Two additional EHV-1 cases confirmed:Two (2) additional horses on the affected premises have been confirmed positive by nasal swab for the neuropathogenic strain of EHV-1. The only clinical sign displayed by these two horses was a fever.
The affected premises is under quarantine and the thirteen (13) other horses currently on the property are being monitored. Current epidemiologic investigation findings indicate minimal risk of disease spread from this closed premises.
August 23, 2011: Confirmed case of EHV-1 neurotropathogenic strain
On August 23, 2011, a 15 year old Oldenburg mare from Sonoma County has confirmed positive for the neuropathogenic strain of Equine Herpes Virus-1. The mare is isolated, quarantined and undergoing treatment at a veterinary referral hospital. The premises of origin is under veterinary observation and the potentially exposed horses temperatures are being monitored twice daily.
Epidemiologic investigation conducted by CDFA reveals minimal disease risk based on lack of animal movement on and off the affected premises. The investigation has determined the positive horse has no direct link to the May 2011 outbreak of EHV-1 in cutting horses which resulted in 22 positive confirmed equine cases in California. CDFA staff will continue to monitor the situation to ensure disease control.