Retrofection in Oxyuriasis. Conclusions

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Abstract
A previous report provided exptl. evidence based on 2 human volunteers of a new type of exposure to Enterobius vermicularis, as a result of eggs hatching on moist anal mucosa and the emerging larvae migrating up the bowel to the cecal area where they mature into adults, designated "retrofection." A 3d experimental host has provided additional evidence of uncomplicated retrofection. However, in the case of one of the first volunteers, there was evidence that retrofection, once acquired, may serve as a source for super-infection from anus to mouth by contamination of fingers. "Anal toilette" every 8 hours appreciably reduced the load of the infection but failed to eliminate it. It was concluded that "anal toilette" every 6 hours would be necessary for complete control.
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