Saturday, September 16, 2017
free range farms are not an avian flu risk
Genuine low-density free range farms do not increase the risk of outbreaks of avian influenza. A leading poultry vet has said that the two most recent outbreaks in Australia were on intensive farms with high stocking densities. In an article by Dr George Arzey in the January Poultry Digest,he said that the two outbreaks in New South Wales in 2012 and 2013 were in intensive 'free range' flocks of 50,000 hens and 160,000. “The transformation of avian influenza viruses to highly pathogenic viruses is more likely in large flocks,” he said.In earlier published work he said "It is apparent from studies that differences in the disease profile of hens in different housing systems may be encountered and that viral respiratory diseases are less likely to be encountered in small free range flocks than in intensive flocks.