Survey of pathogens and blood parasites in free-living passerines.

To determine the disease prevalence of free-living passerines, 1709 passerines were sampled from 38 different field sites in Ohio. Choanal and cloacal swabs were collected from each bird and cultured for the presence of Pasteurella multocida, Salmonella spp., and Escherichia coli by standard microbiologic techniques. In addition, the serum from each bird was analyzed for the presence of antibodies to Mycoplasma gallisepticum, Mycoplasma synoviae, Newcastle disease virus, and avian influenza virus. A blood smear was also made to examine for the presence of blood parasites. Results indicated that the isolation of E. coli varied with bird species, with the European starling having a higher (21.4%) isolation of E. coli. Salmonella spp. were also isolated from these free-living passerines. Pasteurella multocida was not isolated from any of the sampled passerines. These birds did not have antibodies to M. gallisepticum, M. synoviae, Newcastle disease virus, or avian influenza virus. Blood parasites were not detected in any of the birds sampled.

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