Isolation of human serum resistant Trypanozoon from cattle in Nigeria.

Four trypanosome stocks of the subgenus Trypanozoon were isolated from a herd of cattle in the Jos Plateau of Nigerian during a study on the epizootiology of trypanosomiasis. One of the stocks was repeatedly highly resistant to normal human serum (Blood Incubation Infectivity Test), indicating potential human infectivity. These observations suggest that the domestic cattle might act as reservoir hosts for the causative agent of human trypanosomiasis.