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Microbiology

Microbiology
Transmission of bubonic plague is by

inhalation
ingestion
all of these
rat flea

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Microbiology
The bacteria, which is more resistant to adverse environmental conditions, is

S boydii
S dysenteriae
S sonnei
S flexneri

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Microbiology
Arrange the potencies of toxin in descending order of the following canned foods

corn> spinach> peas>string beans
corn> string bean>peas>spinach
peas>string beans>spinach> corn
corn> peas>string beans>spinach

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Microbiology
Blackening in pickles occurs due to

growth of Pencillium
both (a) and (b)
the formation of hydrogen sulfide by bacteria
None of these

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Microbiology
The elimination of the scum of yeasts in the brine during the fermentation include

addition of the mustard oil
agitation of the surface
all of these
addition of the sorbic acid

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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 imparts better growth
it is selective
it contains high salt concentration

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