EIA and Coggins Test Requirements in Alaska: What Every Horse Owner Needs to Know

Equine Infectious Anemia is one of the most tightly regulated horse diseases in the United States — and for good reason. There is no cure or vaccine for EIA, making testing critical for disease prevention and control. Alaska’s geographic isolation creates a unique set of rules that differ from those in the contiguous states, particularly when it comes to how horses enter the state and what documentation you need to carry.

Whether you own horses already in Alaska, plan to bring horses into the state, or compete at equine events, understanding the Coggins test requirements that apply to you is not optional. EIA is a reportable animal disease in all states. Non-compliance can expose you to movement restrictions, quarantine orders, and civil penalties under Alaska’s animal health regulations.

This guide walks through every major requirement under Alaska law and the federal standards the state has adopted — from which animals must be tested to what happens when a horse tests positive.

What Is Equine Infectious Anemia (EIA) and Why It Is Regulated in Alaska

Equine infectious anemia (EIA) is a viral, and sometimes fatal, disease that only affects equids — horses, ponies, zebras, mules, and donkeys. The disease is caused by a lentivirus known as EIAV and has no approved treatment or vaccine available anywhere in the United States. Once infected, a horse is a lifetime carrier, posing a threat to other equines.

EIA is transmitted from one horse to another through the bites of mosquitoes and flies that have previously fed on an infected animal. Unlike many diseases, direct contact with an infected horse is not required for transmission, making containment challenging. Equine residents can also contract EIA through contaminated needles or other instruments.

The disease presents in three forms: acute (high fever, weakness, swelling, and anemia), chronic (intermittent fever, weight loss, anemia), and inapparent carrier (no visible signs, but the horse remains contagious). The inapparent carrier form is the most dangerous from a public health standpoint because infected horses can circulate freely in a herd without any visible warning signs.

Alaska regulates EIA under 18 AAC 36, the state’s animal health regulations administered by the Alaska Department of Environmental Conservation (DEC). Equine infectious anemia disease control activities in Alaska are conducted in accordance with the Equine Infectious Anemia: Uniform Methods and Rules adopted by reference in 18 AAC 36.920. This means Alaska has incorporated the federal USDA APHIS framework into state law, with certain specific modifications.

Efforts to control EIA in the United States started in 1972. Since then, the estimated national prevalence of EIA infection in the U.S. equine population has dropped from nearly 4 percent in 1972 to 0.004 percent. Alaska’s strict import requirements are a major reason the state has maintained a low-risk status.

Key Insight: EIA is sometimes called “swamp fever” because swampy, insect-heavy environments increase transmission risk. Alaska’s abundance of biting insects — including horseflies, deerflies, and mosquitoes — makes year-round vigilance important for horse owners in the state.

Which Animals Require a Coggins Test in Alaska

Under the federal Uniform Methods and Rules adopted by Alaska, the term “equine” covers any animal in the Family Equidae, including horses, asses, mules, ponies, and zebras. All of these animals are subject to EIA testing requirements when they enter Alaska or participate in regulated activities within the state.

All equids — horses, burros, donkeys, and mules — entering Alaska require an official health certificate of veterinary inspection. This requirement applies regardless of the animal’s age, with one narrow exception: foals up to five months of age are exempt from the EIA requirement if they are imported into Canada at the same time as their dam and are identified on the certificate of their dam or on a separate certificate. This exception applies specifically in the context of transit through Canada.

Within Alaska, horses that change ownership, enter boarding facilities, attend equine events, or are assembled for sale are also subject to testing requirements under the USDA Uniform Methods and Rules that Alaska has adopted. Event officials must review official test papers of all equines entered into an event to ensure that all participating equines are test-negative.

Pro Tip: If you board your horse at a facility that accepts horses from multiple owners, ask the facility manager whether they require proof of a current negative Coggins test for all incoming animals. Many reputable facilities enforce this as a condition of boarding, even when not strictly mandated by state law for intrastate movement.

When a Coggins Test Is Required in Alaska

Alaska requires a negative EIA test result in two primary situations: when importing equines into the state, and when horses participate in events or change ownership in contexts covered by the state’s adopted federal standards. A person who intends to import equines six months of age or older into the state must ensure that the health certificate or certificate of veterinary inspection includes certification that, not earlier than 180 days before departure, the animal tested negative for EIA.

A negative equine infectious anemia (EIA) test with blood drawn by an accredited veterinarian within 180 days of departure for Alaska is required. This 180-day window applies whether you are flying or barging your horse from another U.S. state, or driving through Canada to reach Alaska by land.

EIA tests are required in both the United States and Canada when traveling with horses, participating in shows, sales, breeding programs, and for general disease surveillance to prevent the spread of this lifelong infection. If your Coggins certificate expires while you are traveling, your health certificate may also become invalid, so planning ahead is essential.

• Importing any equid six months of age or older into Alaska
• Transiting through Canada to reach Alaska by land
• Participating in shows, sales, auctions, or competitive equine events
• Entering a new boarding facility that requires current documentation
• Selling or transferring ownership of an equine

In general, Coggins papers are valid for up to one year; however, some states or shows may require a negative Coggins test within six months of the event or transportation. For Alaska imports specifically, the 180-day (approximately six-month) window is the controlling requirement.

How the Coggins Test Works and Approved Testing Methods in Alaska

The Coggins test is a blood test that detects antibodies against the Equine Infectious Anemia Virus (EIAV). Developed in the 1970s by Dr. Leroy Coggins, it remains the gold standard for EIA diagnosis. The test does not detect the virus directly — it detects the antibodies a horse’s immune system produces in response to infection, which means a horse can test negative early in the infection window before antibodies develop.

Two USDA-approved test methods are accepted for regulatory compliance in Alaska and for movement between the U.S. and Canada:

• AGID (Agar Gel Immunodiffusion): Also known as the Coggins test, AGID is the most widely accepted procedure for the diagnosis of EIA. The test detects antibody against the viral p26 antigen (major core protein). It is the only procedure that has been statistically correlated with the presence of EIA virus in blood. Results typically take 24–48 hours.
• ELISA (Enzyme-Linked Immunosorbent Assay): The ELISA test is faster but requires AGID confirmation if positive. It is useful when rapid results are needed, but a positive ELISA must always be confirmed with AGID before regulatory action is taken.

USDA APHIS accepts both the cELISA and AGID EIA tests for movement between the United States and Canada. EIA testing laboratories must be approved by the National Veterinary Services Laboratory in Ames, Iowa.

Only a licensed, USDA Category II accredited veterinarian may collect the blood sample and submit it to an approved laboratory. Accredited veterinarians must complete a VS 10-11 form either electronically or by paper using one of the USDA-approved systems or forms and submit samples to APHIS-approved labs. Starting April 15, 2020, all veterinarians and laboratories must use USDA-approved EIA test forms.

Pro Tip: Schedule your Coggins test at least two weeks before any planned travel to Alaska. Lab processing, paperwork, and veterinary scheduling can take longer than expected, especially during peak show season. A lapsed test certificate can delay your horse’s entry into the state.

Interstate Movement and Import Requirements in Alaska

Alaska’s geographic position makes its import requirements more complex than those of most other states. Because Alaska is not contiguous with the lower 48 states, horses must travel either by air, by barge, or by road through Canada — and each route carries its own documentation requirements.

Equids flown or barged from one U.S. state to another U.S. state require an interstate health certificate signed by an accredited veterinarian, plus an Alaska state import permit. A permit number will be issued to the accredited veterinarian writing the health certificate or CVI by the State of Alaska Office of the State Veterinarian.

Equids transiting through Canada to Alaska require an international export health certificate issued by a USDA accredited veterinarian and endorsed by a USDA APHIS federal veterinarian. Work with your accredited veterinarian and local USDA APHIS Service Center to obtain an international export certificate.

The health certificate itself must include specific statements about disease status. The official certificate of health or CVI should include statements that the horses identified on the certificate are free from symptoms of infectious or contagious disease, have not originated from a premises or region under quarantine for vesicular stomatitis, have not originated from a premise under quarantine for equine piroplasmosis, and have not been on any premise where contagious equine metritis (CEM) has been isolated during the 60 days immediately preceding export to Alaska.

Before you depart the United States and enter Canada, make sure that your certificate will still be valid upon entry into Alaska or reentry into the lower 48 states. The certificate is valid 30 days after the date of inspection for export by the accredited veterinarian. If your transit through Canada takes longer than expected, your paperwork may expire before you arrive.

Route to Alaska	Documents Required	EIA Test Window
Air or barge (domestic)	Interstate CVI + Alaska import permit	Within 180 days of departure
Road through Canada	International export health certificate (USDA-endorsed) + Alaska import permit	Within 180 days of departure

For questions about port-specific requirements, you must contact the port at least 3 business days prior to crossing, as each port may have its own additional requirements. You can reach the USDA APHIS office in Palmer, Alaska at alaska.import.export@usda.gov or (907) 229-7656. The Alaska DEC’s Livestock and Horse Import/Export page also provides current guidance and printable species-specific fact sheets.

For CVI submissions, the veterinarian issuing the CVI must submit a copy by mail or email a scanned copy in PDF format to the Alaska DEC office. Import permits can be obtained online through Alaska’s Animal Tracking System or by calling 907-375-8215. You can also learn about related Alaska wildlife and animal regulations through resources like hunting license requirements in Alaska and fishing license requirements in Alaska.

What Happens When a Horse Tests Positive in Alaska

A positive EIA test result triggers an immediate chain of regulatory actions under both state and federal authority. It may take 60 days or more for the horse to test positive after initial exposure, which is why retesting of exposed animals is required following a confirmed case on a premises.

When a laboratory returns a positive result, it must be reported to both state and federal animal health officials. Animal health professionals — including veterinarians, diagnostic laboratories, and public health personnel — report diagnosed or suspected cases of nationally listed reportable animal diseases to APHIS Area Veterinarians in Charge and to the state animal health official. In Alaska, that means notifying both the USDA APHIS Area Veterinarian in Charge and the Alaska DEC Office of the State Veterinarian.

The positive horse is placed under immediate quarantine pending investigation. If a horse tests positive for EIA, it will be quarantined and the state veterinarian will be notified. This quarantine area must be 200 yards from other horses. Other horses that may have been in contact with infected horses will also be quarantined. Seropositive horses are then identified by a National Uniform Tag code number that the USDA state veterinarian provides.

A horse that has been exposed to an infected horse should be re-tested in several months to confirm a negative result. The standard retesting interval under the USDA Uniform Methods and Rules is 60 days after the last known exposure, consistent with the incubation period of the virus.

Quarantine, Euthanasia, and Isolation Rules in Alaska

Once a horse is confirmed EIA-positive, the owner faces a limited set of options — none of which allow the horse to return to the general equine population. Horses that test positive for Equine Infectious Anemia must either be euthanized, branded, and strictly quarantined more than 200 yards away from other horses for life, or transferred to a research facility.

Alaska’s regulations follow the USDA Uniform Methods and Rules on this point, which set the 200-yard minimum separation distance as the baseline for lifelong quarantine. A confirmed EIA positive equid must be euthanized or quarantined for life 200 yards away from any EIA negative equid as per USDA EIA program rules. In practice, horses confirmed positive can be quarantined for the remainder of their lives but are usually euthanized.

If the owner elects lifelong quarantine, the horse must be permanently identified with a brand or other official marking, and the premises must remain under state supervision. The reactor may be moved interstate to a diagnostic or research facility after the individual issuing the certificate has consulted with the state animal health official in the state of destination and has determined that the reactor will be maintained in isolation sufficient to prevent the transmission of equine infectious anemia to other horses, and will remain quarantined under state authority at the diagnostic or research facility until natural death, slaughter, or until disposed of by euthanasia.

All horses on the same premises as a confirmed positive case are considered exposed animals and fall under quarantine orders until retesting clears them. The 60-day retest protocol applies to each exposed animal. EIA carrier horses are possible — horses that have virus in their blood but do not express the clinical signs of disease. These horses are dangerous to the general horse population as they represent a silent pool of virus that will go on to infect other horses.

Important Note: Euthanasia, quarantine, and premises release decisions are made jointly by the Alaska DEC Office of the State Veterinarian and USDA APHIS. Contact the state veterinarian’s office at 907-375-8215 immediately if you receive a positive EIA result. Do not move any horses on or off the premises until you receive official guidance.

Alaska’s biting insect population — including biting flies in Alaska that are primary EIA vectors — makes strict quarantine enforcement especially important during warmer months when insect activity peaks. Owners managing a quarantined property should implement aggressive fly control measures to reduce the risk of insect-mediated transmission to neighboring herds.

Penalties for Non-Compliance in Alaska

Failing to comply with Alaska’s EIA and Coggins test requirements can result in civil and administrative penalties under the state’s animal health statutes and regulations. Alaska’s animal importation regulations at 18 AAC 36 give the Department of Environmental Conservation broad authority to enforce animal health rules, including the authority to quarantine, order testing, and restrict movement of non-compliant animals.

The purpose of Alaska’s animal health chapter is to establish animal importation regulations, prevent the introduction of animal disease that could infect the state’s domestic and wildlife populations, establish animal care standards, provide for quarantine, vaccination, or depopulation in the event of a disease outbreak, ensure accurate disease diagnosis, prevent the spread of infectious, contagious, communicable, and dangerous diseases affecting domestic animals within the state, and carry out state and federal animal disease control and eradication programs.

Specific enforcement consequences for non-compliance include:

• Movement denial at the border or port of entry: Horses arriving without a valid negative Coggins test or proper import permit may be refused entry into Alaska.
• Mandatory quarantine at owner’s expense: Animals that enter without required documentation may be held under quarantine until testing is completed and results are returned, with all costs borne by the owner.
• Civil penalties: Non-compliance can lead to fines, restrictions on horse movement, and even penalties in cases of disease outbreaks.
• Criminal liability: Knowingly falsifying health certificates or EIA test results is a federal offense under USDA regulations and may also violate Alaska state law.

Limited federal authority, variable state regulations, and inconsistent enforcement have historically resulted in confusion, misinformation, and opportunities for avoiding regulations or fraud. Alaska’s adoption of the USDA Uniform Methods and Rules by reference is designed to close those gaps and give state officials clear enforcement authority aligned with federal standards.

It is important for accredited veterinarians to check the receiving state’s requirements prior to issuing a CVI, as each state has different import requirements for different species. It is the responsibility of the accredited veterinarian to ensure that vaccines are given within required time frames, the required statements and test results are included on the certificate, and that the CVI is submitted promptly.

To stay current on Alaska’s animal health requirements, consult the Alaska DEC Livestock and Horse Import/Export page and the USDA APHIS equine import page for Alaska before any movement. Regulations can change on short notice when disease events occur, and verifying current requirements with the Alaska Office of the State Veterinarian at 907-375-8215 is always the safest approach before travel.

If you are new to keeping horses in Alaska, exploring related resources on the state’s unique animal landscape — including dangerous animals in Alaska and the breeds that make an Alaskan Husky — can help you build a broader understanding of the environment your horses will live in.