Volume 13, Number 9—September 2007
Dispatch
Poultry Drinking Water Used for Avian Influenza Surveillance
Y.H. Connie Leung*, Li-Juan Zhang*, Chun-Kin Chow*, Chun-Lok Tsang*, Chi-Fung Ng*, Chun-Kuen Wong*, Yi Guan*1, and J.S. Malik Peiris*1
Table 1
Avian influenza (H9N2) virus in chickens (August 2004–July 2005) and minor poultry (August 2004–November 2006)*
| Species | No. pos/no. tested (% pos) |
|||
|---|---|---|---|---|
| Overall isolation rate | Feces only | Drinking water only | Feces and drinking water | |
| Chicken | 207/2,503 (8.3) | 24/2,503 (1.0) | 174/2,503 (7.0) | 9/2,503 (0.4) |
| Minor poultry | ||||
| Silkie chicken | 10/171 (5.8) | 0/171 (0) | 9/171 (5.3) | 1/171 (0.6) |
| Guinea fowl | 1/13 (7.7) | 1/13 (7.7) | 0/13 (0) | 0/13 (0) |
| Pigeon | 6/158 (3.8) | 0/158 (0) | 6/158 (3.8) | 0/158 (0) |
| Chukar | 1/23 (4.3) | 1/23 (4.3) | 0/23 (0) | 0/23 (0) |
| Pheasant | 10/48 (20.8) | 2/48 (4.2) | 7/48 (14.6) | 1/48 (2.1) |
*Pos, positive for avian influenza (H9N2) virus.
