Prevalence of Toxoplasma antibodies in rhesus monkeys in India

A serological survey of Toxoplasma antibodies prevalent in rhesus monkeys in India using an indirect haemagglutination test is reported. Of 94 monkeys 56.4 percent were positive to an antibody titre of 1:8 or more, 28.7 percent to a titre of 1.32 or more, while 17 percent showed a positivity level of 1:128 or more. The significance of these findings is discussed.

Oral immunization with L-forms of Vibrio cholerae in human volunteers

Oral administration of heat-inactivated lysates of Vibrio cholerae Ogawa L-forms elicited significantly high coproantibody, serum indirect hemagglutinating antibody, and vibriocidal antibody responses in human volunteers, against both homologous and heterologous subtypes of V. cholerae and V. El Tor. Five oral biweekly doses produced an adequate antibody response which persisted for at least 6 weeks after immunization. No untoward side effects were seen.