Table 1. Virologic results for local farm chickens positive for avian influenza A(H3N8) virus under active surveillance, Hong Kong, China*.
| Farm | Date sample collected | No. vials | No. (%) positive by RT-PCR |
No. (%) positive by virus isolation |
|||
|---|---|---|---|---|---|---|---|
| H9 | H3 | H9 | H3 | ||||
| A |
2021 Dec 14 |
10 |
0 |
6 (60) |
|
0 |
6 (60) |
| B |
2022 Dec 28 | 10 | 0 | 6 (60) | 0 | 3 (30) | |
| 2022 Feb 21 | 10 | 0 | 0 | 0 | 1 (10) | ||
| 2022 Mar 7 | 10 | 0 | 6 (60) | 0 | 5 (50) | ||
| 2022 Mar 21 |
10 |
0 |
1 (10) |
|
0 |
1 (10) |
|
| C |
2022 Jan 12 |
10 |
0 |
6 (60) |
|
0 |
6 (60) |
| D | 2022 Jan 21 | 10 | 0 | 6 (60) | 0 | 6 (60) | |
*No other influenza virus subtypes were detected. RT-PCR, reverse transcription PCR.