Seroprevalence of Anaplasma phagocytophilum among Healthy Dogs and Horses in Israel
2006
Levi, O. | Waner, T. | Baneth, G. | Keysary, A. | Bruchim, Y. | Silverman, J. | Harrus, S.
The presence of reacting antibodies to Anaplasma phagocytophilum has previously been demonstrated in Israel, both in humans and the golden jackal (Canis aureus syriacus). This study was undertaken to determine the seroprevalence of A. phagocytophilum antibodies in two additional potential hosts, domestic dogs and horses in order to investigate the possibility of exposure to the organism in Israel. Of 195 dogs tested, 9% were seroreactive with A. phagocytophilum antigen and 30% were seroreactive to Ehrlichia canis. Twenty-nine percent of the dogs seropositive for E. canis were also reactive to A. phagocytophilum. Two dogs had immunofluoresence antibody (IFA) antibody titres for A. phagocytophilum greater than E. canis. The equine serological survey (n = 300) revealed no seroreactive horses. The results presented in this study suggest that dogs in Israel could have been accidentally exposed to A. phagocytophilum, for example by ticks carried on migrating birds, however, the possibility of cross-reaction with E. canis should also be considered. In spite of the high prevalence of ticks on horses in Israel during the summer months, no evidence for exposure to A. phagocytophilum was apparent.
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