| seroprevalence of babesia ovis in sheep in catalonia, northeastern spain. | an indirect fluorescent antibody test (ifat) was developed in order to detect antibodies against babesia ovis in different sheep flocks from catalonia, northeastern spain. of the total 2174 sera included in the study, 133 (6.1%) were positive. considerable differences in seroprevalence were detected depending on the geographical areas from which the animals originated. this must have been a consequence of the presence or absence of the vector tick, rhipicephalus bursa, the distribution of which ... | 1998 | 9831951 |