| epizootiology of avian influenza--simultaneous monitoring of sentinel ducks and turkeys in minnesota. | isolation-reared mallards (anas platyrhynchos) were placed on ponds in turkey-rearing areas in minnesota, and their cloacae were periodically swabbed to attempt isolating virus from embryonated chicken eggs. nearby turkeys were sampled by taking cloacal and tracheal swabs as well as blood samples. hemagglutinating viruses were identified at the national veterinary services laboratory, u.s. department of agriculture, ames, iowa. during this two-year study, the weekly influenza virus-isolation rat ... | 1983 | 6847552 |