an outbreak of west nile virus-associated disease in domestic geese (anser anser domesticus) upon initial introduction to a geographic region, with evidence of bird to bird transmission.west nile virus activity in manitoba was documented for the first time by the collection of an infected crow found on july 8, 2002, in winnipeg. west nile virus was identified as the cause of death for a large number of domestic geese at a single farm in southern manitoba in august. of the 5 differently aged cohorts on the affected farm, which included 2 breeding flocks and 3 growing flocks, the 6-week-old cohort was most severely affected with 692 of 2731 goslings dying within a 10-day period. ...200415025147
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