May 9, 2025

A backyard flock in Anne Arundel County, MD has tested presumptive positive for H5 avian influenza at the Salisbury Animal Health Laboratory, part of the National Animal Health Laboratory Network. Additional samples have been sent to the U.S. Department of Agriculture’s National Veterinary Services Laboratory (NVSL) for further confirmation. This is the second case in Anne Arundel County in 2025.

The Maryland Department of Agriculture has quarantined the affected premises, and the birds on the property are being depopulated to prevent the spread of disease. Birds from the affected flock will not enter the food system.

All announcements and pertinent information regarding the HPAI situation in Maryland will be posted at www.mda.maryland.gov/avianflu. This is the second detection in Anne Arundel County following a detection in March.