USDA-APHIS has confirmed eleven cases of HPAI in backyard flocks over the period June 22nd to July 7th.  Five states were involved extending from Washington State to Maine.  The most recent case involving 40 backyard fowl was confirmed on July 7th near Carson City, Nevada.

The continuing series of cases in backyard flocks suggests that wild birds may serve as reservoir populations with implications for extension to commercial flocks.  Since June and July are not months associated with movement of migratory birds, there is a question as to the extent of infection in domestic wild birds.  Surveillance with reports by APHIS would be helpful in this respect.