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Microbiology

Microbiology
Coliform bacteria on fermentation of carbohydrates yields

formic acid
all of these
lactic acid
acetic acid

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

Shigella
Salmonella
Yersinia
All of these

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Microbiology
The bacteria that is negative for fermentation of mannitol is

S dysenteriae
S sonnei
S flexneri
S boydii

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Microbiology
Dysentery may be caused by

enteroinvasive E. coli
verotoxigenic E. coli
enterotoxigenic E. coli
enteropathogenic Escherichia coli

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Microbiology
Which of the following property(ies) is/are seen in the members of family Enterobacteriaceae?

They are oxidase-negative
They are catalase-positive
They ferment glucose
They reduce nitrates to nitrites

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Microbiology
In Widal test, the significant titre for O agglutinins is generally

1:100 or more
1:2.00 or more
1:150 or more
1:50 or more

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