Effects of thyroxine and insulin on the trematode Schistosomatium douthitti

Abstract

This dissertation was produced from a microfilm copy of the original document. While the most advanced technological means to photograph and reproduce this document have been used, the quality is heavily dependent upon the quality of the original submitted. The following explanation of techniques is provided to help you understand markings or patterns which may appear on this reproduction. klUlllkJCI, LI UULltwi ic* o|i^v.rv.>i t iw/

Temperature stress and the development of schistosomiasis in mice

“…Mankau and Hamilton (1972), for example, in a study of the effects of sex on the juvenile-muscle phase of Trichinella spiralis, determined that male rats harbored approximately three times as many juveniles as females. Studies concerning host sex and helminths have been summarized by Solomon (1969) and by Cornford (1972).…”

“…As the ambient temperature increased, so did the number of adult worms recovered. Cornford (1972), while studying effects of thyroxine and insulin on the trematode 5 ch i s to soma t i um douthitti, noted that if the room temperature at which he maintained his infected animals varied as little as 6° C (19 to 25° C), a difference in size would result in the adult worms recovered. S. douthitti adults from mice main tained at 19° C were smaller than those from mice maintained at 25° C. However, such difference in size was significant (P < 0.05) only for female worms.…”