Percentage of swab samples from hosts that tested positive for influenza A.

*Primary species at each site. Species other than the primary species may have been sampled. Ck = Chicken, Dk = Duck, Pn = Pigeon.†Percentage of cloacal and oropharyngeal swabs, or total hosts that tested positive. The number of tested swabs is listed in parentheses. The total percentage testing positive refers to individual birds regardless of the type of swab sample. C = Cloacal swab, OP = Oropharyngeal swab.‡Prevalence for the oropharyngeal swab was significantly higher (P