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Updates on current disease outbreaks are listed here as they occur and will include the date listed, disease name, location and current status. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.



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Equine Herpesvirus- Respiratory
Marion County, OR
Alert ID: 44
June 03, 2015
May 31, 2015--A new case of Equine Herpes Virus-1 (EHV-1) has been confirmed in Oregon over the weekend according to the Oregon Department of Agriculture. The 14-year old Quarter Horse gelding from Marion County is hospitalized at the Oregon State University College of Veterinary Medicine’s Large Animal Hospital after being admitted for sudden onset of neurologic signs of the disease. The horse has tested positive for both the wild type and the more serious neuropathogenic form of EHV-1. Despite other cases of EHV-1 in Oregon in recent weeks, this detection is being classified as a new case because of the length of time and lack of strong epidemiological links to previous EHV-1 instances. The affected horse has not travelled or attended any shows or events for at least four months. The stable has been quarantined and all horses involved remain under active observation by owners and their veterinarians for clinical signs of disease. Six of the eight quarantines associated with the previous EHV-1 cases have been released and two are pending.
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