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Kaplan Qbank USMLE



Author7 Posts
  #1

Which of the following best describes how Clostridium perfringens evades destruction by neutrophils in patients with clostridial myonecrosis?

A) Damaging neutrophil membranes by means of a membrane-damaging toxin
B) Preventing contact with neutrophils by means of a polysaccharide capsule
C) Preventing phagocytosis by disruption of neutrophil actin polymerization
D) Survival in the cytoplasm of a neutrophil
E) Survival in the phagosome of a macrophage


  #2

A

  #3

could anyone explane this?


  #4

a

c.perferenges has lecithenase activity which causes myonecrosis


  #5

It is obviously B.
The capsule is the mechanism that enable to bacteria to evade phagocytosis.

  #6

Sorry, mess up.

  #7

yes....C. perferinges has lecithinase activity.....which causes massive damage to cells

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