الفهرس 
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Abstract
This study was carried out on 1143 cattle, 1143 blood smear from ear vein examined microscopically for detection of Babesia or Theileria merozoites, 184 serum samples examined by indirect ELISA for detection of antibodies against piroplasms and 50 blood samples were examined using peR. The prevalence of Babesia in Giza govemorate using blood film examination was 4.19 % with the highest prevalence during summer season (5.7%) followed by autumn (4.96%), spring (3.38%) and winter (1.96%) while the prevalence of Theileria in Giza govemorate using blood film examination as 5.94 % with the highest prevalence during summer season (7.14 %) followed by autumn (6.62 %), spring (5.9 %) and winter (3.52 %). Results of ELlS A were recorded as 42.93% positive against B. bigemina, 33.69 % were positive against T. mutans, 19.02 % were positive against T. parva, while 46.2% were positive against T. annulata. Mixed seropositivity was recorded using ELISA between Theileria spp and between Babesia and Theileria. Antibodies were recorded against Theileria parva using indirect ELISA with prevalence of 19.02% and T. parva antigen was recorded for the first time in Egypt using peR with prevalence of 6 %. The major vectors of babesiosis and theileriosis in cattle in Egypt recorded in this study were Boophilus annulatus, Hyalomma anatolicum anatolicum and Rhipicephilus turanicus. Hematological parameters were evaluated in cattle affected with babesiosis and theileriosis, they were lower than that of normal animals. Treatment trial was carried out on cows naturally infected with babesiosis one group treated with Imidocarb dipropionate at dose of 1.2 mg! kg. B. wt I1M. another group treated with Diminazine aceturate at dose of 4 mg!kg.B.wt I1M, a group on cattle naturally infected with theileriosis were treated with Buparvaquone. Parasitemia and anemia were evaluated before treatment and two weeks after treatment and compared with untreated control group.