A survey was undertaken to assess the prevalence of Theileria equi and Anaplasma phagocytophilum in some regions of Ukraine, Poland and Slovakia. Using a specific PCR assays, blood samples from 215 horses were tested. The prevalence of T. equi and A. phagocytophilum infection was 13.95% and 1.4%, respectively. BLAST analysis showed the isolates closest to the T. equi 18S rRNA and A. phagocytophilum msp4 gene sequences in GenBank with a similarity of ≥99%. No significant association was found between the T. equi PCR positivity and the age or sex of the horses. There was a significant association between the origin of horses and T. equi-PCR positivity. No significant association was found between the A. phagocytophilum-PCR positivity and the age, sex or origin.
Keywords: Anaplasma phagocytophilum; Horse; Poland; Slovakia; Theileria equi; Ukraine.
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