Table 2. AIV subtypes detected by qRT-PCR from swabs of chicken carcasses sold at live poultry markets and from chilled poultry supplied through slaughtering industries, Guangzhou, Guangdong Province, China, June–December 2016*.
| Subtype |
Wholesale market |
|
Retail markets |
|
Supermarket | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| OP |
Cloacal |
Visceral cavity |
OP |
Cloacal |
Visceral cavity |
OP |
Cloacal |
Visceral cavity |
|||
| H9 | 58/67 (86.6) | 39/55 (70.9) | 32/48 (66.7) | 166/207 (80.2) | 143/177 (80.8) | 131/203 (64.5) | 0/2 | 1/4 (25.0) | 0/2 | ||
| H5 | 0/67 | 0/55 | 0/48 | 2/207 (1.0) | 1/177 (0.6) | 4/203 (2.0) | 0/2 | 0/4 | 0/2 | ||
| H7 | 0/67 | 0/55 | 2/48 (4.2) | 0/207 | 0/177 | 2/203 (1.0) | 0/2 | 0/4 | 0/2 | ||
| H5+H9 | 0/67 | 0/55 | 0/48 | 4/207 (1.9) | 6/177 (3.4) | 5/203 (2.5) | 0/2 | 0/4 | 0/2 | ||
| H7+H9 | 2/67 (3.0) | 3/55 (5.5) | 2/48 (4.2) | 13/207 (6.3) | 6/177 (3.4) | 10/203 (5.0) | 0/2 | 0/4 | 0/2 | ||
| H5+H7+H9 | 0/67 | 0/55 | 0/48 | 3/207 (1.5) | 5/177 (2.8) | 7/203 (3.5) | 0/2 | 0/4 | 0/2 | ||
| Non-H5/H7/H9 | 4/67 (6.0) | 3/55 (5.5) | 1/48 (2.1) | 10/207 (4.8) | 7/177 (4.0) | 27/203 (13.3) | 0/2 | 1/4 (25.0) | 1/2 (50.0) | ||
| Low copy (nontypeable)† | 3/67 (4.5) | 10/55 (18.2) | 11/48 (22.9) | 9/207 (4.4) | 9/177 (5.1) | 17/203 (8.4) | 2/2 (100.0) | 2/4 (50.0) | 1/2 (50.0) | ||
*Values are no. positive/no. tested (%). AIV, avian influenza virus; OP, oropharyngeal; qRT-PCR, quantitative real-time reverse transcription PCR. †Samples with matrix gene copy below linear range of quantification (2.903 log10 matrix gene copies/mL) and are negative for H5/H7/H9 by qRT-PCR.