Bile solubility test

CAMP-test : S. agalactiae shows the arrow-shaped hemolysis near the staphylococcus streak, showing a positive test for CAMP factor

A test for urease production is useful to differentiate between

#bacteriology

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#bacteriology

about salmonella all of the following are true except

About virulent factor of salmonellae

To differentiate gram negative rods, particularly E.coli

Litmus milk decolorization test

To differentiate S. pneumoniae from other alpha-hemolytic streptococci (viridans streptococci)

Catalase test: Used to differentiate those bacteria that produce the enzyme catalase, such as streptococci , from non-catalase producing bacteria such as staphylococci .

Catalase act as a catalyst in the breakdown of hydrogen peroxide to oxygen and water

Citrate utilization test used occasionally to assist in the identification of enterobacteria

If the bacteria utilize the citrate it will liberate CO2 which combine with sodium and result in sodium carbonate which is an alkaline product that change the color of the indicator from blue to green which is considered a positive reaction.

Coagulase test is used to identify _______ which produces the enzyme coagulase.

Free coagulase : converts fibrinogen directly to fibrin without requiring a coagulase reacting factor

Indole production is detected by ______ reagent which contains 4 (p)-dimethylamino-benzaldehyde

In oxidase test , reagent will be oxidized to