Coggins Test and EIA Requirements in North Dakota: What Horse Owners Must Know

If you own, transport, or compete with horses in North Dakota, understanding the state’s Equine Infectious Anemia (EIA) testing rules is not optional — it is a legal obligation. A single positive horse in a herd can trigger quarantine, costly investigations, and in most cases, euthanasia. Yet many horse owners only learn about these rules when they are stopped at a border checkpoint or turned away from a show.

This guide walks you through every aspect of North Dakota’s Coggins test and EIA regulations: which animals are covered, when testing is required, how the test works, what happens at state lines, and the consequences of a positive result or non-compliance. Always verify current requirements directly with the North Dakota Department of Agriculture (NDDA) before any movement, as rules can change.

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

Equine Infectious Anemia is a viral disease caused by the Equine Infectious Anemia Virus (EIAV), a member of the lentivirus family — the same viral subfamily that includes HIV. It is a bloodborne viral disease transmitted primarily through biting insects, especially horseflies and deerflies. Transmission also occurs frequently through reused needles, syringes, and contaminated instruments.

EIA is a viral disease affecting horses, mules, and donkeys, spreading primarily via blood-feeding insects like horseflies and deerflies, as well as contaminated equipment such as needles and surgical tools. Mares can also transmit the virus to foals in utero, and less commonly via milk or semen.

While certain equines may carry the virus without displaying any outward signs, others may exhibit pronounced symptoms such as irregular heartbeats, edema in the legs and abdomen, lethargy, anemia, elevated body temperature, and, in severe cases, sudden death. Horses in the inapparent carrier phase show no visible signs but remain contagious — and once infected, a horse is a lifetime carrier, posing a threat to other equines.

EIA is a viral disease with no cure and no vaccine for prevention. Because an infected horse can never be cleared of the virus, state and federal agencies regulate testing aggressively to prevent spread. Between 1972 and 2015, the rate of reactors among the tested population declined from 3.8 percent to 0.005 percent, demonstrating how effective mandatory testing has been — but also why consistent compliance remains essential.

North Dakota’s agricultural economy depends heavily on equine activity, from ranch work and rodeo to competitive showing and trail riding. The state regulates EIA testing under the authority of the North Dakota Board of Animal Health and the NDDA to protect that industry from outbreaks that could devastate herds across the region. If you also transport livestock and need to understand related documentation rules, see the brand inspection requirements in North Dakota for a complete picture of equine movement compliance.

Pro Tip: EIA is sometimes called “swamp fever,” but the disease is not limited to warm or wet climates. Cases have been confirmed across North Dakota and neighboring states, making annual testing relevant regardless of your location within the state.

Which Animals Require a Coggins Test in North Dakota

The Coggins test is a diagnostic tool used to detect Equine Infectious Anemia, a viral disease that affects horses, mules, and donkeys. In North Dakota, the testing requirement applies to all members of the equidae family — this means horses, ponies, mules, donkeys, and zebras are all covered under the state’s EIA regulations.

EIA is a viral disease affecting only equidae — horses, ponies, zebras, mules, and donkeys. No other livestock species are subject to Coggins testing requirements. If you own a mixed operation with cattle or other animals alongside equines, only your equidae need to meet EIA documentation standards for movement purposes.

There is no age exemption for adult horses, but foal testing requires some caution. Foals may produce false-positive results due to maternal antibodies passed via colostrum for as long as six months with either test method. If you need to test a young foal, discuss the timing with your accredited veterinarian to avoid a misleading result that could trigger unnecessary regulatory action.

Requiring a negative Coggins test for any horse, mule, or donkey that is on the property or entering your property is an excellent control measure to maintain an EIA-free stable. While not always legally mandated for horses that never leave your property, this practice is strongly encouraged by equine health professionals and is standard at boarding facilities, shows, and auction barns across the state.

When a Coggins Test Is Required in North Dakota

North Dakota requires a valid negative EIA test result in several specific situations. Understanding each trigger helps you stay compliant without scrambling for last-minute veterinary appointments.

• Importing horses into North Dakota: All horses require a negative test for Equine Infectious Anemia (EIA) within 12 months prior to the date of importation, unless originating from South Dakota (rodeo stock are not exempted).
• Horse shows, rodeos, and competitions: Many horse shows and rodeos require your horses to have a current Coggins (within the last 12 months) to be able to attend. Individual event organizers may set stricter timelines, so always check with the specific venue before hauling.
• Sales and auctions: A valid Coggins certificate (VS Form 10-11) is needed for buying and selling horses. Auction facilities and licensed dealers typically require proof of a current negative test before accepting animals.
• Boarding facilities: Most boarding operations in North Dakota require a current negative EIA test as a condition of entry to protect the resident herd.
• Interstate movement: All 50 states require proof of a negative EIA test — commonly called a Coggins — for any horse crossing state lines.

EIA tests are typically valid for 12 months from the blood draw date. Plan your testing schedule so your certificate does not expire mid-season, particularly if you travel to shows or events regularly between spring and fall.

Pro Tip: Schedule your annual Coggins test at least two to three weeks before your first planned movement of the season. Lab processing typically takes several business days, and rushing results for time-sensitive travel usually costs extra.

How the Coggins Test Works and Approved Testing Methods in North Dakota

The Coggins test was developed in the 1970s by veterinary researcher Dr. Leroy Coggins and has remained the standard diagnostic tool for EIA ever since. The Coggins test is a blood test that detects antibodies against the Equine Infectious Anemia Virus (EIAV). A positive result means the horse has been exposed and is a permanent carrier; a negative result means no detectable antibodies were present at the time of testing.

A licensed veterinarian must complete the collection of the blood, a physical examination of the horse, and take pictures of the horse as part of the testing process. You cannot self-collect a sample or use an unlicensed technician — the test requires a USDA-accredited veterinarian who can legally certify the results on an official form.

Two approved laboratory methods exist for EIA testing:

• AGID (Agar Gel Immunodiffusion): The only way to accurately determine whether a horse is infected with the EIA virus is by identifying antibodies in the blood via AGID or competitive ELISA tests. The AGID method is considered the “gold standard” and is commonly known as the Coggins test.
• C-ELISA (Competitive Enzyme-Linked Immunosorbent Assay): C-ELISA tests offer the advantage of rapid results; however, false-positive results are more common with C-ELISA, and positive results must be verified by a standard Coggins (AGID) test.

Samples should be submitted to an EIA APHIS-Approved Laboratory using a VS Form 10-11 or other USDA-approved EIA form. The NDSU Veterinary Diagnostic Laboratory in Fargo is one of the primary in-state options for EIA test processing. Paper EIA forms have become significantly more laborious for labs to process and incur an additional accession fee; electronic submission through platforms such as VSPS or GlobalVetLink is strongly encouraged, with no accession fee charged for electronic submissions.

Once the vet has drawn blood from the horse, it is sent to an approved laboratory for testing. Most labs return results to the vet and/or horse owner within five business days. If travel is required before then, labs can rush the results for an additional fee.

Starting April 15, 2020, all veterinarians and laboratories must use USDA-approved EIA test forms for regulatory compliance. Make sure your veterinarian is using a current USDA-approved form — outdated paper forms may be rejected by the lab, delaying your certificate and potentially leaving you out of compliance.

Interstate Movement and Import Requirements in North Dakota

Moving horses across state lines into North Dakota requires specific documentation, and the rules are enforced. Effective May 24, 2011, a certificate of veterinary inspection is required for all equines entering North Dakota for any length of time. There is no longer an exemption for equines entering temporarily for less than seven days.

All horses require a negative test for Equine Infectious Anemia (EIA) within 12 months prior to the date of importation, unless originating from South Dakota (rodeo stock are not exempted). The South Dakota exemption exists because of a formal bilateral agreement. The state of North Dakota has entered into an agreement with South Dakota to waive EIA testing for movement between these states. However, this exemption does not cover rodeo stock moving between the two states.

For all other states, you need both a current Certificate of Veterinary Inspection (CVI) and a negative EIA test result. Your Coggins test must accompany your CVI. If the Coggins expires during your trip, your CVI becomes invalid too, even if the health certificate itself has not expired. This is a common compliance mistake — always check the expiration date of your EIA test before loading your trailer.

North Dakota participates in the Extended Equine Certificate of Veterinary Inspection (EECVI) program, which allows a single health certificate to cover multiple trips over six months. 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. However, note that due to a multi-state outbreak of Equine Herpes Virus associated with multiple equine events, the use of the EECVI has been disabled at times — always confirm with your veterinarian and the NDDA before relying on an EECVI for an upcoming movement.

Important Note: The NDDA’s official page has indicated that EECVI availability may be suspended during disease outbreak periods. Contact the NDDA Animal Health Division directly before your trip to confirm whether EECVIs are currently accepted for entry into North Dakota.

If you are hauling horses from western states, brand inspection requirements may also apply. If you are hauling to, from, or through a western state, you may need a brand inspection — an official verification of ownership where a state brand inspector examines your horse’s brands and cross-references them with registration records. Review the brand inspection requirements in North Dakota to ensure you have all necessary paperwork for interstate hauls.

What Happens When a Horse Tests Positive in North Dakota

A positive EIA test result is one of the most serious outcomes in equine health management. Horses that test positive have the virus for life. Some are asymptomatic while others can have a range of health problems and can also die from the virus. There is no treatment that clears the infection.

When a horse tests positive, the result must be reported immediately. Cases must be reported to state and federal animal health authorities. The NDDA Animal Health Division and USDA APHIS Veterinary Services will both be notified and will initiate an investigation to trace potential exposure to other horses.

The United States Department of Agriculture and state animal health regulatory agencies require euthanasia or strict lifelong quarantine for horses testing positive for EIAV. In practice, horses confirmed positive can be quarantined for the remainder of their lives but are usually euthanized.

Once a positive result is confirmed, state veterinarians will assess the premises and identify any horses that may have been exposed. Exposed horses are typically retested at 60-day intervals to confirm their status. Potentially exposed horses that initially test negative will remain under quarantine until their sixty-day retest, per USDA program requirements.

The emotional and financial impact of a positive result can be severe. Beyond the loss of the animal, you may face quarantine of your entire property, restrictions on movement of all equines on the premises, and the cost of repeated testing for every horse you own. Annual Coggins testing for all your horses is the most effective way to catch a positive result early and limit the scope of any outbreak investigation.

Quarantine, Euthanasia, and Isolation Rules in North Dakota

The quarantine and isolation standards that apply to EIA-positive horses in North Dakota align with the national USDA APHIS framework, which sets minimum requirements that all states must meet or exceed.

A confirmed EIA-positive equid must be euthanized or quarantined for life 200 yards away from any EIA-negative equid, per USDA EIA program rules. The 200-yard separation distance is specifically designed to reduce the risk of insect-borne transmission, since biting flies that carry the virus typically do not travel that far between feeding sites.

Horses testing positive for EIAV are required by law to be permanently identified via branding or tattooing and be quarantined. Transportation and housing are severely restricted. This means you cannot move a confirmed positive horse to another property, sell it, donate it, or transport it for any purpose without explicit authorization from state and federal animal health officials.

Federal and state health agencies, as well as the American Association of Equine Practitioners, support euthanasia as the most prudent option. Lifelong quarantine in a screened stall is another, less acceptable alternative. The quarantine-for-life option is rarely chosen in practice because maintaining a truly insect-proof environment 24 hours a day is extremely difficult and expensive.

EIAV-positive horses will always pose an unnecessary health risk to other horses, whether or not they show signs of illness. Even in the best management situations, blood-sucking insects cannot be totally controlled or eliminated. This biological reality is why regulators strongly favor euthanasia as the primary response to a confirmed positive.

For horses on the same premises that were potentially exposed but initially test negative, a quarantine period applies until follow-up testing confirms their status. This quarantine restricts movement of those animals off the property until the NDDA and USDA are satisfied that no further spread has occurred.

Key Insight: If you purchase a horse from out of state, always request a copy of the current Coggins certificate before the animal arrives on your property. Introducing an untested horse to your herd and then receiving a positive result could place your entire operation under quarantine.

Penalties for Non-Compliance in North Dakota

Failing to comply with North Dakota’s EIA testing and documentation requirements carries real consequences. The state enforces these rules through the NDDA Animal Health Division, and violations can result in fines, seizure of animals, and criminal charges depending on the severity of the offense.

Depending on the state, owners can face fines of up to $25,000 or more per horse for transporting animals without required documentation. North Dakota’s penalties fall under the authority granted by NDCC Title 36, which governs animal health and disease control across the state.

Specific violations that can trigger enforcement action include:

• Importing horses into North Dakota without a valid negative EIA test result (within 12 months) and a current CVI
• Transporting a horse to a show, rodeo, sale, or boarding facility without current Coggins documentation
• Moving a confirmed EIA-positive horse off a quarantined premises without authorization
• Failing to report a positive EIA test result to the NDDA and USDA APHIS as required
• Using an expired or falsified Coggins certificate for any regulated movement

Beyond state penalties, USDA APHIS can pursue federal enforcement action for violations involving interstate movement of EIA-positive horses or falsification of federal health documents. Federal penalties under the Animal Health Protection Act can reach tens of thousands of dollars per violation.

If you are stopped at a highway livestock checkpoint or turned away from an event for missing documentation, the most immediate consequence is that your horses can be held until proper paperwork is produced. Your horses can be held at the checkpoint until paperwork is produced. This is not theoretical — it happens. Keep your Coggins certificate and CVI in your truck cab on every trip, not buried in the trailer tack room.

Staying current on North Dakota’s animal health rules extends well beyond EIA. If you own or manage animals in the state, it is worth reviewing related regulations such as roadkill laws in North Dakota, leash laws in North Dakota, and pit bull laws in North Dakota to ensure full compliance across your operation. Horse owners who also hunt or fish may find it useful to check pheasant hunting season in North Dakota and bass fishing season in North Dakota for other seasonal regulatory requirements.

For the most current North Dakota EIA and Coggins test requirements, contact the NDDA Animal Health Division directly or consult a USDA-accredited veterinarian licensed in North Dakota. The American Association of Equine Practitioners also publishes regularly updated EIA guidelines that provide detailed clinical and regulatory guidance for horse owners and practitioners alike.