California veterinarian EHV incident Melissa Tyson, a veterinarian-horse owner is in trouble after reportedly violating the EHV-1 quarantine in 2016 at the Los Angeles Equestrian Center.

EHV Quarantine Violated by California Veterinarian

Veterinarian-owner pulls EHV quarantined horse – EXCLUSIVE

A California veterinarian-horse owner is in trouble after reportedly violating the EHV-1 quarantine at the Los Angeles Equestrian Center. The woman trailered a sick horse

The California Department of Food and Agriculture says it intends to pursue the violation to the full extent that the quarantine authority laws allow. W. Kent Fowler, DVM, Animal Health Branch Chief for the agency tells us due to the on-going investigation he is unable to comment further regarding the incident.

Dr. Fowler would not confirm the veterinarian’s name or discuss the specific penalties she may face.

The febrile horse with equine herpesvirus myeloencephalopathy (EHM) was quarantined at Burbank’s LAEC when the veterinarian owner removed her horse. EHM is the neurological form of EHV-1.

New location

The state imposed a quarantine at the horse’s new location reportedly in Pasadena.

Enhanced biosecurity measures are in place in all quarantine and isolation barns at LAEC. Veterinarians confirmed 13 horses positive with the virus at LAEC, while eight are suffering from EHM and five have EHV-1. The last horse confirmed positive was on November 26 following a second nasal swab test.

EHV-1 is highly contagious and typically has an incubation period of 2 to 10 days. Veterinarians recommend vaccinating against EHV-1 to help prevent the virus. No current vaccine prevents the neurological manifestation of the infection.

Experts recommend limiting horse to horse contact, limiting horse to human contact, and avoiding communal water sources when at public horse facilities. Additionally, they also state you shouldn’t share equipment unless it is disinfected between uses.

The state anticipated ending the quarantine at LAEC on December 6 although that date is no longer possible.


February 2018

View California Veterinary Medical Board complaint against Melissa Tyson, DVM 

Tyson operates Crown City Veterinary Medical Group, Inc. and is the President of the Asper de Tyson Foundation and Sanctuary.



November 2019 

Get full details regarding the Veterinary Medical Board’s decision here.