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Microbiology

Microbiology
Coliform bacteria on fermentation of carbohydrates yields

lactic acid
all of these
formic acid
acetic acid

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Microbiology
Staphylococcal intoxication is caused by the toxin m the food from

S. cerevisiae
none of these
Staphylococcus aureus
S. thermophillus

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

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

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Microbiology
Salmonellae can also be killed by

pasteurisation
all of these
boiling
chlorination

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Microbiology
Xylose lysine deoxycholate (XLD) agar is better selective medium than the deoxycholate citrate agar (DCA) because

it is less inhibitory to S. Dysentriae and S. flexneri
it is selective
it imparts better growth
it contains high salt concentration

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Microbiology
The bacteria that is negative for fermentation of mannitol is

S boydii
S dysenteriae
S flexneri
S sonnei

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