1. McFadyean’s reaction is employed for the presumptive diagnosis of

A. anthrax
B. tetanus
C. typhoid
D. all of these

2. The bacteria used to examine the efficacy of autoclave, is

A. B polymyxa
B. B brevis
C. Bacillus stearothermophilus
D. B megaterium

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

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

5. Medusa head appearance of the colonies may be due to

A. Bacillus anthracis
B. Proteus mirabilis
C. Clostridium tetani
D. Pseudomonas aeruginosa