The new case confirmed by the US Department of Agriculture's Animal and Plant Health Inspection Service is:

• Iowa, Wright county - 1,000,000 commercial layer chickens.

The newly confirmed outbreak brings the total number of detections in the US to 223, affecting 48,091,293 birds.

Iowa has now reached 75 detections in total, with 31,723,300 birds affected.

Iowa's Department of Agriculture and Land Stewardship has also announced that depopulation has been completed of birds impacted by avian influenza at previously announced sites in the state.

A total of 35 turkey flocks with 1.14 million birds have had confirmed cases of the disease and have been depopulated and are currently being composted. Once composting is completed the facilities will be cleaned and disinfected. Environmental samplings of all sites will take place to confirm successful cleaning and disinfecting before restocking.

Depopulation of the previously announced commercial laying and pullet facilities was finished this past weekend. Iowa has had 35 previously announced laying and pullet facilities with 31.56 million birds that have had confirmed cases of the disease and have been depopulated.

Disposal of affected birds is ongoing. Composting, burial, incineration and landfills are all being used. Over 650 bio-secure boxes have been disposed via incineration or at one of the two currently approved landfills. Approximately 400 of the bio-secure boxes are still in need of disposal.

A USDA contractor is moving the materials and has 70 trucks in the state available to assist in the disposal. All trucks are cleaned and disinfected before the leave an infected premise and before leaving a disposal site.

In addition, six backyard flocks in the state with 4,679 birds have had confirmed cases of the disease and have been depopulated.

In Nebraska, one new unconfirmed case of HPAI has been announced this week. The flock, in Dixon county, was already being depopulated as it was epidemiologically connected with the other confirmed infected flocks in the county.

Another flock in Dixon county continues to test negative for the virus, but as that flock also has epidemiological connections to confirmed positive flocks, the producer has chosen to voluntarily depopulate these birds in an effort to contain the spread of the virus within their operations.