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Microbiology Objective Questions {  Bacillus }

1. McFadyean's reaction is employed for the presumptive diagnosis of
D.all of these
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2. The bacteria, used to examine the efficacy of autoclave, is
A.B polymyxa
B.B brevis
C.Bacillus stearothermophilus
D.B megaterium
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3. Antibodies to which of the following antigens of Bacillus anthracis are protective?
A.Capsular polypeptide
B.Somatic polysaccharide
C.Anthrax toxin
D.None of these
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4. The test(s) which can be used to differentiate anthrax bacilli from anthracoid bacilli is/are
A.presence of medusa-head colony
B.presence of capsule
C.susceptibility to gamma phage
D.all of these
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5. Medusa head appearance of the colonies may be due to
A.Bacillus anthracis
B.Proteus mirabilis
C.Clostridium tetani
D.Pseudomonas aeruginosa
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6. Food most often associated with emetic type of food poisoning caused by Bacillus cereus, is
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7. Koch's postulates were satisfied for the first time with
A.Clostridium tetani
B.Corynebacterium diphtheriae
C.Bacillus anthracis
D.Salmonella typhi
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