Potassium hydroxide (KOH) preparation is one of the most common direct fungal stains; others are PAS (periodic-acid Schiff), GMS (Grocott's methenamine silver stain), and calcofluor white. It is...
Month: April 2016
M. tuberculosis requires aerobic conditions and a protein-enriched medium for culture. Löwenstein–Jensen (LJ) slopes are the main solid media used to culture Mycobacteria. It contains inspissated...
Immunoglobulin M (IgM), the largest pentameric immunoglobulin, is a marker of recent primary infection for some diseases. IgM constitutes 5-10% of serum immunoglobulins in adults. IgM has a...
Some pathogenic microorganisms when propagated in a culture medium give distinctive colors to their colonies. Such pigmentation comes in a variety of hues and often provides important diagnostic...
Gram-Negative Cocci and Coccobacilli of Medical Significance
The most common gram-negative cocci of medical importance belong to the family Neisseriaceae which includes the genera Neisseria, Moraxella, Kingella, Acinetobacter, etc. Gram...
Influenza virus, the causative agent of seasonal flu (and pandemic flu) is a deadly contagious virus. It is the only virus of medical importance in the family Orthomyxoviruses. Paramyxoviruses...