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

If you own, transport, or compete with horses in Indiana, understanding the state’s Equine Infectious Anemia (EIA) testing rules is not optional — it is a legal requirement tied to animal health, interstate movement, and event participation. Failing to comply can result in your horse being denied entry, quarantined, or worse.

Indiana’s EIA regulations are administered by the Indiana Board of Animal Health (BOAH) and are grounded in both state administrative code and federal USDA guidelines. This guide walks you through every aspect of the Coggins test requirement in Indiana — from which animals are covered to what happens when a horse tests positive.

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

Equine infectious anemia (EIA), caused by a lentivirus in the same family as HIV, is a viral and sometimes fatal disease that affects only equids — horses, ponies, mules, donkeys, and zebras. EIA is a reportable animal disease in all states and is not a threat to human health.

EIA is caused by a viral infection that affects the immune system of equine species, and one means of natural transmission is the transfer of blood from one equid to another during interrupted feedings of large biting flies, especially horse flies and deer flies. EIA virus can also be spread iatrogenically when needles, syringes, or multiuse bottles contaminated with blood from an infected equid are used to treat another equid.

Infected animals that survive the disease become virus carriers and can infect other equids for life. They must either be euthanized or permanently isolated from other equids to prevent transmission. Because there is no cure and no vaccine, testing is the only reliable tool for keeping the disease out of the horse population.

EIA has been detected and controlled in the United States since the 1970s using a diagnostic assay called the Coggins test. Over time, the prevalence of EIA in the U.S. had been reduced to very low levels, estimated to be around 0.004% of the horse population. Indiana regulates EIA testing to protect that progress and prevent reintroduction of the virus through interstate movement, sales, and exhibitions.

Key Insight: EIA is also known as “swamp fever.” The Coggins test is named after Dr. Leroy Coggins, who developed the diagnostic procedure in the early 1970s. Testing was quickly adopted by animal health authorities worldwide.

Which Animals Require a Coggins Test in Indiana

EIA is a disease of equids — horses, ponies, zebras, mules, and donkeys. Indiana’s testing requirements apply to all members of this group. The requirement is triggered primarily by movement into the state, movement to certain events, and entry onto licensed racing facilities.

Any horse stabled on the grounds, participating in a race, or entered in a race must have on file with the association prior to entering the association premises a negative test result for equine infectious anemia (Coggins test) within the last twelve months, in accordance with state law.

Each boarding, exhibition, and trail riding facility has its own requirements regarding Coggins testing. Most in Indiana require a certificate verifying a negative test within one year of the horse’s arrival on the premises. However, it is worth noting that horses and ponies located within Indiana do not require a negative EIA test for exhibition in Indiana under the state’s baseline exhibition rules — though individual venues often impose stricter standards.

Indiana also requires specific photo identification as part of the Coggins process. Indiana requires three pictures of the horse: left side, right side, and face from the front. Your horse’s markings must not be obscured, so the horse should not be wearing blankets or leg wraps or be excessively dirty.

When a Coggins Test Is Required in Indiana

The clearest trigger for a mandatory Coggins test in Indiana is interstate movement. All equines moved into Indiana must have tested negative for EIA within the twelve months prior to the animal entering Indiana. The animal must be accompanied by an official laboratory test report indicating the negative EIA test.

Three categories of animals are exempt from this entry testing requirement under Indiana Administrative Code 345 IAC 6-1.1-4.6:

• Suckling foals if they are accompanied by their dam and the dam meets the testing requirements.
• Animals moved directly to a licensed livestock market, if the market facility collects a sample and submits it for EIA testing immediately upon arrival at the market.
• Animals consigned for immediate slaughter.

Outside of entry requirements, a Coggins test is also needed when you bring a horse onto licensed racing grounds, enter certain boarding facilities, participate in competitive events, or purchase a new horse. You already need negative Coggins paperwork to travel with your horse and enter any show, competition, or event. You may not be thinking about a Coggins test when caught up in the excitement of shopping for a new horse, but veterinarians recommend having a Coggins test done as part of any purchase.

Pro Tip: Schedule your Coggins test well before your travel or event date. Standard AGID test results take 3–4 days to return. If you need results faster, ask your veterinarian about a rush ELISA test, which can return results within 24 hours at a higher cost.

How the Coggins Test Works and Approved Testing Methods in Indiana

The Coggins test is a blood test administered by a licensed, accredited veterinarian. The Coggins test, also known as agar gel immunodiffusion (AGID), remains the most widely accepted procedure for diagnosing EIA. Blood samples are submitted by an accredited veterinarian, state or federal animal health official, and EIA tests are conducted in USDA-approved laboratories.

The ELISA and AGID tests for EIA are accepted in Indiana. These are the two USDA-approved test methods:

• AGID (Agar Gel Immunodiffusion) — the original 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) and is the only procedure that has been statistically correlated with the presence of EIA virus in blood.
• ELISA (Enzyme-Linked Immunosorbent Assay) — a faster alternative. A “rush Coggins” using an ELISA testing procedure can be completed within 24 hours if time is a concern, but it is significantly more costly to perform.

Starting April 15, 2020, all veterinarians and laboratories must use USDA-approved EIA test forms. Digital EIA certificates must include the statement “Official EIA Test Form, Approved by USDA Veterinary Services March 2020” and meet all current federal requirements.

For identification purposes during testing, the paperwork requires your name and address, your horse’s name (registered and barn name), breed, gender, color and birth date, as well as a description of markings, brands, tattoos, and identifying features. Once a veterinary clinic has your horse’s identification records on file, they do not need to collect it again — all future Coggins testing will require only a blood draw.

It may take 60 days or more for a horse to test positive after initial infection. This window means that a recently exposed horse could test negative and still be carrying the virus. Annual testing is the standard safeguard against this risk.

Interstate Movement and Import Requirements in Indiana

Moving horses across state lines into Indiana requires both a negative EIA test and a Certificate of Veterinary Inspection (CVI). The CVI must be issued by a licensed and accredited veterinarian within the thirty days immediately prior to the animal entering Indiana.

No permit is required for movement of equine into the state of Indiana from other states — but the CVI and negative Coggins paperwork are still mandatory travel documents. Coggins testing is a prerequisite for the health certificate, and negative test results are noted on the health certificate as part of the healthy horse requirement.

Indiana also participates in the Extended Equine Certificate of Veterinary Inspection (EECVI) program. The EECVI provided by GlobalVetLink is accepted in Indiana. This electronic certificate is valid for up to 6 months and may be used for interstate movements of equine going to multiple destinations, such as shows and trail rides.

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. Note that Indiana specifically notes EECVIs are not approved for racetrack movements, so horses entering licensed racing facilities still need a standard 30-day CVI.

For horses moving out of Indiana, Indiana equine moving within Indiana do not need paperwork or identification, but you should always call ahead to the state of destination for equine moving out of Indiana, as requirements vary significantly by state.

International imports carry additional rules. Permits are required for horses imported from a country where Contagious Equine Metritis (CEM) exists or a country that trades horses freely with a country in which CEM exists. The Indiana Board of Animal Health has specific permitting, quarantine, and testing requirements for equine imported from a region where CEM exists or a region that trades horses freely with a region in which CEM exists.

Important Note: The full text of Indiana’s equine identification, movement, and testing laws can be found in 345 IAC 1-2, 345 IAC 1-3, and 345 IAC 6. Contact BOAH at (317) 544-2400 or toll-free at (877) 747-3038 for case-specific guidance.

What Happens When a Horse Tests Positive in Indiana

Animals that test positive for EIA may not enter Indiana. If a horse already inside the state returns a positive result, the consequences are immediate and serious.

In the United States, all horses that test positive must be reported to federal authorities by the testing laboratory. Within 24 hours of a positive result, your horse will be placed in quarantine more than 200 yards from other horses until confirmation testing and classification is complete. The state vet will be informed and a case will be opened to ensure proper protocols are followed.

EIA is a reportable disease and must be reported to all relevant authorities such as state veterinarians and federal animal health entities. If a horse tests positive for equine infectious anemia, owners are required to quarantine every horse on their property within the first twenty-four hours after infection is confirmed. An APHIS-certified veterinarian will then come and test all exposed horses on the property to determine how many have EIA.

Indiana horse owners should also be aware that carriers may experience clinical flare-ups, often following stress or strenuous work, and that chronically infected horses may show no clinical signs at all — making testing the only reliable way to detect the disease.

If you own or are considering purchasing a horse that may have been exposed, consult the Equine Disease Communication Center for current outbreak information and biosecurity guidance.

Quarantine, Euthanasia, and Isolation Rules in Indiana

Indiana follows the federal framework established by the USDA for managing EIA-positive horses. Because infected animals become lifelong carriers, they must be permanently isolated and quarantined or euthanized. There is no middle ground — a confirmed reactor cannot simply remain in the general horse population.

After testing, owners are left with two choices for any infected animals: permanent, strict isolation or euthanasia. The isolation standard is specific and demanding:

• A confirmed positive equine (or “reactor”) is subject to strict, lifelong quarantine at least 200 yards away from all other non-infected equines.
• Infected horses cannot be moved from the original premises during their lifetime except by special USDA approval.
• Positive horses must be kept two hundred yards away from all other equids since this is the distance a horsefly can travel and still transmit the live EIA virus.

If isolation is not a practical solution, owners may choose euthanasia. The state or USDA will monitor the entire procedure. In case your horse tests positive, it is essential to cooperate fully with the authorities to protect other horses within the community.

Horses that were potentially exposed but have not yet tested positive face their own restrictions. Based on the USDA EIA program rules applied consistently across states, potentially exposed horses that initially test negative will remain under quarantine until their sixty-day retest, per USDA program requirements. This 60-day window accounts for the incubation period before antibodies become detectable.

Euthanasia is usually the chosen option because it immediately eliminates the chance that the infected horse will spread the virus any farther. There is no vaccine available for equine infectious anemia. Methods of prevention include vector control (insect control) to reduce the possibility of transmission and ensuring that needles and other medical equipment contaminated with blood are never shared between horses.

Important Note: Indiana follows USDA Uniform Methods and Rules for EIA control. The 200-yard isolation distance is a federal standard, not just a state recommendation. Violating quarantine terms can result in enforcement action by both state and federal animal health authorities.

Penalties for Non-Compliance in Indiana

Indiana’s equine health regulations carry real consequences for owners, transporters, and facilities that fail to comply. Indiana’s animal health laws governing the transportation of equine into Indiana are detailed in 345 IAC 1-2, 345 IAC 1-3, and 345 IAC 6. Violations of these rules fall under the enforcement authority of the Indiana Board of Animal Health.

The most immediate consequence of non-compliance is denial of entry. Animals that test positive for EIA may not enter Indiana. Any horse brought into Indiana without a valid negative EIA test can be stopped at the point of entry or turned back by state animal health officials.

Beyond entry denial, moving a horse in violation of a quarantine order — or failing to report a positive test — constitutes a violation of state and federal law. It is entirely your responsibility as the owner or transporter to ensure that all applicable state, local, tribal, and federal regulations are complied with. The Indiana Board of Animal Health has authority to impose civil penalties, issue stop-movement orders, and refer cases to the USDA’s Animal and Plant Health Inspection Service (APHIS) for federal enforcement.

Facilities that admit horses without verifying current Coggins paperwork also face regulatory exposure. Officials must review official test papers of all equines entered into an event to ensure that all participating equines are test-negative. Event organizers, boarding facilities, and livestock markets that skip this step risk citations under BOAH’s compliance authority.

For the most current penalty schedules and enforcement procedures, contact the Indiana Board of Animal Health directly at (317) 544-2400. You can also review related Indiana animal health regulations — such as rabies vaccine requirements in Indiana — to understand how BOAH enforces multiple animal health mandates across the state.

If you travel regularly with horses or manage a multi-horse operation, staying current on EIA testing is the single most effective way to avoid regulatory trouble. Keep copies of your Coggins certificates with your horse at all times, verify requirements before crossing state lines, and work with a licensed, accredited veterinarian to schedule annual testing. For more on Indiana’s animal health landscape, see our guides to rabies vaccine requirements for cats in Indiana and fishing license requirements in Indiana. Horse owners interested in equine biology may also enjoy reading about the fastest horse breeds and types of snakes in Indiana that share the state’s rural landscape.