Volume 16, Number 8—August 2010
Research
Multiyear Surveillance for Avian Influenza Virus in Waterfowl from Wintering Grounds, Texas Coast, USA
Pamela J. Ferro, Christine M. Budke, Markus J. Peterson, Dayna Cox, Emily Roltsch, Todd Merendino1, Matt Nelson, and Blanca Lupiani
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.
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