Avian Influenza - Fact Page

Last Updated: March 7, 2018

picture of chickens, turkey and barn

What is Avian Influenza?

Avian influenza is a viral disease affecting birds. It occurs naturally and may be spread by wildlife. No human cases of these avian influenza viruses have been detected in the United States, Canada, or internationally, and there is no immediate public health concern. USDA-APHIS Avian Influenza Brochure.

AI viruses are divided into two groups—highly pathogenic (HPAI) and low pathogenic (LPAI)—based on the ability of the virus to produce disease and the severity of illness it can cause.

  • HPAI spreads rapidly and has a high death rate in birds.
  • LPAI causes only minor illness and occurs naturally in migratory waterfowl.

Positive Cases of HPAI in Missouri

  • No confirmed cases in 2018

Frequently Asked Questions

Is chicken and other poultry safe to eat?

Chicken and other poultry products are safe to eat if they are properly handled and cooked. The affected birds have been quarantined and will not affect the food supply.

The U.S. Centers for Disease Control and Prevention (CDC) considers the risk to the general public from these infections in wild birds, backyard flocks, and commercial poultry, to be low.

What can bird owners do to protect their flocks?

Whether you are a commercial producer or backyard enthusiast, you should continue:

What are the symptoms for birds affected with high pathogenic avian influenza (HPAI)?

Poultry affected by avian influenza can show many symptoms, including:

  • Decreased food consumption, huddling, depression, closed eyes
  • Respiratory sigs, such as coughing and sneezing
  • Decreased egg production, watery greenish diarrhea, excessive thirst
  • Swollen wattles and combs
  • High mortality and sudden death