Abstract
We report serologic evidence of avian influenza infection in 1 duck hunter and 2 wildlife professionals with extensive histories of wild waterfowl and game bird exposure. Two laboratory methods showed evidence of past infection with influenza A/H11N9, a less common virus strain in wild ducks, in these 3 persons.
Highlights
Wild ducks, geese, and shorebirds are the natural reservoir for influenza A virus [1]; all 16 hemagglutinin (H) and 9 neuraminidase (N) subtypes are found in these wild birds [1,2]
Ten (15%) of the 68 Department of Natural Resources (DNR) workers reported no contact with ducks
In the 3 years before the study, influenza vaccine had been administered to 37% of the duck hunters and 35% of the DNR workers
Summary
Geese, and shorebirds are the natural reservoir for influenza A virus [1]; all 16 hemagglutinin (H) and 9 neuraminidase (N) subtypes are found in these wild birds [1,2]. The average number of years of waterfowl or bird exposure of the duck hunters and DNR workers was 19.8 and 21.5, respectively. In the 3 years before the study, influenza vaccine had been administered to 37% of the duck hunters and 35% of the DNR workers.
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