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 […]
This post was most recently updated on August 26th, 2019Gram 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 […]
This post was most recently updated on October 3rd, 2019Laboratory 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) […]
This post was most recently updated on January 21st, 2020Chromogenic 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 […]
This post was most recently updated on August 26th, 2019The advent of Electron Microscopy in 1932 open the door to visualize small subcellular structure and viruses which were beyond the scope of Light microscopy which […]
This post was most recently updated on August 26th, 2019Tryptic 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 […]
This post was most recently updated on November 15th, 2019The 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 […]
This post was most recently updated on August 26th, 2019Spread 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 […]
This post was most recently updated on August 26th, 2019Most Probable Number (MPN) is a method used to estimate the concentration of viable microorganisms in a sample by means of replicate liquid broth growth in […]
This post was most recently updated on August 26th, 2019The carbohydrate fermentation test is used to determine whether or not bacteria can ferment a specific carbohydrate. Carbohydrate fermentation patterns are useful in differentiating among bacterial groups […]
This post was most recently updated on May 5th, 2019Microorganisms can produce different types of volatile compounds which may give characteristics smell, pleasant scent or pungent odor. Production of these volatile chemicals depends on the […]
This post was most recently updated on August 26th, 2019Pour plate method is usually the method of choice for counting the number of colony-forming bacteria present in a liquid specimen. In this method, fixed amount […]
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