prevalence of theileria spp. infection in sheep in south khorasan province, iran.the prevalence of theileria spp. infection was studied in sheep in the south khorasan province in iran from 2003 to 2004. a total of 840 sheep from 34 flocks were clinically examined and investigated for the presence of theileria spp. in the appropriate blood smears and any tick species on the body of the animals. in this study, 11.9% of sheep were infected with theileria spp., with a parasitemia of 0.02-0.1%. differences in the infection rates were statistically significant among different area ...200616730905
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