“…Being present for only 24 h before death means that it could not have caused the anaemia which was regenerative. Levine et al (1956) and Herbert (1964) suggest that stressed animals or those with a concurrent disease may be more likely to exhibit a high infection of T. theileri. The large numbers of trypanosomes seen in o u r case could have resulted from immunosuppressive effects of another undiagnosed disease coupled with the stress of pregnancy.…”