Equine Infectious Anaemia (EIA) - Coggins / AGID Test
The Coggins test is a blood test that looks for antibodies to the equine infectious anaemia (EIA) virus. It can help your vet find horses that carry the virus, and some buyers, events and authorities ask for the result.
- Sample
- Serum (plain)
- Quantity
- As advised
- Report
- Confirmed when you book
- Collection
- Free in Bhopal
What this test checks
- Antibodies to the EIA virus in the horse's serum
- Whether the horse has been infected with the virus, even if it looks healthy
- A result your vet can read with the horse's signs and history
Benefits of this test
- Finds horses that carry the virus but look healthy.
- Needs only one blood sample.
- Gives a result that buyers, events and authorities may ask for.
- Helps your vet decide on the next step to protect other horses.
- Can be repeated if the first test was done very early in an infection.
Often discussed at these ages:Adult Horse
When your vet may advise it
- Before buying, selling or moving a horse, when the buyer or authority asks for a Coggins result.
- Before a horse joins a stable, a fair or a show where other horses gather.
- A horse with fever, weakness, weight loss or pale gums and no clear cause.
- After a horse has been in contact with a horse that tested positive.
- Routine screening of a stable, as your vet advises.
About this test
Equine infectious anaemia, or EIA, is a viral disease of horses. The virus spreads through blood, mainly by biting flies, and also by needles, syringes or equipment that carry blood from one horse to another. Some horses with EIA have fever, weakness, weight loss, swollen legs and pale gums. Others look healthy but still carry the virus and can pass it on. Because a horse that looks well can still be infected, a blood test is the only way to know.
The Coggins test, also called the AGID test, looks for antibodies in serum, the clear part of the blood. Antibodies are proteins that the body makes against a germ. If the test finds antibodies to the EIA virus, the horse has been infected. ELISA is another method that looks for the same antibodies, and the lab confirms which method is used when you book. A very recent infection may not show antibodies yet, so a horse can test negative early on, and your vet may advise a repeat test.
EIA is a notifiable disease, so owners should tell their veterinarian or the animal husbandry department if a result is positive. Some buyers, horse events and authorities also ask for a recent negative Coggins result before a horse is moved or sold. A registered veterinarian reads the result together with the horse's signs and history and explains the next step. This page gives no advice on treatment.
How to prepare
No fasting is needed. Your vet or the lab collector takes blood into a plain tube, and the horse should be handled gently and safely. The lab confirms the method, sample needs and reporting time when you book.
Reading the result
A registered veterinarian reads the result together with the horse's signs and history. A positive result means antibodies were found, which shows infection with the virus. A negative result usually means no infection, but a very early infection can be missed, so your vet may advise a repeat test. Tell your veterinarian or the animal husbandry department about a positive result.
Questions about EIA Coggins
What is a Coggins test for horses?
Why is a Coggins test asked for when buying or moving a horse?
Can a horse test negative and still have EIA?
What should I do if my horse tests positive for EIA?
Before you book this test
Why this notice: so you know, before you book, how a test is done, what its limits are and who is responsible.
- Where it is tested. Some tests are done wholly or partly by an independent partner laboratory. The lab tells you before booking if this test is sent out, and the report names the laboratory that did it.
- What a result can and cannot tell you. No test is right every time. A normal result does not rule out every disease, and an abnormal result does not prove one. A registered veterinarian should read the report with the animal’s signs and history before any treatment is started, changed or stopped.
- The sample. A sample that is clotted, too small, wrongly labelled, leaking or too old may be rejected or reported with a note, and the lab may ask for a fresh one.
- Reporting time. Confirmed when you book. Times are estimates, not guarantees, and the lab confirms the time when you book.
- Emergencies. A booking or a pending report must not delay urgent care. If an animal has collapsed, struggles to breathe, has fits or bleeds heavily, call a veterinarian at once.
Please read our Terms of Service, Medical Disclaimer, Privacy Policy and Refund and Cancellation Policy. Pashupatinath Vet Lab is operated by Duaji Healthcare and Tech Private Limited. This page is general information and does not replace a veterinarian’s advice.
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