The Michigan Department of Agriculture and Rural Development (MDARD) confirms a second horse tested positive for the equine herpes virus (EHV-1). The infected horse was already under quarantine in Livingston County due to it’s exposure to the index horse. It is receiving veterinary care.
Horses in four counties are quarantined due to information obtained during the epidemiologic investigation. Livingston, Barry, Ionia, and Saginaw Counties are affected. A total of 15 horses from those counties have been tested for EHV-1. To date, only the one has tested positive since the original case of EHV-1.
The index horse was an eight-year-old barrel racer that tested positive on March 19th for EHV-1. Despite treatment, the gelding was euthanized on March 21st.
MDARD states the horse competed in Barry County on February 28th and March 7th. The horse also trained at a facility in Livingston County on March 9th, 11th and 14th.
The state continues to look for horses that may have been exposed to the index horse. Horse owners are asked to help by voluntarily following the exposed-horse protocol. It includes isolating horses that may have been exposed, taking horses’ temperatures twice daily for 28 days, and calling the vet if a horse’s fever is over 101.5 or if they exhibit any symptoms of EHV-1.
Two Ohio barrel racing horses have also been confirmed with EHV-1. One was euthanized. There is no known connection between the two states’ cases, according to Ohio state officials.