Auramine-rhodamine fluorochrome staining, also known as "Truant method of staining," is used to visualize acid-fast bacilli (AFB). Ziehl-Neelsen (hot) and Kinyoun (cold) are still widely used in...
Year: 2015
Results of Voges-Proskauer (VP) Test The Voges-Proskauer (VP) test determines if an organism produces acetylmethylcarbinol from glucose fermentation. Voges-Proskauer is a double eponym named after...
Lactose fermenting (yellow colonies) and Lactose Non-fermenting colonies in CLED CLED (cysteine-, lactose-, and electrolyte-deficient) agar is a differential culture medium primarily used to...
Decarboxylases are a group of substrate-specific enzymes that are capable of reacting with the carboxyl (COOH) portion of amino acids, forming alkaline-reacting amines and byproduct carbon...
Hippurate hydrolysis test-Left (positive tube), Right (Negative tube) Hippurate hydrolysis occurs in an organism that can form glycine and benzoic acid. In the classical test (48 hours), the...
Streptococci are Gram-positive cocci either diplococci (lanceolate shaped; S. pneumoniae) or in chains. They are catalase-negative (an important test to differentiate streptococci from...