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Indole test: Introduction,Principle, Procedure, Result and Interpretation
Indole test for bacteria This indole test is useful for both aerobic and anaerobic gram-negative rods and really very useful in the routine identification of bacteria in Microbiology. Principle of Indole test The ability of bacteria to split indole from the amino acid tryptophan is due to the presence of the enzyme, tryptophanase. Indole, if present combines with an aldehyde in the reagent to produce a pink to red-violet quinoidal compound if using benzaldehyde reagent or...
HBsAg Test Positive: Introduction, Test Principle, Procedure, Result Interpretation
HBsAg Test Positive HBsAg test Positive as shown above picture. As you know, hepatitis B is the most common serious liver infection in the world. hepatitis B virus is responsible for this that attacks and injures the liver. According to the Hepatitis B Foundation, every year up to 1 million people die from hepatitis B despite the fact that it is preventable and treatable. The hepatitis B virus (HBV) transmits through blood and infected bodily fluids. It...
Fungal Reagent and Stains: Introduction, List and Their Uses
Introduction of Fungal reagents and stains Fungal reagents and stains are necessary for the isolation and identification of various fungi that cause a variety of fungal diseases. This makes it easier to treat such types of diseases. The most common fungal reagent and stains are as follows. List of fungal reagent and stains 20% potassium hydroxide (KOH) is very useful for the presumptive identification of fungal diseases. KOH with DMSO (Dimethyl Sulfoxide) is a modification of...