All living cells can be classified as either prokaryotic or eukaryotic. Bacteria are prokaryotic or prenuclear organisms (organisms without a true nucleus), while fungi, protozoa, helminths, and...
Posts by Nisha Rijal
Lecithinase test or Nagler's reaction is a biochemical test used to identify organisms that liberate phospholipases (lecithinases) e.g. Clostridium perfringens. The alpha (α) toxin of C. perfringens...
Tuberculin Skin Test (Mantoux test): Principle, Procedure, Results
The Mantoux tuberculin skin test is the standard method of determining whether a person is infected with Mycobacterium tuberculosis or has exposure to tubercle bacilli. Koch developed it in 1890, but...
Acridine orange is a fluorescent dye that intercalates or binds with the nucleic acid (either DNA or RNA) present in organisms and fluoresces to emit various colors that help differentiate cellular...
Sabouraud Agar or Sabouraud Dextrose Agar (SDA) is a selective medium primarily used for the isolation of dermatophytes. Other fungi, yeasts, and filamentous bacteria such as Nocardia can also...
Albert stain is a type of differential stain used for staining high-molecular-weight polymers of polyphosphate known as metachromatic granules or volutin granules found in Corynebacterium...