Discussion
The following are true about Clostridium tetani:
Answer: A
Correct answer: It is a Gram positive bacilli with terminal spore
C. tetani is a Gram-positive bacillus whose spherical terminal spore swells the rod into the classic drumstick appearance. The other statements are false: it is a strict anaerobe and will not grow in air; the symptoms are produced by tetanospasmin, an exotoxin, endotoxin being a Gram-negative cell wall component; and gas gangrene is caused by C. perfringens and its relatives, not by C. tetani, which remains localised in the wound and invades nothing.
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