
What is H5N1?
What is H5N1? H5N1 (called “Highly Pathogenic Avian Influenza” or “bird flu”) is a disease caused by influenza A viruses. Wild birds, particularly waterfowl, can carry and spread these viruses but may show no signs of illness. However, H5N1 can cause severe disease and death in domestic poultry (such as chickens, turkeys, ducks, and geese). H5N1 is causing illness in dairy cattle in multiple states as well, and cases of H5N1 have also been reported in wild birds, mammals, and other domestic companion animals, such as cats. People with close or prolonged contact with infected animals or contaminated environments may be at a higher risk of avian influenza infection.
Key Information for the Public
Key Information for Agricultural and Veterinary Workers
Key Information for Hunters
H5N1 in New Jersey as of 5/13/25
- Human cases: None.
- Wild birds: Confirmed detections have occurred in Burlington, Warren, and Salem Counties. Presumptive positive detections have occurred in Atlantic, Bergen, Burlington, Cape May, Cumberland, Gloucester, Hunterdon, Mercer, Middlesex, Monmouth, Morris, Ocean, Somerset, and Sussex Counties.
- Poultry:
- Live Bird Markets: Confirmed detections in Hudson, Mercer, Union and Essex Counties.
- Commercial Poultry Farms: None.
- Backyard flocks: Confirmed detections in Atlantic and Salem Counties.
- Cattle/livestock: None.
- Cats: Confirmed detections in cats in Hunterdon County.
- Other animals: Confirmed detections in captive bears in Ocean County.
News Releases as of 5/13/25
- 5/13/2025 - Highly Pathogenic Avian Influenza Case Confirmed and Contained in Essex County Live Bird Market
- 3/7/2025 - Highly Pathogenic Avian Influenza Confirmed in Hudson, Mercer County Live Bird Markets
- 2/28/2025 - H5 Highly Pathogenic Avian Influenza Confirmed in New Jersey Cat
- 2/21/2025 - Highly Pathogenic Avian Influenza Confirmed in Union County Live Bird Market
- 1/17/2025 - Murphy Administration Updates Public On Steps Being Taken To Track And Respond To H5N1 Avian Influenza (Joint Release)
- 5/16/2024 - NJ Agriculture, Health Departments Caution Raw Milk Consumption for Humans, Pets After Bird Flu Outbreaks
General Resources
New Jersey State Resources
- New Jersey Department of Agriculture
- New Jersey Department of Health
- NJ Fish and Wildlife, Department of Environmental Protection
Federal Resources