The Oral Transplantation of Intestinal Stages of Trichinella spiralis

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Abstract
A study has been carried out to determine at what time in the intestinal phase Trichinella spiralis can be transplanted from one mouse to another per os. Muscle infections, comparable to those in control animals, were obtained in all mice fed 5-hour worms. Neither intestinal nor muscle infections were demonstrated for worms transplanted 24 or 28 hours beyond the infective muscle stage. Muscle larvae were recovered from 4 of 6, 7 of 8, and 8 of 11 mice inoculated with 48-, 52-, or 72-hour intestinal trichinae, respectively. Although transplanted worms were recovered from the small intestines of some mice of these time intervals, a correlation could not be made between the intestinal and muscle infections. It is suggested that some of the 72-hour intestinal females may have deposited larvae without becoming established in the intestinal mucosa of the receptor mice.

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