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Discussion

True about gas gangrene:

  • A.Underlying skin and muscle are normal
  • B.Caused by tetanospasmin toxin
  • C.Muscle rigidity and spasm are characteristic
  • D.Most common organism implicated is Cl. perfringens

Answer: D

Correct answer: Most common organism implicated is Cl. perfringens

C. perfringens accounts for the large majority of gas gangrene. The other statements belong to tetanus or contradict the disease: the overlying skin and muscle are grossly abnormal, with oedema, discoloration, crepitus and frank necrosis; the toxin is alpha toxin, not tetanospasmin; and muscle rigidity and spasm are the picture of tetanus, whereas gas gangrene destroys muscle rather than making it contract.

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