More Equine Piroplasmosis Cases Reported

Animal health authorities have discovered more cases of equine piroplasmosis, including 13 positive horses tested as part of a routine racetrack screening program in New Mexico, and one horse in Texas that was a cohort of a positive trace-out from an ongoing investigation.

The information was included in a Jan. 25 report issued to the World Organization for Animal Health (Office I

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Animal health authorities have discovered more cases of equine piroplasmosis, including 13 positive horses tested as part of a routine racetrack screening program in New Mexico, and one horse in Texas that was a cohort of a positive trace-out from an ongoing investigation.

The information was included in a Jan. 25 report issued to the World Organization for Animal Health (Office International des Epizooties, or OIE) by John Clifford, DVM, deputy administrator of the USDA's Animal and Plant Health Inspection Service. See the report.

Preliminary results of the New Mexico investigation indicate that transmission of the organism might have resulted from management practices (use of shared needles or substances between horses) rather than by a tick vector, the OIE report noted. The source of this infection is unknown. More than 3,000 New Mexico horses have been tested via the screening program. The New Mexico Livestock Board euthanized five of the positive horses, while the others remain under quarantine.

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Written by:

Erin Ryder is a former news editor of The Horse: Your Guide To Equine Health Care.

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