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Identification of Bacteria

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

Shigella
Salmonella
Vibrios
Spirochaetes

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

Providencia
Proteus
All of these
Morganella

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Identification of Bacteria
The process of Gram staining is based on the ability of bacterial cell wall

to retain the safranin dye
to retain the crystal violet dye during solvent treatment.
to retain part of both dyes
none of above

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Identification of Bacteria
Which of the following is commonly used as Gram's decolouriser?

Ethyl alcohol
Methyl alcohol
Acetone
A mixture of ethyl alcohol and acetone

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

Streptococcus
Staphylococcus
Salmonella
Proteus

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Identification of Bacteria
Which of the following(s) is/ are oxidase-positive bacteria?

Neisseria
Pseudomonas
All of these
Vibrio

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