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Influenza A Outbreaks in Minnesota Turkeys Due to Subtype H10N7 and Possible Transmission by Waterfowl

Daniel Karunakaran, Virginia Hinshaw, Peter Poss, John Newman and David Halvorson
Avian Diseases
Vol. 27, No. 2 (Apr. - Jun., 1983), pp. 357-366
DOI: 10.2307/1590162
Stable URL: http://www.jstor.org/stable/1590162
Page Count: 10
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Abstract

Avian influenza outbreaks in Minnesota involving the H10N7 subtype occurred on two turkey farms in 1979 and on a third in 1980. The H10N7 (Hav2 Neq1) subtype had not previously been detected in turkeys in Minnesota or reported in the United States. The clinical signs ranged from severe, with a mortality rate as high as 31%, to subclinical. Antigenically indistinguishable viruses were isolated from healthy mallards on a pond adjacent to the turkey farms, suggesting that the virus responsible for the outbreak may have been introduced by feral ducks.

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