Table A3. Apparent prevalence of avian influenza virus in various waterfowl and wetland-associated game bird species as determined by VI and real-time RT-PCR from cloacal swabs collected from hunter-harvested waterfowl, Texas mid–Gulf Coast, USA, September 2008–January 2009*.

Species	No. tested	Real-time RT-PCR,† no. (%)	VI,† no. (%)	Isolate‡
American wigeon (Anas americana)	16	1 (6.3)	0	–
Northern pintail (A. acuta)	28	2 (7.1)	1 (3.6)	H4N6
Northern shoveler (A. clypeata)	104	5 (4.8)	1 (1.0)	H7N2
Teal, blue-winged (A. discors)	176	21 (11.9)	3 (1.7)	H4N6, H4N8 (2)
Teal, green-winged (A. crecca)	314	13 (4.1)	0	–
Total§	768	42 (5.5)	5 (0.7)	–

*VI, virus isolation; RT-PCR, reverse transcription–PCR.
†Number positive (apparent prevalence).
‡Isolates typed by the National Veterinary Services Laboratory.
§Other species sampled that were negative for AI by RT-PCR and VI, number sampled: Common ground dove (Columbina passerina), 1; Gadwall (Anas strepera), 30; Greater white-front goose (Anser albifrons), 6; Hooded merganser (Laphodytes cucullatus), 4; Lesser Scaup (Aythya affinis), 1; Mallard (Anas platyrhynchos), 4; Mottled duck (Anas fulvigla), 23; Mottled duck x Mallard hybrid (Anas fulvigula x Anas platyrhynchos), 1; Ring-necked duck (Aythya collaris), 1; Ross’s goose (Anser albifrons), 1; Sandhill crane (Grus candensis), 1; Snow goose (Chen eaerulescens), 56; and Wood duck (Aix sponsa), 1.