Table 2. Subtypes of avian influenza viruses isolated in the winter (December–January) from selected species during 3 consecutive hunting seasons, Texas mid–Gulf Coast, USA, 2006–07, 2007–08, and 2008–
| Species* | Subtype (no. isolated) |
||||||
|---|---|---|---|---|---|---|---|
| December |
January |
||||||
| 2006 | 2007 | 2008 | 2007 | 2008 | 2009 | ||
| Northern pintail (Anas acuta) | – | H10N3/7 | H4N6 | – | H10N3 | – | |
| Northern shoveler (A. clypeata) | – | H5N2, H6N2, H10N7 | – | – | – | – | |
| Teal, blue-winged (A. discors) | – | – | – | – | H10N3 (3) | – | |
| Teal, green-winged (A. crecca) | H10N7, H11N3 | – | – | H7N3 | H7N3, H10N3 (2) | – | |
*Species selected by significance as determined by prevalence, uniqueness to the area, or native, nonmigratory species.