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Microbiology

Microbiology
Which of the following(s) bacteria belong to the family Entero-bacteriaceae?

All of these
Yersinia
Salmonella
Shigella

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Microbiology
Which of the following genus belongs to family Spirochaetaceae?

Treponema
Borrelia
Spirochaeta
All of these

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Microbiology
The Bacillus cereus causes gasteroenteritis by the production of an exoenterotoxin which is released in food as a result of

cell growth
cell autolysis
cell damage
cell permeation

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Microbiology
Yersinia enterocolitica and Y. pestis can be differentiated on the basis of which of the following tests?

Motility at 22°C
Decarboxylation of ornithine
All of these
Fermentation of sucrose and cellobiose

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Microbiology
Group I C. botulinum strains generally includes in

None of these
all types of strains (proteolytic)A, B and F
all types of strains (non-proteolytic) E and F
all types of strains (proteolytic)C, D and F

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Microbiology
The most important bacterium developing acidity in both low and high salt brines is

B. subtilis
L. plantarum
L. lactis
L. brevis

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