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Autoinfection is the development of L1 into small infective larvae in the gut of the host. These autoinfective larvae penetrate the wall of the lower ileum or colon or the skin of the perianal region, enter the circulation again, travel to the lungs, and then to the small intestine, thus repeating the cycle.

http://en.wikipedia.org/wiki/Strongyloides_stercoralis#Autoinfection

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Q: What happens in autoinfection of strongyloides stercoralis?
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I suspect you mean strongyloides or Strongyloides stercoralis which is a parasitic worm. See http://en.wikipedia.org/wiki/Strongyloides_stercoralis for full info.


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