A horse in Orange County, California, was confirmed with neurologic herpesvirus.
The first positive EHM case for Michigan in 2018 was diagnosed in Washtenaw County.
Six horses in five counties have tested positive for Eastern equine encephalitis (EEE) in Florida.
Florida is now up to 14 official strangles quarantines in 2018.
Three Maryland farms that had horses present at the EHV-1 premises in Virginia have been placed on "hold."
The Arizona state veterinarian alerted horse owners of a positive EHM cutting horse that had been at South Point Arena in Nevada and a show in the state.
The Office of the Wyoming State Veterinarian has confirmed that all quarantines have been released except the one at the Ag Complex in Wright, which is due to be released on Friday, March 2.
Three barns at The Meadows Racetrack in Pennsylvania remain under EHM quarantine.
Florida officials reported that a premise in Escambia County and two premises in Alachua County were quarantined for equine strangles.
A lead pony at Los Alamitos Race Course in California was euthanized due to neurologic herpesvirus.
A horse barn in Chester County has been quarantined for EHV-1.
A 4-year-old Thoroughbred filly was euthanized due to complications of equine herpesvirus myeloencephalopathy at Belmont Park.
The Michigan Department of Agriculture and Rural Development has confirmed a case of strangles in an 8-year-old Quarter Horse mare from Wayne County.
The Arizona Department of Agriculture confirmed a case of equine herpesvirus myeloencephalopathy (EHM due to equine herpesvirus type 1: wild strain) in a horse at Turf Paradise in Maricopa County.
All three quarantined premises, which contain 26 quarantined horses total, are instituting biosecurity practices.
A mare in Gooding County, Idaho, was euthanized due to EHM. A mare in Gem County aborted due to EHV-1.
A premises in Bedford County, Virginia, has been released from an equine strangles quarantine that started in late 2017.
The quarantine for EHV-1 at and biosecurity on the affected barn at Turfway Park was raised to Alert Status by the Kentucky Department of Agriculture. No new cases have been diagnosed.
On January 31, 2018, the Virginia Department of Agriculture and Consumer Services (VDACS) confirmed a diagnosis of equine herpesvirus myeloencephalopathy (EHM) in a horse in central Virginia.
The Florida Department of Agriculture and Consumer Services has confirmed equine strangles in Lake and Walton Counties and EEE in St. Johns County in January 2018.
The Oregon Department of Agriculture is reporting that a case of wild type EHV-1 has been detected at the Portland Meadows racetrack.
A neurologic Standardbred at The Meadows racetrack in Pennsylvania has tested positive for EHV-1.
24 horses have been reported as affected with equine influenza in Bibb County, Georgia, with 57 horses exposed.
A horse in Albemarl County, Virginia, has tested positive for EHV-1 after exposure to the EHM horse at New Bolton Center.
Eight trace-forward premises and one trace-back premise have been placed under quarantine for equine herpesvirus.
A racehorse at Laurel Park tested positive on nasal swab for EHV-1 wild type, but negative on whole blood.
Florida starts the new year with cases of equine strangles in Suwannee and Lake Counties.