State officials have confirmed two more instances of a deadly and highly contagious avian influenza in commercial poultry facilities in Iowa — one of them a 1.5 million flock of egg-laying chickens in Guthrie County — according to the Iowa Department of Agriculture and Land Stewardship.
“You can see a scenario where this could get worse as we go through the spring,” Mike Naig, the state’s secretary of agriculture, said in a call with reporters.
Basically, the state is at the whim of infected migratory birds that are passing through and can be asymptomatic. The first confirmation of a highly pathogenic avian influenza in Iowa this year was March 1 in a small backyard flock in Pottawattamie County.
That was about six weeks earlier than the first detection of 2015, when an avian flu outbreak led to the culling of more than 32 million birds in Iowa over the course of about two months.
About a month has elapsed since the first detection this year, and Naig cautioned that the migration — and threat of new infections — might last for another two months. Infected birds can transmit the virus through their feces or their oral and nasal secretions. Officials suspect the virus is carried into bird facilities by workers, food or other items that have come into contact with it.
So far, the virus has been found in nine Iowa commercial and backyard flocks with a total of about 8.1 million birds. On Monday, the state identified the virus in the large Guthrie flock and in a Hamilton County flock of about 28,000 turkeys.
The virus is unlikely to infect humans, and meat and eggs of infected birds are destroyed.
State officials are unaware of any instances this year of the virus being transmitted from one flock to another, which accounted for a “significant portion” of 2015 infections, said Chloe Carson, a spokesperson for the state ag department. The department seeks to prevent those flock-to-flock transmissions by culling infected flocks within 24 hours of detection and with on-site disposal of the carcasses through burial or composting.
“This is something we think is absolutely critical,” State Veterinarian Jeff Kaisand said.
Iowa is particularly vulnerable to the virus because of its large flocks. This year, Iowa has about half the number of detections of South Dakota — which had 17 as of March 27 — but the number of birds that have been destroyed in Iowa is 10 times that of South Dakota, according to the U.S. Department of Agriculture.
The USDA sent an incident management team to Iowa to assist with virus detection and containment, Naig said.
“It’s a difficult time for poultry producers,” he said. “Not just those that have an infected site. It affects all poultry producers because, of course, they are on high alert.”
