| role of steroid hormones in trichinella spiralis infection among voles. | males are generally more susceptible to parasite infection than females. this sex difference may reflect the suppressive effects of testosterone and enhancing effects of estradiol on immune function. this study characterized the role of circulating steroid hormones in sex differences after infection with the nematode trichinella spiralis. because testosterone suppresses immune function and because polygynous males have higher circulating testosterone concentrations than monogamous males, sex dif ... | 1999 | 10564208 |