Table 4 Number of sequences (%) of hemagglutinin and neuraminidase influenza A virus gene segments obtained directly from the samples by sample type, type of farm and sequence length
Sample type | BREEDING HERDS | WEAN-TO-FINISH HERDS | ||||||
|---|---|---|---|---|---|---|---|---|
Hemagglutinin | Neuraminidase | Hemagglutinin | Neuraminidase | |||||
< 900 bpb | > 900 bp | < 800 bp | > 800 bp | < 900 bp | > 900 bp | < 800 bp | > 800 bp | |
Nasal swab | 2/54 (3.7)a | 9/54 (16.6) | 0/54 (0) | 11/54 (20.4) | 2/42 (4.8) | 5/42 (11.9) | 3/42 (7.1) | 4/42 (9.5) |
Nasal wipe | 1/57 (1.8) | 12/57 (21) | 0/57 (0) | 11/57 (19.3) | 1/51 (1.9) | 5/51 (9.8) | 1/51 (1.9) | 4/51 (7.8) |
Oropharyngeal swab | 0/51 (0) | 7/51 (13.7) | 2/51 (3.9) | 7/51 (13.7) | NCc | NC | NC | NC |
Oral fluid | 0/6 (0) | 0/6 (0) | 1/6 (16.7) | 0/6 (0) | 0/20 (0) | 0/20 (0) | 0/20 (0) | 0/20 (0) |
Surface wipe | 1/21(4.8) | 2/21(9.5) | 0/20(0) | 0/20 (0) | 0/24 (0) | 1/24 (4.2) | 0/24 (0) | 0/24 (0) |
Udder wipe | 1/24 (4.1) | 3/24 (12.5) | 0/24 (0) | 2/24 (8.3) | NC | NC | NC | NC |
Airborne particle deposition | 2/24 (8.3) | 3/24 (12.5) | 1/22 (4.5) | 1/22 (4.5) | 0/21 (0) | 0/21 (0) | 0/20 (0) | 0/20 (0) |
Air | 0/26 (0) | 0/26 (0) | 0/26 (0) | 0/26 (0) | 0/19 (0) | 0/19 (0) | 0/19 (0) | 0/19 (0) |
Total | 7/263 (2.7) | 36/263 (13.7) | 4/260 (1.5) | 32/260 (12.3) | 3/177 (1.7) | 11/177 (6.2) | 4/177 (2.3) | 8/177 (4.5) |