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    Determination of the prevalence and parasite burden of Coeunurus cerebralis and Oestrus ovis in sheep in Siirt province of Türkiye
    (University of Veterinary Sciences Brno, 2025) Murat Kara; Burcak Aslan Çelik; Ozgur Yasar Celik; Adnan Ayan; Muhammed Ahmed Selcuk; Kerem Ercan; Ozge Oktay Ayan
    The aim of this study was to determine the prevalence and parasite burdens of Coeunurus cerebralis and Oestrus ovis in sheep in Siirt province, Türkiye. Between December 2022 and November 2023, a total of 520 sheep (260 male, 260 female) heads (10 heads per week) were randomly sampled from a butcher. The total prevalence of C. cerebralis was determined to be 12.9%. The prevalence was higher in males, in the Morkaraman breed, in animals younger than two years of age, in dark-coloured ones, in October, and in the right brain hemisphere. The total prevalence of O. ovis was determined to be 38.3%. The prevalence was higher in females, in the Akkaraman breed, in dark-coloured breeds, in age groups older than two years, and in December. In terms of larvae, L1 was detected in 108 sheep, L2 in 106 sheep, and L3 in 139 sheep. A total of 1,039 larvae (278 L1, 321 L2, and 440 L3) were detected. The significant presence of O. ovis found in the sheep in this study indicates that Siirt province has suitable climatic conditions for O. ovis and larval development. It is recommended to include more animals in a future study in order to determine the exact seasonal prevalence of O. ovis infestation in the region, and to use an antiparasitic drug effective against O. ovis in the routine treatment of sheep to reduce the incidence of this disease.
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    Molecular identification and phylogenetic analysis of Babesia ovis in sheep in Siirt, Türkiye: relationship with some oxidant/antioxidant parameters
    (University of Veterinary Sciences Brno, 2024) Burçak Aslan Çelik; Murat Kara; Özgür Yaşar Çelik; Kıvanç İrak; Muhammed Ahmed Selçuk; Kerem Ercan; Adnan Ayan
    The Babesia genus includes tick-borne haemoprotozoan parasites that infect a wide variety of vertebrate hosts, both domestic and wild, around the world. Babesia spp. cause oxidative stress by increasing the number of free radicals in erythrocytes. Among this genus, Babesia ovis causes babesiosis in sheep and goats, especially in tropical and subtropical regions, causing significant economic losses. In this study, we aimed to determine the presence and prevalence of B. ovis in sheep in Siirt province, T & uuml;rkiye, using molecular method and to evaluate some oxidant/ antioxidant parameters in infected sheep. The animal material used in this study consisted of a total of 500 sheep. DNA extraction, Polymerase Chain Reaction (PCR) amplification and sequence analysis of blood samples and Enzyme-Linked ImmunoSorbent Assay (ELISA) analysis of serum samples were performed. As a result of the study, 84 of the 500 samples (16.80%) examined were PCR positive. Advanced oxidation protein products (AOPP) and nitric oxide (NO) concentrations were found to be higher in sheep with babesiosis compared to the control group. Superoxide dismutase (SOD) activity was higher in the control group and catalase (CAT) activity was higher in infected sheep. As a result of this study, the presence of Babesia ovis was detected in all districts of Siirt province. It has been determined that infection caused by Babesia ovis in sheep causes oxidative stress as a result of increased nitric oxide and oxidized protein levels and this process may participate in the pathology of the disease.