Francisella tularensis causes life-threatening infection of animals (rabbits, hares, and rodents) and people (zoonotic disease). It is also known as ‘Rabbit Fever’ or ‘Deer Fly fever’. Properties of Francisella tularensis Causes highly infectious (as few […]
Burkholderia pseudomallei causes a life-threatening disease known as meliodiosis (also called Whitmore’s disease). It is glanders (caused by B. mallei) like disease in animals and humans. It affects both humans or animals (rats, rabbits, and guinea […]
Nocardia species are gram-positive, variably acid-fast, filamentous, and strictly aerobic organisms belonging to the actinomycetes group. Nocardia spp form branched filaments that extend along the surface (substrate hyphae) and into the air (aerial hyphae). They […]
Legionella is a faintly staining gram-negative pleomorphic rod, responsible for causing Legionnaires‘ disease; a severe form of atypical pneumonia, and Pontiac fever. Legionella was first recognized in 1976 after an outbreak of pneumonia at an American […]
Mycobacterium tuberculosis (MTB) is the causative agent of tuberculosis (TB) in humans. It is a slightly curved rod arranged singly or in groups. Mycobacterium tuberculosis grows very slowly, taking up to 6 weeks for visible […]
Corynebacterium diphtheriae also known as Klebs-Löffler bacillus is a Gram-positive bacillus responsible for causing diphtheria. Once a major cause of illness and death among children, diphtheria became a rare disease after the administration of vaccination. The […]
Clostridium perfringens is a gram-positive, anaerobic, endospore-forming bacilli, often appear as boxcar shaped. It is mainly responsible for myonecrosis (gas gangrene), food poisoning, and gangrenous cholecystitis. Properties Gram staining: Gram-variable straight rods with blunt ends […]
Clostridium tetani is an obligate anaerobic, gram-positive bacillus with terminal round spore (drum stick appearance). It is the causative agent of tetanus, a vaccine-preventable disease that classically follows a puncture wound by a rusty nail […]
Clostridium botulinum is gram-positive, endospore-forming bacilli which resemble a tennis racket appearance due to the presence of spores at the sub-terminal end. It produces an extremely lethal neurotoxin called botulinum toxin and causes botulism, a […]
Yersinia pestis is gram-negative rods responsible for highly fatal zoonotic disease, plague. Plague is one of the greatest killers known to mankind with at least three pandemics reported in history. It is transmitted to humans […]
Dark-field microscopy is a technique that can be used for the observation of living, unstained cells and microorganisms. In this microscopy, the specimen is brightly illuminated while the background is dark. It is one type […]
Bacillus anthracis, the most notorious pathogen of the genus Bacillus, is the causative agent of a serious zoonotic disease called anthrax. Anthrax is primarily a disease of wild and domestic herbivorous mammals. It is one […]
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