Table 1. Subtypes of avian influenza viruses isolated in the fall (September and November) from selected species during 3 consecutive hunting seasons, Texas mid–Gulf Coast, USA, 2006–07, 2007–08, and 2008–09.
| Species* | Subtype (no. isolated) |
||||||
|---|---|---|---|---|---|---|---|
| September† |
November |
||||||
| 2006 | 2007 | 2008 | 2006 | 2007 | 2008 | ||
| Fulvous whistling duck (Dendrocygna bicolor) | – | – | – | H6N1 | – | – | |
| Mottled duck × mallard (Anas fulvigula × A. platyrhynchos) | – | – | – | – | H6N8 | – | |
| Mottled duck (A. fulvigula) | – | – | – | H6N5 | – | – | |
| Northern pintail (A. acuta) | – | – | – | – | H4N8 | – | |
| Northern shoveler (A. clypeata) | – | – | – | H2N9, H3N8, H4N2, H4N6, H4N8 | H4N2, H5N2, H5N3, H6N2, H10N2, H11N9 (2) | H7N2 | |
| Teal, blue-winged (A. discors) | H1N1, H3N6, H3N8 (6) | H1N1 (2), H2N8, H3N4, H3N6, H3N8 (9), H4N1, H4N6 (17), H4N8 (6), H6N1, H7N1, H7N1/4, H7N7 (2), H10N7 (5) | H4N6, H4N8 | H2N9, H4N2 H4N6, H4N8 H6N1 (3), H6N1/4, H6N5, H6N6, H6N8 | H3N6, H5N2 (2), H5N3 (2), H7N4, H7N7 (3), H10N7, H11N9 (3) | H4N8 | |
| Teal, green-winged (A. crecca) | H6N2 | H10N7 | – | H1N1 | H5N2, H7N1/4, H11N9 | – | |
*Species selected by significance as determined by prevalence, uniqueness to the area, or native, nonmigratory species. †Teal are the only species hunted during September on the Texas mid–Gulf coast.