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What is this test?

The Babesia caballi Antibody test is a blood test that looks for antibodies (immune proteins) against Babesia caballi, a microscopic parasite that infects red blood cells in horses. The test uses a special technique called immunofluorescence to detect whether your horse's immune system has responded to this parasite.

Why is this test performed?

This test is performed to help diagnose equine babesiosis (also called piroplasmosis), a disease caused by Babesia caballi. It is especially useful when horses show symptoms such as fever, weakness, pale gums (anemia), yellowing of the eyes or gums (jaundice), dark urine, or loss of appetite. The test is also used for screening horses that may have been exposed to ticks, for monitoring treatment success, and for testing horses before travel or competition.

How is the sample collected?

A small blood sample is drawn from your horse's vein, usually from the neck or leg. This blood is then sent to a laboratory where it is processed to separate the serum (the liquid part of blood) from the blood cells. The serum is then tested using immunofluorescence to detect antibodies against Babesia caballi.

What do the results mean?

A positive result means antibodies against Babesia caballi were detected in the blood, indicating that your horse has been infected with the parasite at some point. A negative result means no antibodies were detected, suggesting your horse has not been infected. However, it takes time for the body to produce detectable antibodies, so very early infections may show negative results. Your veterinarian will interpret the results along with your horse's symptoms and other test findings.