To elucidate the role of T lymphocytes in primary infection with Yersinia enterocolitica, we investigated the elimination rate of this pathogen, the histomorphology of tissue lesions, and the immune responses of athymic T-cell-deficient C57BL/6 nude mice and their euthymic littermates after parenteral infection with Y. enterocolitica of serotype O:8. While a low inoculum of 3 x 10(2) Y. enteroc...

Evaluation of abscesses appearing in male and female euthymic and athymic (nude) Balb/c mice after subcutaneous injection of Trichomonas vaginalis in the dorsal region showed that females were more susceptible than males. Female euthymic mice, however, were more susceptible than male athymic mice, and splenectomised athymic males were more susceptible than non-splenectomised athymic males. F1 f...

Congenitally athymic nude mice and their heterozygous counterparts were inoculated intravaginally with the chlamydial agent of mouse pneumonitis, a Chlamydia trachomatis biovar. Heterozygous mice resolved their infections in 20 days, whereas nude mice developed chronic infections which lasted at least 265 days and did not resolve within the time course of the experiments. Heterozygous mice prod...