EIA and Coggins Test Requirements in Vermont: What Every Horse Owner Must Know
June 27, 2026
If you own, sell, or transport horses in Vermont, the Coggins test is one regulation you cannot afford to overlook. Equine infectious anemia (EIA) is a viral, and sometimes fatal, disease that only affects equids — horses, ponies, zebras, mules, and donkeys. Because there is no treatment, and EIA can be difficult to recognize and may be confused with other diseases, Vermont has built a regulatory framework around mandatory testing to keep the disease out of the state’s equine population.
Vermont’s rules cover imported horses, horses changing ownership, and animals attending fairs and competitions. Understanding exactly when a test is required, which animals are covered, and what happens after a positive result can save you from serious legal and financial consequences. This guide walks through Vermont’s EIA and Coggins test requirements from the ground up.
What Is Equine Infectious Anemia (EIA) and Why It Is Regulated in Vermont
Equine infectious anemia is an untreatable blood-borne viral disease of horses. It has been detected and controlled in the United States since the 1970s using a diagnostic assay called the Coggins test. The disease is commonly called “swamp fever” because stagnant, marshy areas tend to support higher populations of the biting insects that spread it.
EIA is most often transmitted by biting flies — tabanids (horse and deer flies) are considered the most significant transmitters. Biting flies transmit EIA by taking a blood meal from an EIA carrier and then transmitting that infected blood to a noninfected horse. Since it is relatively impossible to eliminate blood-sucking insects around horses, there is always the potential of a horse contracting EIA when in the vicinity of an infected horse.
Other modes of transmission include the use of contaminated equipment, such as used needles and syringes; mare-to-foal transmission in utero; and through natural breeding of mares and stallions. Once infected, a horse is a lifetime carrier, posing a threat to other equines. There is no vaccine and no cure.
Since there is no vaccine or effective treatment for EIA, the Animal Health Section of the Vermont Agency of Agriculture, Food and Markets regulates the importation of equine animals into Vermont closely in order to ensure that infected horses do not enter the state and pose a risk to resident horses. Although Vermont has not experienced a confirmed case of EIA in a number of years, import regulations currently in place help to ensure that Vermont remains free of this disease.
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. Vermont’s ongoing testing requirements are a direct reason why the state has maintained that disease-free status.
Pro Tip: Even if your horse never leaves your property, annual Coggins testing is strongly recommended. Silent carriers show no symptoms but can transmit EIA to every horse that shares a pasture or fence line.
Which Animals Require a Coggins Test in Vermont
Under Vermont law, “equines” means any member of the family equidae, including horses, ponies, mules, asses, and zebras. All of these animals fall under Vermont’s EIA testing statutes. The obligation is not limited to purebred horses or animals used in competition — it applies to any equid that is sold, imported, or moved to a fair or show within the state.
All equines, including horses, mules, donkeys, and zebras, can be affected by EIA. There is evidence that donkeys, while susceptible to EIA, often do not exhibit clinical symptoms, possibly due to the low viral load of the disease in their blood compared to that of horses. Similarly, mules appear less likely to develop severe symptoms, and infection may go unnoticed without close observation. Despite these differences in clinical presentation, donkeys and mules are still subject to the same testing rules as horses in Vermont.
The Vermont statute does carve out one narrow ownership-transfer exemption. Any equine animal purchased, sold, offered for sale, bartered, exchanged, or given away within the state must be tested and certified as negative for equine infectious anemia. A test is not required when the transfer of ownership is between the owner of the animal and his or her spouse, child, or sibling, and where the animal is not moved to new premises. Outside of that family exemption, every change of equine ownership in Vermont triggers a testing requirement.
When a Coggins Test Is Required in Vermont
Vermont law identifies several distinct situations that require a valid negative Coggins certificate. Knowing each trigger helps you plan testing well in advance rather than scrambling at the last minute.
- Import into Vermont: All horses imported into Vermont on a temporary or permanent basis must test negative on a Coggins test for EIA within 12 months of entry into the state.
- Change of ownership: Any equine animal that is purchased, sold, offered for sale, bartered, exchanged, or given away within the state must be tested for and certified as negative to EIA by an accredited veterinarian within 60 days prior to the transfer of ownership.
- Fairs, shows, and competitions: The Secretary may require by rule that any equine animal transported to any fair, show, competition, or other gathering of equine animals be accompanied by a certificate that states that the equine animal has been tested and found negative for equine infectious anemia.
- Suspected exposure: Whenever the Secretary has reason to believe that any equine animal has been exposed to equine infectious anemia and that the animal may pose a threat to other equine animals, the Secretary may require that the animal be tested by an accredited veterinarian or by a State or federal veterinarian approved by the Secretary.
Every state has its own horse travel requirements, but most require a Certificate of Veterinary Inspection (CVI) issued within 30 days of your planned travel date. Many show organizers also require a current certificate even if you are not crossing state lines. Always confirm specific event rules with organizers before you haul.
Important Note: Vermont’s 12-month import window and 60-day pre-sale window are separate requirements. If you are both importing a horse and selling it shortly after arrival, confirm with your veterinarian that a single test satisfies both timelines, or whether a second test may be needed.
How the Coggins Test Works and Approved Testing Methods in Vermont
Testing of equine animals for equine infectious anemia in Vermont shall be done by an accredited veterinarian licensed in the State by means of a Coggins test or other test acceptable to the Secretary, at the owner’s expense. The test must be performed at a USDA-approved laboratory.
Vermont’s statute defines the Coggins test precisely. The “Coggins test” means the agar gel immunodiffusion blood test conducted in a laboratory approved by the U.S. Department of Agriculture and the Secretary. This AGID method is the gold standard, but a second test type is also accepted.
There are two approved testing methods:
- 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 come back in 24–48 hours.
- ELISA (Enzyme-Linked Immunosorbent Assay): The ELISA test is also an acceptable test and can be performed within a few hours. However, the ELISA requires AGID confirmation if the result is positive.
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. The completed certificate documents the horse’s identity, owner information, testing laboratory, and result. Owner and stable information, the horse’s name, color, age, sex, and narrative description are required and cannot be modified once the Coggins test is finalized and reported out from the lab. Most Coggins tests are currently completed electronically, and it is important to have good-quality pictures to correctly identify the horse.
Most labs will have results returned to the veterinarian and/or horse owner within five business days. If travel is required before then, labs can rush the results for an additional fee. Plan your testing appointment well ahead of any sale, import date, or event entry deadline.
Vermont also participates in the Extended Equine Certificate of Veterinary Inspection (EECVI) program. An EECVI is valid for six months from the CVI inspection date or until the horse’s current EIA/Coggins test expires, whichever comes first. Since EIA tests are typically valid for 12 months from the blood draw date, the EECVI expiration is determined by whichever date occurs sooner. This program can simplify paperwork for horse owners who travel frequently to events.
Interstate Movement and Import Requirements in Vermont
Any equine animal imported into the State or transported through the State shall be accompanied by a Certificate of Veterinary Inspection. The certificate shall state that the equine animal has been tested negative for equine infectious anemia by an accredited veterinarian.
No person shall import or cause to be imported any domestic animal into Vermont without first obtaining a Certificate of Veterinary Inspection. The certificate shall be issued by an accredited and licensed veterinarian in the state or country of origin. The certificate shall be issued electronically or on a form prescribed by the state of origin and declare that all of the animals listed have been inspected or tested, or both, as required by the applicable state and federal statutes, rules, and regulations.
| Movement Type | Test Window Required | Documents Needed |
|---|---|---|
| Import into Vermont (temporary or permanent) | Negative Coggins within 12 months of entry | Certificate of Veterinary Inspection + Coggins certificate |
| Intrastate sale or transfer of ownership | Negative Coggins within 60 days before transfer | Coggins certificate issued by accredited VT vet |
| Fair, show, competition, or equine gathering | Negative Coggins (period set by Secretary’s rule) | Coggins certificate |
| Travel to Canada | Negative Coggins within 6 months | International health certificate + Coggins certificate |
If you are travelling to Canada, an international health certificate is required. This is a more complex process as it needs to be signed by the state veterinarian, and Coggins tests are only good for six months for international health certificates.
No person shall import domestic animals into the State from any herd, flock, or group that is under quarantine in the state or place of origin due to the presence or suspected presence of an infectious or contagious disease, except that such quarantined herds may be moved directly to slaughter on permits issued by the Secretary. This rule means you must verify the disease status of the herd of origin before any import.
For horse owners who regularly cross state lines for shows or trail rides, consider exploring the fastest horse breeds and their travel demands — frequent haulers especially benefit from keeping Coggins paperwork current and easily accessible at all times.
What Happens When a Horse Tests Positive in Vermont
A positive Coggins result sets off a mandatory regulatory response. Vermont law uses the term “reactor” to describe an animal that tests positive. Under Vermont statute, “reactor” means an animal that tests positive to any official test required under this chapter.
Any equine animal found to be a reactor by means of a test shall be administered a second test in accordance with the applicable state and federal statutes, rules, or regulations. Any equine animal found to be a reactor shall be quarantined in accordance with instructions of the Secretary between receipt of the results of the first and second tests.
Any veterinarian who identifies an equine animal as a reactor shall report that animal to the Secretary in a form and manner to be prescribed by rule of the Secretary. EIA is a reportable animal disease in all states. This means the reporting obligation falls on the veterinarian immediately upon identification — not after a second confirmatory test.
It may take 60 days or more for a horse to test positive after initial exposure. This incubation window is one reason why horses that have been in contact with a confirmed reactor are also subject to follow-up testing and quarantine while results are pending.
Important Note: If your horse tests positive, do not move the animal until you receive written instructions from the Vermont Secretary of Agriculture. Moving a reactor without authorization violates state law and can expose you to significant penalties.
Quarantine, Euthanasia, and Isolation Rules in Vermont
Vermont law provides two paths for a confirmed EIA reactor: permanent quarantine or euthanasia. Any equine animal found to be a reactor to a second test shall continue to be quarantined until adequate arrangements are made for disposition of the animal.
As an alternative to destruction, reactors may be isolated permanently under quarantine from all other equine animals and shall be conspicuously freeze-branded with the letters “EIA.” This branding requirement ensures the animal’s status is permanently and visibly documented, regardless of where it is kept.
Permanent quarantine requires isolating the horse in a designated area at least 200 yards away from noninfected horses. Even in the best management situations, blood-sucking insects cannot be totally controlled or eliminated, which is why many animal health authorities consider permanent quarantine a difficult and imperfect alternative to euthanasia.
If euthanasia is chosen or ordered, Vermont statute sets specific procedural requirements. The destruction of the animal shall be by a licensed veterinarian and shall be observed by the Secretary or an agent of the U.S. Department of Agriculture. Any licensed veterinarian who destroys any equine animal in accordance with these provisions shall immediately report the destruction of the animal to the Secretary.
Notwithstanding the euthanasia provisions, a reactor may be transported to an approved slaughterhouse or research facility where authorized by written permission of the Secretary. In granting permission, the Secretary may specify the conditions under which the animal shall be quarantined, transported, and destroyed.
Exposed horses on the same premises are also subject to regulatory action. Exposed equines will be quarantined and tested, and be subject to a retest 45–60 days after the removal of the EIA-positive horse. Quarantine will remain in effect until negative retest results are received.
Penalties for Non-Compliance in Vermont
Failing to comply with Vermont’s EIA testing requirements carries real legal and financial risk. Vermont’s animal health statutes classify contagious diseases as a public nuisance. Contagious diseases as defined in Vermont statute are declared to be a public nuisance requiring preventative and remedial action to protect the public health and welfare.
Importing a horse without the required Certificate of Veterinary Inspection and negative Coggins certificate is a direct violation of Vermont law. While in the State, illegally imported domestic animals shall be strictly quarantined. In the event the animals cannot be returned to the state of origin, they may be slaughtered or euthanized within 72 hours of a determination by the Secretary that the animals have been illegally imported. The owner shall bear the full expense of their removal from the State or destruction and shall not be entitled to any compensation from the State.
Depending on the state, owners can face fines of up to $25,000 or more per horse for moving horses without valid Coggins documentation. Vermont’s broader animal disease statutes also authorize the Secretary to quarantine premises, seize animals, and take other remedial action at the owner’s expense when violations are found.
Sellers who transfer ownership of a horse without a valid Coggins certificate within the required 60-day window are also in violation of Vermont law. The cost of testing — typically ranging from $20 to $50 depending on your location and your veterinarian’s fees — is far less than the exposure from a fine, a forced quarantine, or the loss of an animal.
Beyond legal penalties, non-compliance puts Vermont’s disease-free status at risk. The Animal Health Section of the Vermont Agency of Agriculture, Food and Markets supports private veterinarians in surveying for the presence of EIA in the state’s equine population. In addition to providing in-state diagnostic support for EIA, the Agency has promulgated rules that require EIA testing prior to moving horses interstate and also require testing in some cases of intrastate equine movement.
To stay current on Vermont animal health regulations and related state wildlife topics, you may also find these resources helpful: venomous animals in Vermont, raccoon ownership laws in Vermont, and exotic pets legal in Vermont. For Vermont fishing regulations, see the Vermont fishing license requirements guide.
The bottom line for Vermont horse owners is straightforward: test before you sell, test before you import, keep your paperwork current, and contact the Vermont Agency of Agriculture, Food and Markets Animal Health Section if you have any questions about specific situations. A simple blood draw and a few days of waiting is a small investment compared to the consequences of a positive case or a regulatory violation.