| influenza a outbreaks in minnesota turkeys due to subtype h10n7 and possible transmission by waterfowl. | 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 ... | 1983 | 6870718 |
| influenza-a viruses in ducks in northwestern minnesota: fine scale spatial and temporal variation in prevalence and subtype diversity. | waterfowl from northwestern minnesota were sampled by cloacal swabbing for avian influenza virus (aiv) from july-october in 2007 and 2008. aiv was detected in 222 (9.1%) of 2,441 ducks in 2007 and in 438 (17.9%) of 2,452 ducks in 2008. prevalence of aiv peaked in late summer. we detected 27 aiv subtypes during 2007 and 31 during 2008. ten hemagglutinin (ha) subtypes were detected each year (i.e., h1, 3-8, and 10-12 during 2007; h1-8, 10 and 11 during 2008). all neuraminidase (na) subtypes were d ... | 2011 | 21931636 |