A Sept. 15 report on the cases of equine piroplasmosis earlier this year in Missouri and Kansas declares the outbreak resolved. Three positive horses that were removed from quarantine remain missing. (See the report.)

In June animal health officials confirmed equine piroplasmosis in Missouri after a horse formerly stabled at the Raytown Equestrian Park was hospitalized and found to be positive for the disease, setting off a foreign animal disease investigation. The stable, home to 64 equids, was placed under quarantine on June 6.

On June 17, someone removed two bay Quarter Horses that had been confirmed positive for causative organism Theileria equi from the Raytown quarantine. As of Sept. 15, these horses have not been located. Another five positive horses there were euthanized June 18 with their owners’ consent.

A June 26 World Organization for Animal Health (or OIE) statement noted a third positive horse was also illegally removed from quarantine in Kansas. A spokesman for the Animal and Plant Health Inspection Service said the Kansas horse was a gray mare that had originated from the Raytown premises