This study was aimed to investigate the effect of Theileria lestoquardi on the reproductive performance of Sudanese desert ewes. Thirty ewes were divided into three groups (A, B and C) of 10 each subjected to estrous synchronization and hand mating. Group A was infected before mating, group B was infected 2-3 months after conception and group C remained as uninfected control. Conception rate was found to be 11.1% in the first mating, and increased to 33.3% and 44.4% in the second and third mating for group A, GC reached 90%. In GB, three ewes aborted 20 days post infection. In GA the gestation period was two weeks shorter, body weight of the newly born lambs was reduced 30% and the mortality rate was 50%. All infected group revealed a delay in the first progesterone rise after delivery. Generally the infection of Theileria lestoquardi was highly affects the reproductive performance.
Theileria lestoquardi; sheep; ovarian activity; progesterone; conception