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Microbiology

Microbiology
Primarily human pathogenic bacteria is/are ,

Salmonella typhi
S paratyphi A
all of these
S paratyphi B

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Microbiology
Which of the following species/subspecies of Klebsiella produce indole?

K pneumoniae subspecies aerogenes
K pneumoniae subspecies pneumoniae
K pneumoniae subspecies rhinoscleromatis
K oxytoca

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Microbiology
Gram-positive bacteria, responsible for food poisoning, is/are

Mycoplasmas
Clostridia
all of these
Pseudomonas

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Microbiology
In Widal test the significant titres for H agglutinins is

1:400 or more
1:200 or more
1:50 or more
1:100 ormore

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Microbiology
Which of the following toxin causing botulism is less toxic to human beings?

Type A
None of these
Type B
Type C

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Microbiology
Heat-labile enterotoxin of Escherichia coli activates

guanylate cyclase
both (a) and (b)
none of these
adenylate cyclase

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