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Identification of Bacteria

Identification of Bacteria
Catalase production is negative in which of the following?

Staphylococcus
Salmonella
Streptococcus
Proteus

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Identification of Bacteria
What is the order of reagents used in the Gram stain?

Crystal violet, iodine, safranin, decolorizer
Crystal violet, safranin, iodine, decolorizer
Crystal violet, iodine, decolorizer, safranin
Safranin, crystal violet, decolorizer, iodine

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Identification of Bacteria
Which of the following(s) show(s) positive results for phenylalanine deaminase test?

Proteus
Morganella
All of these
Providencia

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

Green
Pink
Colourless
Purple

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

Vibrios
Shigella
Salmonella
Spirochaetes

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Identification of Bacteria
The gram-negative organisms is

None of these
Bacillus
Clostridium
Actinomyces

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