There have been no additional cases of EHV-1 at the racetrack in Maricopa County, Arizona, since the index case in February.

The horse resides in Pierce County, where 4 additional cases are suspected.

The sick horse lives in Gem County, where 6 additional cases are suspected and 25 horses are exposed.

Two additional horses at a barn in Bay County have tested positive for strangles, bringing the total number of cases to seven.

The horse lived in San Luis Obispo County and has been euthanized, but 26 horses are potentially exposed.

One horse in York County is positive for respiratory equine herpesvirus, and 40 horses are exposed.

One horse is positive for EHV-1 in Simcoe County, and another horse is suspected positive.

One horse at the racetrack in Maricopa County, Arizona, has tested positive, and 36 horses are exposed.

The mare resides in Shiawassee County and is under voluntary quarantine.

A gelding in Macomb County is under voluntary quarantine.

The horse resides in Oklahoma County, where six others are exposed.

The horses reside in Bay County.

The horse resides in Van Buren County, where 4 additional cases are suspected.

The horse resides in Hood County and is under official quarantine.

One horse in Lee County is positive for strangles, one horse is suspected positive, and four horses are exposed.

The horse resides in Hampshire County, where 3 additional cases are suspected.