| seroconversion to avian influenza virus in free-range chickens in the riverland region of victoria. | since 2005, h5n1 avian influenza (ai) has spread from south-east asia to over 60 different countries, resulting in the direct death or slaughter of over 250,000,000 poultry. migratory waterfowl have been implicated in this spread and in australia there have been numerous isolations of low-pathogenicity ai virus from wild waterfowl and shorebirds. the department of human services, victoria maintains 10 sentinel free-range chicken flocks in the riverland at locations that are populated by large nu ... | 2010 | 20633162 |