Avian influenza detected in bald eagles in Georgia
Posted on Apr 19, 2022 at 0:00 AM
Highly pathogenic avian influenza has been detected in bald eagles in Georgia and has likely undercut nesting success for eagles in the state’s coastal counties, according to the Georgia Department of Natural Resources.
Samples from three bald eagles found dead, one each in Chatham, Glynn and Liberty counties, tested as suspected positive last month at the Southeastern Cooperative Wildlife Disease Study in Athens. Those results were recently confirmed as HPAI (H5N1 188.8.131.52b Eurasian strain) by the USDA National Veterinary Services Laboratories in Ames, Iowa. Other eagle carcasses are also being checked.
Avian influenza can infect wild and domestic birds, as well as other animals. The strain known as highly pathogenic avian influenza, commonly referred to as HPAI, is worldwide, highly infectious, untreatable and potentially lethal to infected animals. HPAI has been detected in wild birds in more than 30 states this year, the U.S. Agriculture Department reports. Those cases list 11 wild birds in Georgia, including lesser scaup, gadwall, American wigeon and now bald eagle.
HPAI has been detected in poultry flocks in 30 states as of April 16, though none have been reported in Georgia to date. The disease presents a major threat to commercial poultry production, and producers are urged to continue diligence in their biosecurity measures.
The risk of HPAI being transmitted to people is low. To date, no human infections from the current virus (H5N1) have been documented in the U.S., according to the Centers for Disease Control and Prevention.
In Georgia’s six coastal counties, annual DNR aerial surveys of nesting bald eagles have revealed more failed nests – those that did not fledge young – than expected. Some nests had dead eaglets. Others were missing young that usually would not have left the nest yet, according to survey leader Dr. Bob Sargent, a program manager with DNR’s Wildlife Conservation Section.
Citing preliminary findings, Sargent estimated that nest success along the coast this year is down about 30%. Although the number of nests documented, 73, was normal, he said fewer than half fledged young, compared to an annual average success rate of 78% from 2015-2021.
About a third of the eagle nests in Georgia are in the coastal counties. HPAI is typically carried by waterfowl and shorebirds. Eagles could have contracted the virus by preying or scavenging on dead or sick waterbirds (ducks often gather in large rafts in coastal waters during winter). Dead bald eagles have been confirmed with HPAI in other Southeastern states, including Florida, South Carolina and North Carolina.
Sargent said the bald eagle population in Georgia is strong and he does not expect HPAI to significantly slow the species’ rebound. Initial survey results of eagle nesting outside the coastal region indicate a success rate on par with previous years. Full survey results are expected by late spring.
DNR is working with the Southeastern Cooperative Wildlife Disease Study and other agencies to investigate mortalities involving wild birds on the coast. Wildlife rehabilitators have been advised.
To help prevent the spread of HPAI, the public should avoid handling sick or dead birds (CDC recommendations for hunters and game birds), report dead or sick eagles to DNR at (478) 994-1438 and keep pets away from sick or dead birds. Symptoms of HPAI can vary from lethargy to tremors and seizures. However, live birds can be asymptomatic and dead ones may show no obvious signs of trauma.
The Georgia Department of Agriculture (GDA) provides guidance regarding commercial poultry operations and backyard flocks on their website at GDA Avian Influenza Resource Page and Protect Your Flock (GDA). Issues involving poultry should be promptly reported to the Georgia Avian Influenza Hotline, (770) 766-6850 or gapoultrylab.org/avian-influenza-hotline. For concerns about a potential human infection or exposure, please contact your public health department.
In mid-February, the GDA ordered suspension of all exhibitions, shows, sales (flea markets, auction markets), swaps, and meets pertaining to poultry and feathered fowl in Georgia until further notice. Notifications will be announced when listed activities can resume in Georgia.
According to the U.S. Centers for Disease Control and Prevention, the recent HPAI detections in birds do not present an immediate public health concern. No human cases of these avian influenza viruses have been detected in the United States. As a reminder, the proper handling and cooking of poultry and eggs to an internal temperature of 165 ˚F kills bacteria and viruses.
Good biosecurity practices are the best defense against AI infection and poultry producers must take the following measures to protect their flocks:
• Move all poultry with outside access indoors.
• Implement strict biosecurity.
• Monitor flocks for clinical signs consistent with AI.
• With HPAI, birds may become quiet, not eat and drink, have diarrhea, and have discolored combs and feet. Birds may also die suddenly with no signs of disease.
• Report any concerns to your veterinarian, state animal health official or federal animal health official immediately.
Avian Influenza is a reportable disease in Georgia. If you have concerns about AI in birds, call the Georgia Avian Influenza hotline at (770) 766-6850 or visit https://www.gapoultrylab.org/avian-influenza-hotline/.
Biosecurity and other resources: