteditable=\"false\">\u003Cfigcaption>Figure: This infographic visualizes the infection process as a circular chain of six links, detailing the sequence from the infectious agent to the susceptible host.\u003C\u002Ffigcaption>\n\u003C\u002Ffigure>\n\nThis is why a single well-placed measure, washing your hands, wearing a mask, closing a window on a mosquito, can prevent disease: it drops the baton. This article walks through all six links, and, just as importantly, how each one can be broken.\n\n## The six links\n\nInfection spreads through a fixed sequence, traditionally drawn as six links in a chain:\n\n1. **Infectious agent**, the organism that causes disease.\n2. **Reservoir**, where the organism lives and multiplies.\n3. **Portal of exit**, how it leaves the reservoir.\n4. **Mode of transmission**, how it travels to a new host.\n5. **Portal of entry**, how it gets into the new host.\n6. **Susceptible host**, a person able to be infected.\n\nEach link is also a place to intervene. The rest of this article takes them one at a time.\n\n## Link 1: The infectious agent\n\nThe chain begins with the organism itself: a bacterium, virus, fungus, or parasite capable of causing disease. What matters at this link is not just which organism it is, but how good it is at causing disease and how many organisms are involved. A highly virulent organism needs only a few to establish infection; a weakly virulent one may need to arrive in very large numbers.\n\nThis is the concept of virulence and infectious dose, covered in the [pathogenesis overview](https:\u002F\u002Fmicrobeonline.com\u002Fbacterial-pathogenesis\u002F).\n\n**Breaking this link:** reduce or eliminate the organism at the source. Antibiotic or antiviral treatment of an infected person lowers the number of organisms they carry and can shed. Disinfection and sterilization remove the organism from instruments and surfaces before it can travel.\n\n## Link 2: The reservoir\n\nThe reservoir is where the agent normally lives, grows, and multiplies between hosts. There are three broad kinds.\n\n**Human reservoirs.** People with active infection are obvious reservoirs. So are **carriers**, people who harbor and shed the organism without showing signs of disease themselves. A carrier can spread an infection precisely because no one, including the carrier, realizes they are a source. *(Carrier states are covered in more detail in)*\n\n**Animal reservoirs.** Many pathogens live in animals and pass to humans, causing **zoonoses**. Rabies, brucellosis, and many others are maintained in animal populations, with humans infected on contact.\n\n**Environmental reservoirs.** Soil, water, and surfaces can harbor organisms. *Clostridium tetani* lives in soil; *Legionella* lives in water systems; many hospital pathogens persist on wet equipment.\n\n**Breaking this link:** eliminate or control the reservoir. Treating or isolating infected people, controlling or vaccinating animal reservoirs, and cleaning environmental sources such as water systems all remove the pathogen's home base.\n\n## Link 3: The portal of exit\n\nThe organism has to get out of the reservoir before it can spread. The portal of exit is the route it takes to leave, and it usually matches the site of infection.\n\nCommon portals of exit include the respiratory tract (coughing, sneezing, talking), the gastrointestinal tract (feces, vomit), blood (through wounds, needles, or biting insects), the urogenital tract (urine, sexual secretions), and the skin (open lesions, shed skin).\n\n**Breaking this link:** contain what leaves the body. Covering the mouth when coughing, wearing a mask, safely disposing of feces and contaminated waste, and covering wounds all block the exit.\n\n## Link 4: The mode of transmission\n\nThis is the heart of the chain: how the organism actually travels from the old host to the new one. Transmission is either direct or indirect.\n\n**Direct transmission** is immediate transfer from reservoir to host, with no intermediate.\n\n- **Direct contact:** touching, kissing, sexual contact. Sexually transmitted infections (gonorrhea, syphilis, chlamydia, genital herpes, HIV) spread this way.\n- **Droplet spread:** large respiratory droplets launched by coughing, sneezing, or talking. These are relatively heavy, so they travel only a short distance, roughly one to two meters, before falling. Organisms causing strep throat, diphtheria, whooping cough, and many respiratory viruses spread by droplets.\n\n**Indirect transmission** uses an intermediate to carry the organism.\n\n- **Vehicle-borne:** a contaminated inanimate object or substance, such as food, water, blood products, or medical devices. Fecal-oral transmission through contaminated food and water is the classic example, spreading organisms such as Gram-negative gut bacteria, hepatitis A and polioviruses, and protozoa such as *Entamoeba* and *Giardia*.\n- **Airborne:** very small particles (droplet nuclei, the dried residue of droplets, and aerosols) that stay suspended in the air for long periods and travel well beyond a couple of meters. This is a smaller and more dangerous category than droplet spread. The classic airborne organisms are *Mycobacterium tuberculosis*, measles virus, and the chickenpox virus.\n- **Vector-borne:** a living carrier, usually an insect, transports the organism. A mosquito carrying malaria or dengue, a tick carrying Lyme disease, or a mite carrying scrub typhus are vectors.\n\nA note worth making early, because it is the single most common point of confusion: **droplet and airborne are not the same thing.** Droplets are large, fall quickly, and reach only nearby people. Airborne particles are small, float, and reach people far away and even after the source has left the room. The distinction decides the level of protection needed, a simple surgical mask for droplets, a fitted respirator and special ventilation for true airborne organisms.\n\n**Breaking this link:** this is where most everyday infection control acts. Handwashing removes organisms from hands before they transfer. Masks block droplets. Ventilation and respirators counter airborne spread. Safe food and water handling breaks vehicle transmission. Mosquito nets, insect repellent, and vector control break vector transmission. Break this one link, and the organism never reaches the next host.\n\n## Link 5: The portal of entry\n\nHaving traveled, the organism must get into the new host. The portal of entry is the route in, and most pathogens have a preferred one. Using the wrong door often means no infection at all: an organism swallowed may be destroyed by stomach acid, while the same organism injected under the skin causes disease.\n\nThe main portals of entry are broken or intact skin (cuts, bites, punctures, surgery, needles), the respiratory tract (inhaled particles), the gastrointestinal tract (contaminated food and water), the urogenital tract (sexual contact), and the placenta (mother to fetus, called transplacental or vertical transmission).\n\nOrganisms also differ by source. **Exogenous** agents come from outside the body. **Endogenous** agents are already on or in the body, the person's own [normal flora](https:\u002F\u002Fmicrobeonline.com\u002Fnormal-flora-of-human-body\u002F), reaching a site where it does not belong.\n\n**Breaking this link:** protect the entry points. Covering wounds, aseptic technique during procedures, safe injection practices, protective equipment, and barrier contraception all close the door.\n\n## Link 6: The susceptible host\n\nThe final link is the new host. Even if the organism arrives at the right door, disease follows only if the host is susceptible, that is, unable to fully resist. Susceptibility is higher at the extremes of age (the very young and the very old), in people with weakened immunity (genetic defects, advanced HIV, immunosuppressive drugs, chemotherapy), after surgery or organ transplant, and in those with serious underlying illness such as cancer, diabetes, or liver disease. A coexisting infection also raises susceptibility.\n\nHost factors are covered in the [pathogenesis overview.](https:\u002F\u002Fmicrobeonline.com\u002Fbacterial-pathogenesis\u002F)\n\n**Breaking this link:** make the host resistant. Vaccination is the most powerful tool, preparing the immune system before exposure. Good nutrition, treatment of underlying conditions, and preventive medication in high-risk situations all strengthen the host so the organism cannot establish itself.\n\n## Breaking the chain\n\nBecause the chain is a sequence, an infection is prevented by breaking any single link. This is the organizing idea behind all infection control, and it turns a set of seemingly unrelated practices into one clear logic. Each measure works by dropping the baton at a particular handoff.\n\n| Infection-control measure | Link it breaks |\n| --- | --- |\n| Treating or isolating an infected person | Agent \u002F Reservoir |\n| Disinfection and sterilization of equipment | Agent \u002F Reservoir |\n| Covering coughs, wearing a mask | Portal of exit; Mode of transmission |\n| Handwashing and hand hygiene | Mode of transmission |\n| Safe food and water, sanitation | Mode of transmission (vehicle) |\n| Mosquito nets, repellent, vector control | Mode of transmission (vector) |\n| Ventilation and respirators | Mode of transmission (airborne) |\n| Covering wounds, aseptic technique, safe injections | Portal of entry |\n| Barrier contraception | Portal of entry (sexual) |\n| Vaccination | Susceptible host |\n| Treating underlying illness, good nutrition | Susceptible host |\n\nNo single measure has to be perfect, and no one has to stop every link. Break the chain anywhere, and the spread stops.\n\n## How to Remember\n\n**The chain is a relay race.** Agent, reservoir, exit, transmission, entry, host. The baton has to pass through all six. Drop it anywhere and the race ends. That is why breaking one link is enough.\n\n**The order in one line:** the *agent* leaves its *reservoir* through an *exit*, *travels* to a new host, *enters*, and infects if the host is *susceptible*. Six links, always in that order.\n\n**Droplet is near, airborne is far.** Droplets are heavy and fall within a couple of meters (surgical mask is enough). Airborne particles float and travel far (TB, measles, chickenpox; needs a respirator and ventilation). Mixing these up is the most common transmission mistake.\n\n**Every infection-control habit breaks a named link.** Handwashing breaks transmission. Masks break exit and transmission. Wound care breaks entry. Vaccination protects the host. If you can name the link, you understand why the measure works.\n\n## Key exam facts\n\n| Link | What it is | How to break it |\n| --- | --- | --- |\n| Infectious agent | The disease-causing organism; its virulence and numbers matter | Treatment, disinfection, sterilization |\n| Reservoir | Where it lives: human (including carriers), animal (zoonoses), environmental | Treat\u002Fisolate cases, control animal\u002Fenvironmental sources |\n| Portal of exit | How it leaves: respiratory, GI, blood, urogenital, skin | Cover coughs, mask, safe waste disposal, cover wounds |\n| Mode of transmission | Direct (contact, droplet) or indirect (vehicle, airborne, vector) | Hand hygiene, masks, safe food\u002Fwater, vector control, ventilation |\n| Portal of entry | How it enters: skin, respiratory, GI, urogenital, transplacental; exogenous vs endogenous | Wound care, aseptic technique, safe injection, barrier methods |\n| Susceptible host | A host able to be infected; risk rises with age extremes, immune compromise, illness | Vaccination, treat underlying illness, nutrition |\n\n## Where Students Get Confused\n\n**\"Droplet and airborne transmission are the same.\"** They are not, and the difference is clinically important. Droplets are large, fall within about one to two meters, and are stopped by a surgical mask. Airborne particles are small, stay suspended, travel long distances, and require a fitted respirator and special ventilation. The classic airborne organisms are tuberculosis, measles, and chickenpox.\n\n**\"Reservoir and source are the same as portal of exit.\"** The reservoir is *where the organism lives*; the portal of exit is *how it leaves*. A person can be the reservoir, and the respiratory tract their portal of exit. Keep \"where it lives\" and \"how it gets out\" separate.\n\n**\"A carrier is not really infected, so they can't spread disease.\"** The opposite is true and dangerous. A carrier harbors and sheds the organism without symptoms, which makes them an unrecognized reservoir. Carriers are an important source precisely because they look healthy.\n\n**\"If the organism reaches me, I will get sick.\"** Not necessarily. Disease requires the right portal of entry and a susceptible host. The same organism swallowed may be destroyed by stomach acid, while injected under the skin it causes disease; and a healthy host may resist an exposure that infects a weakened one.\n\n**\"You have to break every link to stop an infection.\"** No, and this is the key practical point. The chain is a sequence, so breaking any single link stops the spread. That is why one good measure, handwashing, a mask, a vaccine, can be enough.\n\n**References**\n\n1. Centers for Disease Control and Prevention. (2024). *Infection Control: Isolation Precautions, Scientific Review*. \u003Chttps:\u002F\u002Fwww.cdc.gov\u002Finfection-control\u002Fhcp\u002Fisolation-precautions\u002Fscientific-review.html>\n2. Murray, P. R., Rosenthal, K. S., & Pfaller, M. A. (2021). *Medical Microbiology* (9th ed.). Elsevier.\n3. Ryan, K. J. (Ed.). (2018). *Sherris Medical Microbiology* (7th ed.). McGraw-Hill.\n4. Tille, P. M. (2022). *Bailey & Scott's Diagnostic Microbiology* (15th ed.). Elsevier.",[50,53,56,59,62,65],{"question":51,"answer":52},"\u003Cp>What is the chain of infection?\u003C\u002Fp>","\u003Cp>It is a model of how infection spreads, in six linked steps: the infectious agent, its reservoir, a portal of exit, a mode of transmission, a portal of entry, and a susceptible host. Each step must happen in order for infection to spread, so breaking any single link prevents it.\u003C\u002Fp>",{"question":54,"answer":55},"\u003Cp>What are the six links of the chain of infection?\u003C\u002Fp>","\u003Cp>Infectious agent (the organism), reservoir (where it lives), portal of exit (how it leaves), mode of transmission (how it travels), portal of entry (how it enters a new host), and susceptible host (a person able to be infected).\u003C\u002Fp>",{"question":57,"answer":58},"\u003Cp>What is the difference between droplet and airborne transmission?\u003C\u002Fp>","\u003Cp>Droplet transmission uses large respiratory droplets that fall within about one to two meters, so a surgical mask and short distance protect against them. Airborne transmission uses much smaller particles that stay suspended and travel long distances, requiring a fitted respirator and special ventilation. Tuberculosis, measles, and chickenpox are classic airborne infections.\u003C\u002Fp>",{"question":60,"answer":61},"\u003Cp>What is the difference between direct and indirect transmission?\u003C\u002Fp>","\u003Cp>Direct transmission is immediate transfer from source to host, by contact or by droplets. Indirect transmission uses an intermediate: a contaminated object or substance (vehicle), suspended air particles (airborne), or a living carrier such as an insect (vector).\u003C\u002Fp>",{"question":63,"answer":64},"\u003Cp>How do you break the chain of infection?\u003C\u002Fp>","\u003Cp>By interrupting any single link. Treating or isolating cases and sterilizing equipment target the agent and reservoir; covering coughs and masks target exit and transmission; handwashing, safe food and water, and vector control target transmission; wound care and aseptic technique target entry; and vaccination strengthens the susceptible host. Because the links form a sequence, breaking one is enough.\u003C\u002Fp>",{"question":66,"answer":67},"\u003Cp>What is the difference between a reservoir and a portal of exit?\u003C\u002Fp>","\u003Cp>The reservoir is where the organism normally lives and multiplies (a person, an animal, or the environment). The portal of exit is the route the organism uses to leave that reservoir (for example, the respiratory tract through coughing).\u003C\u002Fp>",[69],"host-pathogen-interaction",[71,95,126],{"slug":72,"title":73,"description":74,"seoTitle":42,"seoDescription":42,"author":44,"createdDate":45,"lastUpdatedDate":45,"draft":46,"category":47,"image":42,"faq":75,"tags":94},"bacterial-pathogenesis","Bacterial Pathogenesis: How Bacteria Cause Disease","\u003Cp>How bacteria cause disease, step by step: pathogenicity versus virulence, infectious dose, entry, adherence, colonization, invasion, toxins, and how pathogens evade the immune system.\u003C\u002Fp>",[76,79,82,85,88,91],{"question":77,"answer":78},"\u003Cp>How do bacteria cause disease?\u003C\u002Fp>","\u003Cp>In a sequence. A bacterium enters the body through a portal of entry, attaches to host cells, multiplies to establish itself, then damages the host by spreading into tissue or releasing toxins. Whether disease actually results depends on how many organisms arrive, how virulent they are, and how strong the host's defenses are.\u003C\u002Fp>",{"question":80,"answer":81},"\u003Cp>What is the difference between pathogenicity and virulence?\u003C\u002Fp>","\u003Cp>Pathogenicity is whether an organism can cause disease at all, a yes-or-no property. Virulence is how strongly it causes disease, a matter of degree. A highly virulent organism causes severe disease and can do so with very few organisms.\u003C\u002Fp>\u003Cp>\u003C\u002Fp>",{"question":83,"answer":84},"\u003Cp>What is an infectious dose?\u003C\u002Fp>","\u003Cp>The minimum number of organisms needed to establish an infection. Below it, the body clears the invaders before they take hold. Highly virulent organisms have a low infectious dose; weakly virulent ones need to arrive in large numbers. Handwashing and cooking reduce infection by pushing the number below this threshold.\u003C\u002Fp>",{"question":86,"answer":87},"\u003Cp>What is the difference between an exotoxin and an endotoxin?\u003C\u002Fp>","\u003Cp>Exotoxins are potent proteins secreted by living bacteria; they can travel and damage distant organs, and both Gram-positive and Gram-negative bacteria make them (examples: tetanus, botulinum, and cholera toxins). Endotoxin is the lipopolysaccharide of the Gram-negative cell wall, released mainly when the cell breaks apart, and it causes fever and, in large amounts, shock.\u003C\u002Fp>",{"question":89,"answer":90},"\u003Cp>Why are encapsulated bacteria more dangerous?\u003C\u002Fp>","\u003Cp>The capsule resists phagocytosis, the body's main way of engulfing and destroying invaders. This lets encapsulated organisms survive in the bloodstream and cross into protected sites. It is why the classic causes of bacterial meningitis (\u003Cem>Streptococcus pneumoniae\u003C\u002Fem>, \u003Cem>Haemophilus influenzae\u003C\u002Fem> type b, \u003Cem>Neisseria meningitidis\u003C\u002Fem>) are all encapsulated, and why several vaccines are designed to target the capsule.\u003C\u002Fp>",{"question":92,"answer":93},"\u003Cp>What is the difference between a true pathogen and an opportunistic pathogen?\u003C\u002Fp>","\u003Cp>A true pathogen can cause disease in a healthy person with normal defenses. An opportunistic pathogen rarely causes disease in a healthy person but does so when the immune system is weakened or when it reaches a body site where it does not belong.\u003C\u002Fp>",[69],{"slug":96,"title":97,"description":98,"seoTitle":42,"seoDescription":99,"author":44,"createdDate":45,"lastUpdatedDate":45,"draft":46,"category":47,"image":42,"faq":100,"tags":125},"normal-flora-of-human-body","Normal Flora of the Human Body: Where It Lives, How It Helps, and When It Harms","\u003Cp>Normal flora are the microbes that live on and inside us. Where they live, where the body stays sterile, how we first acquire them, how they protect us, and why they sometimes cause infection.\u003C\u002Fp>","The resident and transient microbes of the human body: how a sterile newborn becomes colonized for life, how normal flora defend us, and why they turn into op",[101,104,107,110,113,116,119,122],{"question":102,"answer":103},"\u003Cp>What is the normal flora of the human body?\u003C\u002Fp>","\u003Cp>Normal flora are the microorganisms, mostly bacteria, that live on and inside the healthy body without causing disease under normal conditions. They live on the skin, in the mouth and upper airway, in the gut (most densely in the colon), in the vagina, and on the distal urethra. Sites such as blood, cerebrospinal fluid, deep tissue, and the bladder are normally kept sterile.\u003C\u002Fp>",{"question":105,"answer":106},"\u003Cp>Are we born with normal flora?\u003C\u002Fp>","\u003Cp>No. The healthy fetus is essentially sterile, and colonization begins at birth. A vaginally born baby is first seeded with the mother's vaginal and gut organisms; a baby born by cesarean is seeded mostly by skin and environmental bacteria. Seeding continues through contact, feeding, and the environment over the first months of life.\u003C\u002Fp>",{"question":108,"answer":109},"\u003Cp>What is the difference between resident and transient flora?\u003C\u002Fp>","\u003Cp>Resident flora live and multiply at a body site and return after washing. Transient flora arrive from the environment or contact, survive briefly, and then die off or are shed. Hand hygiene is aimed mainly at removing transient flora.\u003C\u002Fp>",{"question":111,"answer":112},"\u003Cp>How does normal flora help the body?\u003C\u002Fp>","\u003Cp>Its most important job is colonization resistance: residents occupy attachment sites, use up nutrients, and make acids and bacteriocins, so pathogens cannot easily settle. Normal flora also makes vitamin K and B vitamins, trains the immune system, and helps digest dietary fiber.\u003C\u002Fp>",{"question":114,"answer":115},"\u003Cp>Can normal flora cause disease?\u003C\u002Fp>","\u003Cp>Yes, as an opportunist. It causes disease when it reaches a normally sterile site (for example skin bacteria entering the blood on a needle), when the host's immune defenses are weakened, or when the balance is disturbed, as when antibiotics remove gut residents and \u003Cem>Clostridioides difficile\u003C\u002Fem> overgrows.\u003C\u002Fp>",{"question":117,"answer":118},"\u003Cp>Why does the body disinfect the skin before taking blood, and restrict visitors on surgical wards?\u003C\u002Fp>","\u003Cp>Both protect sterile sites from normal flora. Skin is covered in bacteria and blood is sterile, so skin is disinfected before a needle crosses it. On surgical and immunocompromised wards, a visitor's harmless flora can infect a patient whose open wound or weakened immunity makes those same organisms dangerous.\u003C\u002Fp>",{"question":120,"answer":121},"\u003Cp>Why does the surgical team wear masks if the bacteria are already normal flora?\u003C\u002Fp>","\u003Cp>Because a harmless resident of one body site can be a pathogen in another. \u003Cem>Staphylococcus aureus\u003C\u002Fem> lives harmlessly in the nose of about a third of healthy people, but a surgical wound is an open route into sterile tissue. A mask helps stop a carrier on the surgical team from seeding the patient's wound with nasal \u003Cem>S. aureus\u003C\u002Fem> through talking, coughing, or sneezing. The patient's own nose is the more common source, which is why carriers may be treated before surgery.\u003C\u002Fp>",{"question":123,"answer":124},"\u003Cp>Why do babies not smell bad, but teenagers do?\u003C\u002Fp>","\u003Cp>Body odor comes from skin bacteria breaking down the rich secretions of the apocrine glands. Those glands stay largely inactive until puberty, so before then the flora has little to work on. The sweet newborn scent comes mainly from vernix and sebum, not from bacterial breakdown.\u003C\u002Fp>",[],{"slug":127,"title":128,"description":129,"seoTitle":42,"seoDescription":130,"author":44,"createdDate":45,"lastUpdatedDate":45,"draft":46,"category":47,"image":42,"faq":131,"tags":150},"types-of-infection","Types and Patterns of Infection: How Infections Are Described","\u003Cp>The types and patterns of infection explained through four questions: how widespread, how many microbes, what time-course, and where acquired, plus carrier states and their clinical importance.\u003C\u002Fp>","Localized vs systemic, primary vs secondary, acute vs chronic, community vs hospital-acquired, and the carrier states, organized as the questions a clinician ",[132,135,138,141,144,147],{"question":133,"answer":134},"\u003Cp>What are the main types of infection?\u003C\u002Fp>","\u003Cp>Infections are described in several ways at once: by how widespread they are (localized, focal, systemic), by how many organisms and in what order (primary, secondary, mixed), by time-course and severity (acute, chronic, latent), and by where they were acquired (community-acquired or hospital-acquired). A single infection can be described on all of these at the same time.\u003C\u002Fp>",{"question":136,"answer":137},"\u003Cp>What is the difference between bacteremia and sepsis?\u003C\u002Fp>","\u003Cp>Bacteremia simply means bacteria are present in the blood, which can be brief and harmless. Sepsis is the body's dangerous, dysregulated response to infection, defined as life-threatening organ dysfunction. Bacteremia can lead to sepsis, but they are not the same, and not all bacteremia becomes sepsis.\u003C\u002Fp>",{"question":139,"answer":140},"\u003Cp>What is the difference between a primary and a secondary infection?\u003C\u002Fp>","\u003Cp>A primary infection is the first infection in a healthy host. A secondary infection is a new infection by a different organism that takes hold because the first infection weakened the host or disturbed the normal flora, such as a bacterial pneumonia following influenza.\u003C\u002Fp>",{"question":142,"answer":143},"\u003Cp>What is the difference between a latent and a chronic infection?\u003C\u002Fp>","\u003Cp>A chronic infection is continuously active over a long period. A latent infection is quiet and inactive between episodes, with the organism present but silent until it reactivates. Herpes and tuberculosis are classic latent infections.\u003C\u002Fp>",{"question":145,"answer":146},"\u003Cp>What is a carrier, and why are carriers important?\u003C\u002Fp>","\u003Cp>A carrier is a person who harbors an organism and can spread it while showing no signs of disease. Carriers are important because they appear healthy, so they spread infection without anyone realizing they are the source. The best-known example is \"Typhoid Mary,\" a chronic carrier who spread typhoid for years while remaining well.\u003C\u002Fp>",{"question":148,"answer":149},"\u003Cp>What is a nosocomial infection?\u003C\u002Fp>","\u003Cp>A nosocomial, or healthcare-associated, infection is one acquired in a hospital or healthcare facility, not present or incubating at the time of admission. Common examples include catheter-associated urinary tract infections, ventilator-associated pneumonia, and surgical-site infections. They matter because the organisms involved are more often drug-resistant and the patients are often already vulnerable.\u003C\u002Fp>",[69],{"enabled":152,"threads":153,"total":154},true,[],0,[156,162,169,176,182,187,193,198,204,207,214],{"slug":157,"name":44,"description":158,"image":159,"body":160,"postCount":161},"acharya-tankeshwar","Editor-in-chief","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Ftankeshwar-acharya-author-microbeonline.jpg","***Tankeshwar Acharya, MSc (Medical Microbiology)***\n\n*Tankeshwar Acharya is an Assistant Professor in the Department of Microbiology at Patan Academy of Health Sciences (PAHS), Nepal, where he has been teaching and practicing clinical microbiology for over 14 years. He is the founder of Microbe Online, one of the leading free microbiology education resources on the web, covering bacteriology, mycology, parasitology, immunology, and clinical laboratory diagnostics written from direct experience in both the classroom and the diagnostic laboratory.*",473,{"slug":163,"name":164,"description":165,"image":166,"body":167,"postCount":168},"ashma-shrestha","Ashma Shrestha","SEO Copywriter and Science Communicator\nKathmandu, Nepal","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fashma-shrestha.png","Ashma Shrestha holds a Master of Science in Medical Microbiology from the Institute of Science and Technology (IOST), Tribhuvan University, Nepal, where she developed a strong foundation in virology, molecular biology, and diagnostic microbiology.\n\nShe now works as an SEO Copywriter at Resolution Digital, where she combines her scientific training with research-driven content strategy. She is certified in Google Analytics and Google Business Profile (GBP), and brings a data-informed approach to science communication writing content that is not only accurate but structured to reach and serve the students who need it most.\n\nAt microbeonline, Ashma contributes articles primarily in virology and molecular biology, areas she finds most compelling for their mechanistic depth and their growing clinical relevance. Her writing reflects the same standard the site is built on: factual rigor, clear explanation of the *why* behind microbiology concepts, and content that helps students move from memorization to genuine understanding.\n\nShe is passionate about making complex microbiological concepts accessible without sacrificing accuracy; a skill that sits at the intersection of her scientific training and her professional work in content and SEO.",78,{"slug":170,"name":171,"description":172,"image":173,"body":174,"postCount":175},"sushmita-baniya","Sushmita Baniya","Author \u002F Contributor","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fsushmita-baniya-1.png","Sushmita Baniya holds an M.Sc. in Medical Microbiology from Tribhuvan University (National College), with a research focus in Genetics and Molecular Biology. She is actively involved in teaching and research in the field of microbiology.",26,{"slug":177,"name":178,"description":172,"image":179,"body":180,"postCount":181},"samikshya-acharya","Samikshya Acharya","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fsamikshya-acharya.jpeg","Samikshya Sharma completed her postgraduate studies in Medical Microbiology at the Central Department of Microbiology, Tribhuvan University, Nepal. She contributes to Microbeonline with the goal of making foundational and clinical microbiology concepts clear and useful for students in medical, laboratory science, and allied health programs.",20,{"slug":183,"name":184,"description":172,"image":42,"body":185,"postCount":186},"alisha-tripathi","Alisha Tripathi","Alisha Tripathi holds an M.Sc. in Medical Microbiology from National College, Tribhuvan University. With over a year of teaching experience, her academic interests span Molecular Biology, Immunology, and Genetics.",6,{"slug":188,"name":189,"description":190,"image":42,"body":191,"postCount":192},"aastha-shrestha","Aastha Shrestha"," Author \u002F Contributor","Aastha Shrestha is a Biotechnology graduate with an M.Sc. from National College, Tribhuvan University. Her academic interests center on Molecular Biology and Immunology; two fields that are increasingly converging in modern diagnostic and clinical microbiology. \n\nShe contributes to Microbeonline with the goal of making complex concepts in these areas approachable and exam-relevant for students across medical, biotechnology, and laboratory science programs.",9,{"slug":194,"name":195,"description":196,"image":42,"body":42,"postCount":197},"guest-author","Guest Author","Guest Author \u002F Contributor",1,{"slug":199,"name":200,"description":172,"image":201,"body":202,"postCount":203},"srijana-khanal","Srijana Khanal","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fsrijana-khanal-1.png","Srijana Khanal is a microbiology educator with nearly a decade of teaching experience, including her role as faculty in the Microbiology Department at National College, NIST. \n\nHer time in the classroom has given her a clear sense of where students struggle and what explanations actually work, a perspective that directly shapes how she writes.\n\nHer academic interests span Immunology, Genetics, Basic Sciences, and Research Methodology, and she brings the same rigor to her writing that she brought to teaching. Alongside academic writing, she has a passion for creative writing -- an instinct that shows in her ability to make dense scientific material readable without sacrificing accuracy.\n\nShe contributes to Microbeonline to extend her teaching reach beyond the classroom, helping medical and laboratory science students across the region build a stronger foundation in microbiology.",16,{"slug":205,"name":206,"description":196,"image":42,"body":42,"postCount":197},"dr-poonam-acharya","Dr. Poonam Acharya",{"slug":208,"name":209,"description":210,"image":211,"body":212,"postCount":213},"nisha-rijal","Nisha Rijal","Microbiologist and AMR Specialist Kathmandu, Nepal","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fnisha-rijal-1.png","Nisha Rijal is a microbiologist with nearly 15 years of frontline diagnostic and surveillance experience at the National Public Health Laboratory (NPHL), national reference laboratory under the Department of Health Services, Nepal. She currently works as an AMR Support Officer at the World Health Organization (WHO), Nepal, where her work focuses on strengthening antimicrobial resistance surveillance systems and translating AMR data into actionable public health response.\n\nHer research, published in peer-reviewed journals and cited over 220 times, spans some of the most clinically significant infectious disease challenges in Nepal and South Asia: antimicrobial resistance trends in *Vibrio cholerae* across an 11-year national surveillance dataset, sero-epidemiology of scrub typhus in patients with acute febrile illness, lower respiratory tract infections in HIV-positive patients, and gonococcal resistance surveillance. She was a contributor to Nepal's National Antimicrobial Resistance Containment Action Plan, a foundational policy document for AMR governance in Nepal. You can find list of [Nisha Rijal's article here in Google Scholar.](https:\u002F\u002Fscholar.google.com\u002Fcitations?user=N-Ruq54AAAAJ&hl=en)\n\nThis depth of experience is visible in her writing at Microbeonline. Her 53 published articles cover bacteriology, parasitology, mycology, immunology, and laboratory techniques, and are consistently among the most detailed and clinically grounded content on the site. She brings to every article the same standard that national reference laboratory work demands: methodological precision, awareness of real diagnostic constraints, and an understanding of what results actually mean for patient care in resource-limited settings.\n\nHer areas of particular expertise include antimicrobial susceptibility testing and resistance mechanism detection, quality assurance in clinical microbiology, and laboratory-based infectious disease surveillance.\n\n---\n\n*Nisha Rijal contributes to Microbeonline in a personal capacity. Her views and writing do not represent the positions of the World Health Organization or any other institution.*",54,{"slug":215,"name":216,"description":217,"image":218,"body":219,"postCount":197},"padma-shrestha","Padma Shrestha","Author","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fpadma-shrestha.png","Padma Shrestha is from Kathmandu, Nepal. She has completed Masters degree in Medical microbiology from Tribhuvan University. She has great interest in Microbiology and Molecular Biology.",[221,228,234,239,244,249,253,257,261,266,270,275,279,284,289,293,297,301,306,311,315,319,323,328,332,336,340,344,349,354,358,362,366,370,374,378,382,386,390,394,398,402,406,410,414,418,422,426,431,435,439,443,447,451,455,459,463,467,471,475,479,483,487,491,495,499,503,507,510,514,517],{"slug":222,"name":223,"description":224,"image":225,"body":226,"postCount":227},"gram-negative-cocci","Gram-Negative Cocci and Coccobacilli","Neisseria, Moraxella, Haemophilus and related gram-negative coccal organisms","https:\u002F\u002Fassets.microbeonline.com\u002Ftags\u002Fgram-negative-cocci.png","# Gram Negative Cocci\n\nNeisseria gonorrhoeae, Neisseria meningitides, Moraxella catarrhalis, and other Neisseria spp. are clinically relevant gram-negative cocci.\n\nN. gonorrhoeae is the leading cause of sexually transmitted disease whereas N. meningitides is a leading cause of fatal bacterial meningitis.",14,{"slug":229,"name":230,"description":231,"image":42,"body":232,"postCount":233},"microscopy","Microscopy","Microscope types, components, and microscopy techniques","These are list of blog posts related to microscopy. ",12,{"slug":235,"name":236,"description":237,"image":42,"body":42,"postCount":238},"gram-positive-cocci","Gram-Positive Cocci","Staphylococcus, Streptococcus, Enterococcus, Micrococcus — organisms, diseases, and identification tests",11,{"slug":240,"name":241,"description":242,"image":42,"body":42,"postCount":243},"gram-negative-rods","Gram-Negative Rods (Other than Enterobacteriaceae)","\u003Cp>Gram negative rods other than members of Enterobacteriaceae family such as  Pseudomonas, Acinetobacter and related organisms\u003C\u002Fp>",5,{"slug":245,"name":246,"description":247,"image":42,"body":42,"postCount":248},"gram-positive-rods","Gram-Positive Rods","Bacillus, Clostridium, Listeria, Corynebacterium, Actinomyces and related organisms",8,{"slug":250,"name":251,"description":252,"image":42,"body":42,"postCount":238},"mycobacteria","Mycobacteria","Mycobacterium tuberculosis, leprosy, atypical mycobacteria, and acid-fast organism diagnosis",{"slug":254,"name":255,"description":256,"image":42,"body":42,"postCount":238},"anaerobic-bacteriology","Anaerobic Bacteriology","Anaerobic organisms, anaerobic culture methods, and anaerobic infection diagnosis",{"slug":258,"name":259,"description":260,"image":42,"body":42,"postCount":233},"enterobacteriaceae","Enterobacteriaceae","Identification, differentiation, and clinical significance of Enterobacteriaceae family members",{"slug":262,"name":263,"description":264,"image":42,"body":42,"postCount":265},"spirochetes","Spirochetes","Treponema, Leptospira, Borrelia and spirochetal infections",7,{"slug":267,"name":268,"description":269,"image":42,"body":42,"postCount":227},"food-microbiology","Food Microbiology","Food-borne pathogens, food safety, spoilage, and preservation",{"slug":271,"name":272,"description":273,"image":42,"body":42,"postCount":274},"antimicrobial-susceptibility-testing","Antimicrobial Susceptibility Testing","Methods for testing antibiotic susceptibility in clinical microbiology",21,{"slug":276,"name":277,"description":278,"image":42,"body":42,"postCount":248},"antimicrobials-moa-amr","Antimicrobials (MOA & AMR)","Mechanisms, detection, and clinical significance of antimicrobial resistance",{"slug":280,"name":281,"description":282,"image":42,"body":42,"postCount":283},"sterilization-disinfection","Sterilization and Disinfection","Methods of sterilization and disinfection in healthcare and laboratory settings",10,{"slug":285,"name":286,"description":287,"image":42,"body":42,"postCount":288},"specimen-collection-transport","Specimen Collection and Transport","Collection, handling, and transport of clinical specimens for microbiological testing",27,{"slug":290,"name":291,"description":292,"image":42,"body":42,"postCount":274},"bacterial-structure-physiology","Bacterial Structure and Physiology","Bacterial cell structure, growth, physiology, and environmental factors affecting growth",{"slug":294,"name":295,"description":42,"image":42,"body":296,"postCount":186},"horizontal-gene-transfer","Horizontal Gene Transfer","Articles related to **Horizontal Gene Transfer**",{"slug":298,"name":299,"description":42,"image":42,"body":300,"postCount":283},"chromatography","Chromatography","Information about chromatographic techniques.",{"slug":302,"name":303,"description":304,"image":42,"body":305,"postCount":265},"electrophoresis","Electrophoresis","Information about Electrophoresis Techniques ","Detailed information  about Electrophoresis Techniques ",{"slug":307,"name":308,"description":309,"image":42,"body":310,"postCount":186},"pcr-techniques","PCR Techniques","Information about various types of Polymerase Chain Reaction Techniques ","More detailed information about various types of Polymerase Chain Reaction Techniques ",{"slug":312,"name":313,"description":314,"image":42,"body":42,"postCount":186},"bacteriophage","Bacteriophage","Description about Bacteriophage.",{"slug":316,"name":317,"description":318,"image":42,"body":42,"postCount":186},"malaria","Malaria","It is the collections of articles regarding malarial disease. ",{"slug":320,"name":321,"description":322,"image":42,"body":42,"postCount":186},"anaerobic-culture-techniques","Anaerobic Culture Techniques","Posts related with Anaerobic Culture Techniques.",{"slug":324,"name":325,"description":326,"image":42,"body":42,"postCount":327},"immunoassays","Immunoassays","You will get information about all the diagnostic tests that rely on the specific binding between an antigen and an antibody to detect or quantify a substance.",19,{"slug":329,"name":330,"description":331,"image":42,"body":42,"postCount":265},"biosafety-levels","Biosafety levels ","Articles related to Biosafety Levels",{"slug":333,"name":334,"description":335,"image":42,"body":42,"postCount":243},"environmental-factors","Environmental Factors ","In this case we are talking about growth requirements of microorganisms with deep dive in environmental factors that affect the growth. ",{"slug":337,"name":338,"description":339,"image":42,"body":42,"postCount":186},"pipette","Pipette","Posts related with Pipette. ",{"slug":341,"name":342,"description":343,"image":42,"body":42,"postCount":248},"bacteriology-mcqs","Bacteriology MCQs","This sections lists MCQs in Bacteriology.",{"slug":345,"name":346,"description":347,"image":42,"body":42,"postCount":348},"parasitology-mcqs","Parasitology MCQs","This section lists MCQs in Parasitology.",2,{"slug":350,"name":351,"description":352,"image":42,"body":42,"postCount":353},"virology-mcqs","Virology MCQs","This is the collections of Multiple Choice Questions in Virology.",4,{"slug":355,"name":356,"description":357,"image":42,"body":42,"postCount":243},"mcqs-in-microbiology","MCQs in Microbiology","This section lists the collections of Multiple Choice Questions in General Microbiology Topics. ",{"slug":359,"name":360,"description":361,"image":42,"body":42,"postCount":248},"immunology-mcqs","Immunology MCQs","In this section; we are posting collections of Multiple Choice Questions about Immunology. ",{"slug":363,"name":364,"description":365,"image":42,"body":42,"postCount":192},"microbial-curiosities","Microbial Curiosities","In this clusters, we are posting interesting and unique information about Microorganisms. ",{"slug":367,"name":368,"description":369,"image":42,"body":42,"postCount":274},"bacterial-culture-media","Bacterial Culture Media","Posts related to Bacterial Culture Media. ",{"slug":371,"name":372,"description":373,"image":42,"body":42,"postCount":186},"fungal-culture-media","Fungal Culture Media","Posts related to Fungal Culture Media.",{"slug":375,"name":376,"description":377,"image":42,"body":42,"postCount":243},"motility-test","Motility Test","This lists the procedure regarding various tests methods for bacterial motility.",{"slug":379,"name":380,"description":381,"image":42,"body":42,"postCount":283},"bacterial-enumeration","Bacterial enumeration","These posts are related to isolation and enumeration of bacteria. ",{"slug":383,"name":384,"description":385,"image":42,"body":42,"postCount":348},"gram-positive-coccobacillus","Gram-positive coccobacillus","List of Gram Positive Coccobacilli",{"slug":387,"name":388,"description":389,"image":42,"body":42,"postCount":353},"dimorphic-fungi","Dimorphic Fungi","This is about various dimorphic fungi. ",{"slug":391,"name":392,"description":393,"image":42,"body":42,"postCount":265},"bacterial-classification","Bacterial Classification","These posts are related with various approaches used for the classification of Bacteria. ",{"slug":395,"name":396,"description":397,"image":42,"body":42,"postCount":243},"immunofluorescence","Immunofluorescence ","Various Tests related to Immunofluorescence ",{"slug":399,"name":400,"description":401,"image":42,"body":42,"postCount":192},"antibody-mediated-immunity","Antibody-mediated Immunity","This clusters links the articles that are sharing insights about Antibody-mediated immunity. ",{"slug":403,"name":404,"description":405,"image":42,"body":42,"postCount":265},"hypersensitivity","Hypersensitivity","Articles related to Hypersensitivity.",{"slug":407,"name":408,"description":42,"image":42,"body":42,"postCount":409},"haemophilus","Haemophilus",3,{"slug":411,"name":412,"description":413,"image":42,"body":42,"postCount":353},"sexually-transmitted-infections-stis","Sexually transmitted infections (STIs)","This is the clusters of infections that are transmitted sexually. ",{"slug":415,"name":416,"description":417,"image":42,"body":42,"postCount":233},"adaptive-immunity","Adaptive Immunity","Blog posts related to B Cell Immunity and T Cell Immunity.",{"slug":419,"name":420,"description":421,"image":42,"body":42,"postCount":227},"fungal-diagnostics","Fungal Diagnostics","Various methods used for the Diagnosis of Fungal Infections. ",{"slug":423,"name":424,"description":425,"image":42,"body":42,"postCount":243},"laboratory-storage-and-preservation","Laboratory Storage and Preservation","Articles about Laboratory Storage of Antimicrobial Disk, Test organisms and Equipment used for this process. ",{"slug":427,"name":428,"description":429,"image":42,"body":430,"postCount":186},"laboratory-heating-equipment","Laboratory Heating Equipment","A guide to laboratory heating equipment, including hot plates, water baths, Bunsen burners, incubators, and dry baths, and how to choose the right one for each task.","Laboratory heating equipment covers the instruments that warm, melt, incubate, or sterilize samples and media in a microbiology laboratory. Each one delivers heat differently. \n\nA hot plate gives high, direct, dry heat; a water bath gives gentle, even, wet heat up to about 100°C; a Bunsen burner gives an open flame for rapid, very high heat; an incubator holds cultures at a steady temperature over hours or days; and a dry bath heats small tubes without water. Choosing the right one depends on the temperature you need, how precise it must be, and whether the sample can tolerate direct or open-flame heat.\n\nThe articles below cover each piece of heating equipment in detail, including its parts, working principle, uses, and the mistakes that most often go wrong at the bench.",{"slug":432,"name":433,"description":434,"image":42,"body":42,"postCount":248},"laboratory-glassware","Laboratory Glassware","Posts about Laboratory Glassware. ",{"slug":436,"name":437,"description":438,"image":42,"body":42,"postCount":186},"helminths","Helminths","In this section, we are covering properties, life cycle, pathogenesis and laboratory diagnosis of Helminths\u002FHelminthic infestations. ",{"slug":440,"name":441,"description":442,"image":42,"body":42,"postCount":186},"protozoan-parasite","Protozoan Parasite","In this cluster, we are covering protozoan parasites. ",{"slug":444,"name":445,"description":446,"image":42,"body":42,"postCount":197},"tests-for-gram-positive-cocci","Biochemical Tests for Gram Positive Cocci","This is the lists of Biochemical Tests that are used for Gram Positive Cocci. ",{"slug":448,"name":449,"description":450,"image":42,"body":42,"postCount":283},"bacterial-staining-technique","Bacterial Staining Technique","Lists of various staining techniques that are used to stain bacteria. ",{"slug":452,"name":453,"description":454,"image":42,"body":42,"postCount":181},"enzyme-tests","Enzyme Tests","\u003Cp>Various Biochemical Test that are based on enzymatic activity of the microorganisms. \u003C\u002Fp>",{"slug":456,"name":457,"description":458,"image":42,"body":42,"postCount":238},"carbohydrate-utilization","Carbohydrate Utilization","\u003Cp>Various biochemical tests which are related to Carbohydrate fermentation or Utilization\u003C\u002Fp>",{"slug":460,"name":461,"description":462,"image":42,"body":42,"postCount":243},"susceptibility-based-id","Susceptibility-based ID","\u003Cp>These are susceptibility based identification test such as optochin sensitivity, bacitracin sensitivity etc. \u003C\u002Fp>",{"slug":464,"name":465,"description":466,"image":42,"body":42,"postCount":353},"microbial-metabolism","Microbial Metabolism","\u003Cp>Tests about Microbial Metabolism. \u003C\u002Fp>",{"slug":468,"name":469,"description":470,"image":42,"body":42,"postCount":248},"substrate-utilization","Substrate Utilization","\u003Cp>The test in which a non-sugar carbon\u002Fnitrogen source is used or degraded (citrate, malonate, decarboxylases, indole, PAD).\u003C\u002Fp>",{"slug":472,"name":473,"description":474,"image":42,"body":42,"postCount":409},"atypical-pneumonia","Atypical Pneumonia","\u003Cp>Organisms responsible for Atypical Pneumonia. \u003C\u002Fp>",{"slug":476,"name":477,"description":478,"image":42,"body":42,"postCount":243},"antigen","Antigen","\u003Cp>Various articles related to Antigens.\u003C\u002Fp>",{"slug":480,"name":481,"description":482,"image":42,"body":42,"postCount":265},"innate-immunity","Innate Immunity","\u003Cp>Articles related to Innate Immunity. \u003C\u002Fp>",{"slug":484,"name":485,"description":486,"image":42,"body":42,"postCount":353},"respiratory-tract-infection","Respiratory Tract Infection","\u003Cp>In this cluster, you can see various etiological agents that causes respiratory tract infection. \u003C\u002Fp>",{"slug":488,"name":489,"description":490,"image":42,"body":42,"postCount":243},"torch-infection","TORCH Infection","\u003Cp>In this section; you can find articles related with TOCH infection. \u003C\u002Fp>",{"slug":492,"name":493,"description":494,"image":42,"body":42,"postCount":265},"microbiology-for-beginners","Microbiology for Beginners","\u003Cp>These articles are very basic articles, which will share general concepts in Microbiology. \u003C\u002Fp>",{"slug":496,"name":497,"description":498,"image":42,"body":42,"postCount":186},"dna-replication","DNA Replication","\u003Cp>Articles related to DNA and Replication of DNA. \u003C\u002Fp>",{"slug":500,"name":501,"description":502,"image":42,"body":42,"postCount":265},"genetic-code","Genetic Code","\u003Cp>Articles related to Genetic Code.\u003C\u002Fp>",{"slug":504,"name":505,"description":506,"image":42,"body":42,"postCount":243},"molecular-technique","Molecular Technique","\u003Cp>Posts related to Molecular Techniques. \u003C\u002Fp>",{"slug":508,"name":509,"description":42,"image":42,"body":42,"postCount":197},"colorimetric-assay","Colorimetric Assay ",{"slug":511,"name":512,"description":513,"image":42,"body":42,"postCount":243},"pharmaceutical-microbiology","Pharmaceutical Microbiology","\u003Cp>Various articles related to Pharmaceutical Microbiology\u003C\u002Fp>",{"slug":515,"name":516,"description":42,"image":42,"body":42,"postCount":409},"blood-and-immune-cells","Blood and Immune Cells",{"slug":69,"name":518,"description":42,"image":42,"body":42,"postCount":243},"Host Pathogen Interaction"]