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Journal of Wildlife Diseases, 44(2), 2008, pp. 434-439
© Wildlife Disease Association  2008
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SHORT COMMUNICATION

Avian Influenza Surveillance in Hunter-harvested Waterfowl from the Gulf Coast of Texas (November 2005–January 2006)

 Pamela J. Ferro1, John El-Attrache1,2, Xingwang Fang2, Susan N. Rollo3, Adam Jester4, Todd Merendino5, Markus J. Peterson6 and Blanca Lupiani1,4,7

1 Texas A&M University, Department of Veterinary Pathobiology, 4467 TAMU, College Station, Texas 77843-4467, USA
2 Ambion Inc., 2130 Woodward St., Austin, Texas 78744, USA
3 Texas A&M University, Department of Veterinary Integrative Biosciences, College Station, Texas 77843-2128
4 Texas A&M University, Department of Poultry Science, Kleberg Center, College Station, Texas 77843-2472, USA
5 Texas Parks and Wildlife Department, 1700 7th street, Bay City, Texas 77414, USA
6 Texas A&M University, Department of Wildlife and Fisheries Sciences, College Station, TX 77843-2258
7 Corresponding author (email: blupiani{at}cvm.tamu.edu)

ABSTRACT:   The objectives of our study were to determine prevalence of avian influenza viruses (AIV) on wintering grounds on the Texas Gulf Coast, USA, and to compare real-time reverse-transcriptase polymerase chain reaction (rRT-PCR) and virus isolation for detection of AIV in cloacal swabs from wild waterfowl. Cloacal swabs were collected from hunter-harvested waterfowl from November 2005 to January 2006 at four wildlife management areas. Seven AIV were isolated from four species of ducks: Green-winged Teal (Anas crecca) in November; Blue-winged Teal (Anas discors) in November; Mottled Duck (Anas fulvigula) in December, and Northern Shoveler (Anas clypeata) in January. Prevalence of AIV for each of these species during the sampling period was 1.4, 2, 6, and 0.6%, respectively. The AIV subtypes detected were H1N2, H1N4, H4N6, H6N2, and H10N7, all previously reported in North American waterfowl. Our study identified AIV subtypes not previously reported on the Texas Gulf Coast and provides baseline data for a multiyear surveillance project.
  Key words:  Avian influenza, ducks, surveillance, Texas, waterfowl, wintering grounds.




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