AI virus found in free range flocks

Free range flocks on two farms near Dereham in Norfolk have tested positive for avian influenza. Preliminary results indicate the same H7N3 virus which was confirmed in a flock of broiler breeders earlier this week. The Veterinary Laboratories Agency is now conducting further tests.

The two free range flocks will be slaughtered on suspicion of an avian notifiable disease and a restricted zone has been put in place extending 1km from each of the infected premises. The State Veterinary Service is tracing movements and contacts and Defra says the necessary surveillance and all appropriate worker protection measures have been put in place.

Debby Reynolds, chief veterinary officer said: “We still can not say whether either of these two further farms are the index case, further premises may be involved. We are investigating whether there are any links or movements between the two suspect farms and the confirmed infected premises. The working hypothesis remains that the most likely source of the virus is from another premises or from wild birds.”

Restrictions with the zone apply to the movement of poultry, poultry products and eggs, while additional biosecurity measures must be taken. However, poultry keepers within the zone will not be asked to house their birds, says Defra.