Electron microscope as the name suggests is a type of microscope that uses electrons instead of visible light to illuminate the object. Electromagnets function as lenses in the electron microscope, and the whole system operates […]
Fluorescence microscopy is a type of light microscope that works on the principle of fluorescence. A substance is said to be fluorescent when it absorbs the energy of invisible shorter wavelength radiation (such as UV […]
Radiation is currently used for sterilization and decontamination in the medical supplies (surgical supplies, vaccines, and drugs) and food industries. Two types of radiations are available; ionizing and non-ionizing. Radiation sterilization is not widely used […]
Disinfection is a process whereby pathogenic organisms, but not necessarily all microorganisms or spores, are destroyed. Disinfection may be accomplished by physical or chemical means. A number of factors influence the activity of disinfectants such […]
Gram-positive bacteria retain the color of the primary stain (crystal violet) in the Gram staining procedure and appear as purple/violet under a light microscope. These bacteria have a cell wall containing a thick layer of […]
Gram staining requires the use of different chemical reagents which can be purchased in ready to use forms from commercial suppliers or gram stain reagents can be prepared at the laboratory by mixing different chemicals […]
Laboratory diagnosis of intestinal parasitic infections can be carried out by detection and identification of the parasites or their particular stages (ova/egg, cyst, larva or trophozoite) in the stool specimen. Stool sample collection: Stool specimen […]
Chromogenic Culture Media are culture medium used to isolate, identify, and differentiate specific microorganism from a heterogeneous population. The medium contains chromogenic substrate which is utilized by the microorganism to give colored colonies that is specific […]
The advent of Electron Microscopy in 1932 opens the door to visualizing small subcellular structure and viruses which were beyond the scope of Light microscopy which can’t resolve objects separated by less than 0.2μm. Facts: […]
Tryptic Soy Agar is a universal medium which supports the growth of wide variety of microorganisms (both gram positive as well as gram negative bacteria grow in this medium). It is used for the isolation […]
The target readers of this blog post are general people (people who do not have health science background) who want to get basic information about “Blood Culture” as they or their relatives have recently been […]
Spread plate technique is a method employed to plate a liquid sample for the purpose of isolating or counting the bacteria present in that sample. A perfect spread plate technique will results visible and isolated colonies of bacteria […]
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