Poultry in a backyard flock in Maricopa County tested positive for bird flu on Nov. 21, according to a joint release from the Arizona Department of Agriculture and the Arizona Department of Health Services.

PHOENIX - Arizona officials say avian influenza has been detected in Maricopa County. Per a statement released jointly by the Arizona Department of Health Services and the Arizona Department of Agriculture on Nov. 25, poultry in a backyard flock within the county tested positive for bird flu.

The Arizona Department of Health Services says poultry in a backyard flock located in Maricopa County has tested positive for Avian Influenza.

A USDA database showed new detection of the virus in the county this week. ADHS says the samples were taken from poultry in a backyard flock and came back positive on Nov. 21.

"And the one we have right now is highly aggressive and especially extremely devastating to the poultry industry. It can kill almost all the birds in a flock very quickly when it gets into it."