Category Archives: Microbiology

Catalase postive organisms mnemonic

Mnemonic for Catalase positive organisms is: SPACE Staphylococci (important not confuse it with streptococci) Pseudomonas aeroginosa Aspergillus fumigatus Candida Enterobacteriaceae (Klebsiella,Serratia) None of the anaerobes are Catalase positive. Some other Catalase positive organisms are: Nisseria (Gonorrhea & Meningitidis) Vibrio Nocardia …

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DNA and RNA viruses

Viruses are peculiar creatures, because unlike any other organism ¬†which usually have DNA as genetic material, viruses can have DNA or RNA as genetic material, but never both in same virus. The DNA present as genetic material in a virus …

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Urease positive organisms-Mnemonic

What is urease test? Some organisms, especially bacteria produce an exoenzyme called urease. Urease test is the test which is used to identify these organisms in broth culture.Another method is by using Rapid Urease test, which helps in documenting H.Pylori …

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The structure of a virus

A virus is an infectious particle which can replicate only inside a cell using the synthetic mechanism of the cell. A virus when outside a living cell is usually dormant, and shows no signs of life.Almost two centuries had passed …

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Types of human herpes viruses and associated diseases.

Human herpes viruses are 8 in number, they are associated with a number of diseases like fifth diseases, sixth disease,herpes zoster etc.

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Bacterial diarrhea: Invasive vs Non Invasive diarrhea.

Bacterial diarrhea’s can be classified into invasive and non invasive, this classification has an important role in determining treatment modalities. Non Invasive Diarrhea Caused by release of toxins from bacteria resulting in disruption of secretory process. Characterized by watery diarrhea. …

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Important parasites

Parasites causing malabsorption in adults Giardia Lamblia E.Histolytica H.Nana Strongyloides Cyclospora Malabsorption in children G.Lamblia Isospora belli Cryptosporidium Ancylostoma duodenaLE E.Histolytica Capillaria phillipinensis Man is the defenitive host in most parasitic infections except in: Echinococcus granulosus Plasmodium Taenia Solium(man is …

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