Recent Avian Influenza Findings in the United States

Avian Influenza (AI) type A viruses have been found in over 40 species of wild and domestic birds and cases occur every year throughout the world.

Low pathogenicity AI occurs periodically in the US. High pathogenic avian influenza (HPAI) is an extremely infectious and fatal form of the disease. The virus is shed in fecal droppings, saliva and nasal discharge of some avian wildlife species and infected domestic poultry. Contaminated water has become a common source of infection for birds.

The clinical signs of birds affected with all forms of AI may show one or more of the following:

  • Sudden death without clinical signs
  • Lack of energy and appetite
  • Decreased egg production
  • Soft–shelled or misshapen eggs
  • Swelling of the head, eyelids, comb, wattles, and hocks
  • Purple discoloration of the wattles, combs, and legs
  • Nasal discharge
  • Coughing, sneezing
  • Lack of coordination
  • Diarrhea

Although different subtypes of type A AI have been identified, the subtypes most often associated with high pathogenicity avian influenza (HPAI) with high morbidity and mortality in birds are H5 and H7. There has been an H5N1, HPAI subtype circulating in Southeast Asia since 1997. It is of concern to public health because it has spread from birds to people. However, H5N1 has accounted for only a relatively small number of human illnesses. H5N1 is considered to have the potential to become pandemic, since it is a novel strain for the human population (with no human immunity), and it has resulted in severe morbidity and mortality in the diagnosed human cases. The subtype would need to be capable of spreading easily from person to person, to become a human pandemic and that capacity has not yet been demonstrated.

High pathogenicity AI is a reportable disease nationally. Multiple agencies with oversight responsibilities for domestic birds and wildlife in North Dakota have an Avian Influenza Response Plan in place. The plan includes surveillance and monitoring activities as well as response procedures for diagnosis of high pathogenicity AI in North Dakota.

All bird owners, whether commercial producers or backyard enthusiasts, should continue to practice good biosecurity, prevent contact between their birds and wild birds, and immediately report sick birds or unusual bird deaths to State/Federal officials, either through the state veterinarian at 701-328-2655 or your private veterinarian.  

USDA Avian Influenza website

USDA/APHIS Biosecurity Website

Biosecurity for Poultry - Keeping Your Poultry Healthy

Video - Healthy Flocks Rock

Consistent biosecurity practices are the best way to prevent diseases such as avian influenza. The following steps can help you keep your birds healthy:

Frequently asked questions 

1. Are the flu viruses of human and birds the same?

In most cases, the influenza viruses that infect birds do not infect humans and vice versa. The first case in both humans and birds was discovered in Hong Kong in 1997.

 2. What are the risks of getting avian influenza from waterfowl?

Avian influenza virus infections are widespread in wild birds, especially ducks. Migrating waterfowl are a significant source of avian influenza viruses especially in the major flyways. Turkeys on open ranges in Minnesota, a state in the major flyway for migrating ducks, frequently experience low pathogenicity avian influenza problems. But the prevalence of avian influenza in turkeys has been high in some years and minimal in others. The reason why influenza viruses come and go is not known. The risk of transmission of Avian Influenza to susceptible birds from contact with waterfowl must be considered, although it may vary from year to year for unknown reasons.

3. Why can't I prevent infection by vaccinating my flocks?

Vaccines effectively prevent clinical signs of influenza infections in many species including poultry. However, the vaccines are not cross-protective for the 15 virus subtypes that can infect poultry. Since there is no way to predict which type will infect a flock, vaccines are generally not practical to prevent infections.

4. What should I do if I suspect avian influenza in my birds?

You should contact your veterinarian if you observe any of the signs of avian influenza, especially if they are accompanied by a drop in feed consumption and/or a significant drop in egg production. Because the signs of avian influenza are so variable, it is important to get the help of an expert for diagnosis.

5. Does the United States Department of Agriculture provide indemnity for infected poultry?

For producers who do not participate in the National Poultry Improvement Plan, indemnity may not be 100%.

Avian Influenza Contacts

Jeanne David

Avian Influenza Coordinator
State Board of Animal Health 600 E Boulevard Ave. Dept. 602 Bismarck, ND 58505-0020
701-328-2655 701-220-0151

North Dakota State Board of Animal Health

600 East Boulevard Ave. Dept. 602 Bismarck, ND 58505-0020