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Identification of Bacteria

Identification of Bacteria
The organisms that can be acid-fast stained is

Tubercle bacilli
Lepra bacilli
Nocardia
all of these

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Identification of Bacteria
The production of sufficient acid by fermentation of glucose leads to decrease in pH such that pH of the medium falls below 4.5. Which of the following test can detect it?

Methyl red test
Indole test
Citrate utilization test
Voges-Proskauer test

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Identification of Bacteria
Production of acetoin can be detected by which of the following tests?

Methyl red test
Citrate test
Voges-Proskauer test
Indole test

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Identification of Bacteria
What is the colour of gram -postive bacteria on a gram staining?

Colourless
Purple
Green
Pink

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Identification of Bacteria
Which of the following organisms can be demonstrated with silver impregnation method?

Vibrios
Spirochaetes
Salmonella
Shigella

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Identification of Bacteria
Gram staining was developed accidentally in 1884 by

Joseph Christian Gram
Hans Christian Gram
Robert Gram
Alexander Fleming

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