Table 1. Percentages of stranded seals tested that were infected by HPAI A(H5N1) in the St. Lawrence Estuary, Quebec, Canada, April 22–October 6, 2022*.
| Species and sampling | % Infected (no. infected†/no. tested) |
|---|---|
| Harbor seal (Phoca vitulina) | |
| Full postmortem examination | 64 (14/22) |
| Nasal/rectal field swab | 55 (6/11) |
| Total |
61 (20/33) |
| Grey seal (Halichoerus grypus) | |
| Full postmortem examination | 33 (1/3) |
| Nasal/rectal field swab | 0 (0/1) |
| Total |
25 (1/4) |
| Hooded seal (Cystophora cristata) | |
| Full postmortem examination |
0 (0/1) |
| Harp seal (Pagophilus groenlandicus) | |
| Full postmortem examination |
0 (0/1) |
| Total pinnipeds | |
| Full postmortem examination | 56 (15/27) |
| Nasal/rectal field swab | 50 (6/12) |
| Total | 54 (21/39) |
*Postmortem and field swab samples were from different individual strandings. HPAI, highly pathogenic avian influenza. †Infections were determined on the basis of epidemiologic data, presence of suggestive lesions, and PCR testing using H5-specific primers.