University of Khartoum

Investigation of Theileria lestoquardi Infection among Sheep and Goats in Nyala Town, South Darfur State, Sudan

Investigation of Theileria lestoquardi Infection among Sheep and Goats in Nyala Town, South Darfur State, Sudan

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Title: Investigation of Theileria lestoquardi Infection among Sheep and Goats in Nyala Town, South Darfur State, Sudan
Author: Osman, Tagua Mohamed Ibrahim
Abstract: The study was conducted in Nyala Town, South Darfur State to investigate ovine and caprine theileriosis. Samples were collected during August and September 2015 from local breeds (desert breeds) and crosses (Saanen and Guprus), and of different age groups and sex. Three age groups of sheep and goats were included: group one less than one year old, group two one year to two years old and group three older than two years. Two diagnostic techniques were used, blood smears, and indirect fluorescent antibody IFA test. Identification of ticks on sheep and goat was also carried out. A total of 150 blood samples were collected for blood smears, serum. Hard ticks infesting animals were also collected. The samples were parasitologically examined using Giemsa's stained blood smears (BS). Serum samples were analyzed using (IFA) test .Data were analyzed using statistical package for social sciences (SPSS). Out of 150 samples, 9 (6%) were positive for Theileria spp. piroplasms in the blood smears, 81(54%) were positive for Theileria lestoquardi antibodies. Out of 61 sheep 3 (4.9%) were positive for Theileria spp. piroplasms, 25 (41%) were positive for T. lestoquardi antibodies. Out of 89 goats 6 (6.7%) were positive for Theileria spp. piroplasms, 56 (62.9%) were positive for T. lestoquardi antibodies. The highest prevalence of Theileria spp. piroplasms and T. lestoquardi antibodies was recorded among sheep older than 2 years using the two diagnostic techniques. Two genera and four species of hard ticks were found infesting sheep and goats. These included Rhipicephalus e. evertsi, R. s. sanguineus, Amblyommavariegatum and A. lepidum. This is the first investigation of T. lestoquardi antibodies in sheep and goats in Nyala Town. Seropositivity of these animals implies that malignant ovine theileriosis (MOT) possible in Nyala Town and must be considered in rearing of small ruminants and introduction from MOT non-endemic areas. Vectors other than H. anatolicum need to be investigated particularly on sheep and goats that were found free of H. anatolicum despite their seropositivity,
URI: http://khartoumspace.uofk.edu/123456789/25008


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