Coggins Test Requirements in Pennsylvania: What Every Horse Owner Must Know

If you own, sell, show, or transport horses in Pennsylvania, you need to understand the state’s Equine Infectious Anemia (EIA) testing rules — and the consequences of ignoring them. Pennsylvania treats EIA as a designated dangerous transmissible disease, and the regulations that govern Coggins testing apply to a wide range of equine activities, from trail rides to commercial sales.

Whether you’re a lifelong horse owner or new to the Commonwealth’s equine community, this guide walks you through every layer of the state’s EIA and Coggins test requirements, from which animals are covered and when testing is mandatory to what happens if your horse tests positive.

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

Equine Infectious Anemia is a designated “dangerous transmissible disease” under Pennsylvania’s Domestic Animal Law and is defined as an infectious disease of equines caused by a virus classified in the Lentivirus genus, family Retroviridae. You may also hear it called “Swamp Fever.” The disease affects horses, mules, donkeys, and other members of the equid family.

Infected animals may exhibit a range of clinical signs including fever, depression, muscle weakness, thrombocytopenia, anemia, jaundice, tachycardia, mucous membrane hemorrhages, and collapse — and infection may lead to death. Most often, however, horses with EIA are asymptomatic carriers — showing no signs or symptoms — which is one of the reasons testing is so important.

There is no specific treatment for infected animals and no vaccine to prevent infection. Efforts to control EIA in the United States started in 1972, and since then the estimated national prevalence has dropped from nearly 4 percent to 0.004 percent of the equine population. Pennsylvania has a significant stake in maintaining that progress.

EIA is of concern to the entire Pennsylvania equine industry. According to a 2017 survey report by the American Horse Council, Pennsylvania ranked eighth in the total number of horses in the United States, with over 223,000 horses at the time of the survey, and the Commonwealth has a large Thoroughbred and Standardbred racing industry.

Since 2017, a new high-risk population for EIA infection has emerged: current or former Quarter Horse racehorses, many with ties to unsanctioned (bushtrack) racing. The primary method of spread in this population is the human-facilitated transfer of EIA-contaminated blood or blood products from infected to uninfected horses — a process called iatrogenic transmission.

Key Insight: Because EIA has no cure and no vaccine, testing is the only reliable tool for keeping infected horses from mixing with healthy ones. Pennsylvania’s regulations are designed specifically around this reality.

Which Animals Require a Coggins Test in Pennsylvania

Pennsylvania requires a current EIA test — within 12 months — for all equines in the state 6 months of age or older that are “exhibited, shown, sold, exchanged, transferred, leased, bartered or given away.” This broad language means the requirement applies well beyond formal horse shows or racetracks.

EIA is a viral disease impacting horses, mules, and donkeys. All three species fall under Pennsylvania’s testing mandate when involved in any of the covered activities listed above. Ponies and other equids in the family Equidae are also included under the state’s definition of “equine.”

The foal exemption is narrow but important. A foal under six months of age is exempt from the EIA test requirement only if the foal accompanies a test-negative dam, and the foal must be included on the Interstate Certificate of Veterinary Inspection (ICVI) provided for the dam. A foal traveling into the Commonwealth for any purpose that is not accompanied by its test-negative dam must have an individual ICVI and a negative EIA test.

Horses that remain on their home property and are not involved in any sale, exhibition, transfer, or movement across state lines are not subject to the intrastate testing mandate under the base regulation. A test for equine infectious anemia is not required for intrastate movement of equidae unless required by individual race tracks, fairs, shows, or sales. However, the state’s 2024 Quarantine Order expanded requirements for animals involved in commerce or exhibition — so if your horse participates in any of those activities, the 12-month test rule applies.

When a Coggins Test Is Required in Pennsylvania

Pennsylvania’s testing triggers fall into two broad categories: intrastate activity and interstate movement. Understanding which category applies to your situation determines what paperwork you need and when.

For horses already in Pennsylvania, a current test within 12 months is required any time an equine 6 months of age or older is exhibited, shown, sold, exchanged, transferred, leased, bartered, or given away. This covers a wide range of everyday equine transactions — including private sales, consignments to auction barns, and participation in horse shows or rodeos.

• Horse shows, exhibitions, and fairs
• Sales, auctions, and private transfers of ownership
• Leasing and boarding arrangements that involve transfer
• Rodeos, parades, and organized trail rides
• Racetracks (which may impose their own additional requirements)

Testing records must be maintained by the current owner for a minimum of one year and must be made available to the Pennsylvania Department of Agriculture upon request. Keep both paper and digital copies on hand whenever you transport or present your horse at any event.

Pro Tip: Schedule your annual Coggins test at least two weeks before any planned event, sale, or transport. Lab processing times vary, and arriving at a show or sale without current paperwork can result in your horse being turned away or quarantined on the spot.

How the Coggins Test Works and Approved Testing Methods in Pennsylvania

To perform a Coggins test, a licensed veterinarian must draw blood from the horse and send it to an accredited lab for analysis. The lab conducts a test to detect the EIA antibody — a protein present only if the horse has had the EIA virus — and provides either a positive or a negative result back to the veterinarian, who then shares it with the horse owner.

Pennsylvania recognizes two official testing methods. The agar gel immunodiffusion (AGID) test is the primary official laboratory test for diagnosis of EIA, in which precipitates are formed by the interaction of EIA antigens and antibodies that diffuse through gel. AGID is the most widely accepted procedure and may be referred to as the “Coggins” test; results are recorded as either positive or negative.

The enzyme-linked immunoassay (ELISA) test is also an official test for EIA diagnosis and detects antibodies against one or more antigens of the EIA virus. Results of ELISA tests can be obtained within a few hours, compared to the 24-hour minimum required with the AGID test. The ELISA test is considered a screening test, and a higher number of false-positive results are expected.

False-positive results are more common with the ELISA (C-ELISA) test, and positive results should be verified by a standard AGID (Coggins) test. Foals may also produce false positives due to maternal antibodies passed via colostrum for as long as six months with either test.

Testing must be completed at a USDA-approved laboratory. Only Category II accredited veterinarians, who are authorized to perform accredited duties in the state in which samples are collected, may submit samples to an APHIS-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.

Test Method	Turnaround Time	False Positive Risk	Confirmation Required?
AGID (Coggins)	24–48 hours minimum	Low	No — gold standard
ELISA / C-ELISA	A few hours	Higher	Yes — confirm with AGID if positive

Pennsylvania also accepts digital Coggins certificates. GlobalVetLink digital EIA tests are approved by USDA. Starting April 15, 2020, all veterinarians and laboratories must use USDA-approved EIA test forms for regulatory compliance. Digital certificates are accepted by Pennsylvania officials and can be stored and shared through platforms like GlobalVetLink.

Interstate Movement and Import Requirements in Pennsylvania

If you’re bringing a horse into Pennsylvania from another state, the requirements are layered and non-negotiable. All horses entering the Commonwealth must be accompanied by a negative Coggins test from within 12 months prior to the requested date of entry.

Pennsylvania requires that a Certificate of Veterinary Inspection (CVI) be issued for any horse entering the Commonwealth within 30 days of desired entry, and it must be accompanied by a negative test for EIA obtained within a year from the date of entry. The CVI must be issued by an accredited veterinarian and meet all content requirements under Title 7 of the Pennsylvania Code.

As of 2022, all states require proof of a negative Coggins test for horses crossing a state line. Pennsylvania adds the CVI requirement on top of that baseline, making it one of the more documentation-intensive states for equine imports.

Additional requirements are in place for horses that have been in states where vesicular stomatitis and/or piroplasmosis is prevalent. These requirements include additional testing, examinations, and restrictions based on proximity to the outbreak area. As of December 2020, horses traveling from Colorado, Kansas, Nebraska, New Mexico, Oklahoma, Texas, Utah, and Wyoming may be subject to these additional requirements. Consult your veterinarian before traveling from any of these states.

Horses simply passing through Pennsylvania without unloading are exempt from the import EIA testing requirement. All equids being brought into the Commonwealth must be accompanied by a valid report of a negative EIA AGID or ELISA test performed within the 12 months prior to entry, with the exception of equids being transported through the Commonwealth without unloading.

Important Note: Pennsylvania’s import rules can change in response to active disease outbreaks in other states. Always verify current requirements with the Pennsylvania Department of Agriculture or your accredited veterinarian before travel, particularly during active vesicular stomatitis or piroplasmosis seasons.

For horse owners who frequently travel across state lines, resources like Penn State Extension’s guide on Certificates of Veterinary Inspection offer detailed guidance on documentation timelines and content requirements.

What Happens When a Horse Tests Positive in Pennsylvania

A positive EIA test result sets off an immediate chain of regulatory action. All equids infected with EIA virus remain lifelong carriers, and infected animals are usually euthanized. The state’s response protocol is designed to prevent a single positive animal from spreading the virus to the broader equine population.

A person having knowledge of the existence of equine infectious anemia, or knowledge of an animal afflicted thereby anywhere within the Commonwealth, must immediately send a report of the infection to the Pennsylvania Department of Agriculture, giving the name and address of the owner. This reporting obligation falls on veterinarians, lab personnel, and horse owners alike.

Animal health professionals — including veterinarians, diagnostic laboratories, and public health personnel — report diagnosed or suspected cases of nationally listed reportable animal diseases to USDA APHIS Area Veterinarians in Charge and to the state animal health official as applicable under state reporting regulations.

Once a positive result is confirmed, the Pennsylvania Department of Agriculture initiates an epidemiological investigation. Should the reactor equidae show clinical evidence of equine infectious anemia, or if an epidemiological investigation so indicates, equidae on the premises where the clinical reactor is found shall be quarantined, and movement shall only be allowed after a negative test of the remainder of the animals on the premises at the time the positive animal is disclosed.

If you own other horses that shared a pasture, barn, or trailer with the positive animal, those horses are subject to testing and movement restrictions until they return negative results. The USDA APHIS EIA program page outlines the federal-level coordination that occurs alongside state enforcement in these situations.

Quarantine, Euthanasia, and Isolation Rules in Pennsylvania

EIA is a regulated disease, and the only alternative to euthanasia is permanent isolation through official quarantine of the infected animal at a distance of at least 200 yards from all other equids. These are not temporary measures — they are lifetime requirements for any horse that tests positive.

An equidae infected with equine infectious anemia shall be quarantined on its home farm, or other premises approved by the Department, for the remainder of the horse’s life. The Department may authorize the movement of an infected animal to approved facilities for research or for slaughter.

The 200-yard isolation distance is based on the biology of EIA transmission. EIA is mechanically transmitted via the mouthparts of biting flies, and research has shown that the EIA virus survives for a limited time on the mouthparts of fly vectors, so the area of possible exposure is limited to a relatively small radius around the affected premises. The 200-yard buffer is designed to place uninfected horses outside the effective range of those vectors.

For out-of-state horses that arrive in Pennsylvania without meeting import requirements, the response is equally firm. Any out-of-state equid imported into the Commonwealth in violation of any of the provisions of the Quarantine Order shall be returned to the state, commonwealth, or territory of origin and shall not be allowed access to the Commonwealth for any purpose — including exhibition, show, sale, lease, barter, exchange, or transfer through commerce — until the animal meets the import requirements of the Commonwealth.

If the equid cannot immediately be returned to the state, commonwealth, or territory of origin, the Department shall be notified, and the animal shall be quarantined at a Department-approved quarantine facility until return to origin, until all import requirements are met, or until the animal is euthanized.

Owners of horses that are eligible for high-performance breeds should be especially aware that racing and competition facilities in Pennsylvania often impose their own biosecurity rules on top of state minimums — including more frequent testing intervals and facility-level isolation protocols for new arrivals.

Penalties for Non-Compliance in Pennsylvania

Failing to comply with Pennsylvania’s EIA testing and quarantine requirements carries real legal consequences. The state enforces violations through both criminal and civil channels under the Domestic Animal Law.

It is unlawful for any person to violate any provision or term of the Quarantine Order or any other standards established at section 2329(f) of the Domestic Animal Law (3 Pa.C.S.A. § 2329(f)). This statute-backed prohibition means that non-compliance is not treated as a minor administrative matter.

A person who violates the Quarantine Order may be assessed a civil penalty of up to $300 with respect to each violation, and may also be assessed an additional civil penalty of up to $20,000 with respect to each violation.

In addition to any other action or remedy sought, the Department may seek any civil remedy specifically established at section 2386 of the Domestic Animal Law (3 Pa.C.S.A. § 2386) for any violation of the provisions of the Quarantine Order. Civil remedies can include injunctions, cost recovery, and other equitable relief beyond the per-violation fines.

• Moving a non-tested equine to a show, sale, or exhibition
• Transporting a horse into Pennsylvania without a valid CVI and negative EIA test
• Failing to report a known or suspected EIA-positive animal
• Moving a quarantined horse without Department authorization
• Failing to maintain testing records for at least one year

Compliance and assurance of compliance with the provisions and terms of the Quarantine Order is the responsibility of all persons, individuals, businesses, and entities subject to its terms. That means buyers, sellers, show organizers, boarding facilities, and haulers can all face liability if a non-compliant horse moves through their hands.

The Pennsylvania Department of Agriculture Bureau of Animal Health handles enforcement and can be reached at 717-772-2852 or by email at RA-ahds@pa.gov. For questions about specific transport scenarios, consult an accredited veterinarian familiar with Pennsylvania’s requirements before you move any horse.

Staying current on your Coggins testing is also good practice from a broader biosecurity standpoint. All owners should take precautions by testing their horses for EIA annually and following good biosecurity protocols when bringing their horses to events, including group trail rides, rodeos, parades, and horse shows. Pennsylvania’s regulatory framework gives those best practices the force of law — and the penalty schedule makes non-compliance an expensive gamble.

For more on Pennsylvania animal regulations, see our guides on rabies vaccine requirements in Pennsylvania, livestock trailer requirements in Pennsylvania, and fishing license requirements in Pennsylvania. If you’re interested in Pennsylvania’s broader wildlife and animal diversity, explore our resources on black snakes in Pennsylvania, woodpeckers in Pennsylvania, and types of hawks in Pennsylvania.