The child tested positive for influenza A, which could indicate a range of viruses, from seasonal flu to avian flu.
Sequencing didn't show any mutations that hint at greater infectivity, transmissibility, or resistance to neuraminidase inhibitors.
H9N2 is known to circulate in poultry in the region, and infections are typically reported in children who experience mild disease.
Arizona's patients were exposed to sick poultry at a large commercial farm in Pinal County.
Nevada is the 16th state to report avian flu in dairy cattle. Iowa's poultry outbreak is its first since June.
The 3-part order also requires affected farms to share epidemiologic information and any positive test results.
The avian flu virus is also taking a heavy toll on California's commercial poultry farms.
Investigators found hundreds of dead poultry at the patient's family home.
State health officials said multiple positive results in recent days came from Raw Farm's retail milk, its storage tanks, and its bottling facility.
The authors say it's crucial to better understand how the virus is spreading, amid the ongoing risk of exposure to farm workers and transmission among animal species.
