Oncospheres of Taenia solium and T-Saginata asiatica develop into metacestodes in normal and immunosuppressed mice

Normal and immunosuppressed mice were infected with oncospheres of Taenia s aginata asiatica and T. solium. Although normal ICR mice were not susceptib le to these two parasites, cysticerci were recovered from the immunosuppres sed ones following venous injection. For T, s, asiatica, immunosuppressed I CR mice had an infection rate of 12.5% and six cysticerci of this parasite were recovered from three males. After injection of T. solium oncospheres, a high infection rate of 57% was obtained and 23 cysticerci were collected from 13 male immunosuppressed ICR mice. The immunosuppressed C57 mice had t he highest infection rate (100%) and cysticercus recovery rate (2.4%) for T . solium. The infection rate and cysticercus recovery rate in six normal C5 7 mice were 40% and 3% respectively. The immunosuppressed ICR, Balb/c and C 3H mice were also susceptible to T. s. asiatica.