Avian influenza has been found at a live bird market in Union County, New Jersey. The market in the New York City metro area had 600 birds. The disease was confirmed Sept. 15, according to USDA.

Pennsylvania is a major supplier of birds to live markets in the region and just declared itself free of avian influenza three weeks ago. In a Monday morning message to stakeholders, the state Ag Department said no Pennsylvania-based distributors were connected to the market in a preliminary review, and the state had not found any positive farms as it worked through the traceback. Since May 2022, New Jersey has had four other sites, all under 100 birds, test positive for avian influenza.

The detection in Union County is the first in the U.S. since a Brooklyn market tested positive on Aug. 3. For background on avian influenza, and numbers to call to report a suspected outbreak, go here.