Seroprevalence of Anaplasma phagocytophilum, Ehrlichia spp. and Borrelia burgdorferi infections in horses: first report from Northern Bulgaria – Short communication

Tsachev, Ilia and Baymakova, Magdalena and Pantchev, Nikola (2019) Seroprevalence of Anaplasma phagocytophilum, Ehrlichia spp. and Borrelia burgdorferi infections in horses: first report from Northern Bulgaria – Short communication. Acta Veterinaria Hungarica, 67 (2). pp. 197-203. ISSN 0236-6290

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Abstract

Lyme borreliosis, granulocytic anaplasmosis and monocytic ehrlichiosis are well studied in humans and dogs. In horses, these diseases are not widely investigated and limited information is available about their occurrence. The purpose of this study was to present the first ELISA-based report on the seroprevalence of Anaplasma phagocytophilum, Ehrlichia spp. and Borrelia burgdorferi in horses from Northern Bulgaria. A total of 192 horses were investigated from three regions in Northern Bulgaria (Northwestern, North-Central and Northeastern Bulgaria). All equine sera were tested for A. phagocytophilum, Ehrlichia spp. and B. burgdorferi antibodies by a commercial rapid ELISA test. Antibodies against A. phagocytophilum were found in all the three regions at a mean frequency of 12% (23/192), ranging from 9.38 to 15.63% by region. Antibodies against Ehrlichia spp. were found in horses from one region (Northeastern) at a rate of 0.5% (1/192). Anti-B. burgdorferi antibodies were detected in all the three regions with a mean frequency of 15.1% (29/192), ranging from 14.06 to 17.19% by region. A co-exposure to A. phagocytophilum and B. burgdorferi was observed in 6.3% of the cases (12/192). This is the first report on the natural exposure of horses to these bacteria (A. phagocytophilum, Ehrlichia spp. and B. burgdorferi) in Northern Bulgaria.

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