Percentage of surveillance samples 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, Pt = Pet birds.†Consists of fecal collections and samples from water troughs, standing water, and fecal digesters. Sample size is listed in parentheses.‡Reported as % positive for either a cloacal or oropharyngeal swab. Number of hosts that were tested is listed in parentheses.§Total number of samples tested irrespective of sample type. Sample size is listed in parentheses.a–dResults of sequential proportions tests on the sampling sites in Dhaka. Atleast 1 positive sample was required for to site to be included in the analysis. Significant differences were not found between values with the same letter (P>0.05), but values with different letters were found to be significantly different (P