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Stormy clot reaction is useful in identification of

  • A.C tetani
  • B.C botulinum
  • C.C perfringens
  • D.C difficile

Answer: C

Correct answer: C perfringens

In the stormy clot or stormy fermentation reaction, C. perfringens growing in litmus milk ferments the lactose to acid, clotting the casein, and then produces so much gas that the clot is torn apart and driven up the tube against the seal. The vigour of the gas production is what makes the reaction distinctive, and it reflects the same saccharolytic activity that produces the gas in gas gangrene.

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