5-9-2014 EHV-1 update from Stillwater Equine clinic: We are feeling optimistic and think (hope) that it is time for one last summary (we are now 15 days from the last cluster of cases): This outbreak of EHV-1 non neurotropic was a two month (March and April 2014) episode mainly involving one disciple (barrel 12/14) and involved 7 states (MN, WI, ND, SD, IA, KS, NE). We do not know that all of these cases are tied together but the timing and disciple of the horses involved is suspicious that they might tie together. Some of the keys to stopping this outbreak were the following: Early detection of EHV-1 infection horses: Some effected barn owners mentioned that they had the worse “cold” go through the barn this winter. Early detection (swabbing) of the virus may have prevented or slowed this outbreak. We rarely swabbed horses in the past but we will likely be much more proactive in the future. (As a side note one of the suspect horses that was swabbed was found to have EHV-4 and one was found to have Rhinitis). Early detection and quarantine of EHM (neuro) and separation of EHV (febrile horses): Key in stopping the outbreak was a 21-28 day quarantine of the barns with EHM horses, and separating any EHV horses (febrile) to stop the domino effect. EHM (Equine Herpes Virus Myeloencephalopathy) is the neurologic form of EHV. The no travel period was likely helpful. Education(biosecurity) and communication (social media) were very helpful. EHV-1 Outbreak MSP (Minneapolis St Paul) Case 0 WI St Croix County high suspicion euthanized 2/15/2014 Case 1 MN Chisago Euthanized EHV-1 positive 3/8/2014 Case 2 MN Chisago Recovering EHV-1 positive 3/8/2014 Case 3 MN Dakota Euthanized EHV-1 positive 3/18/2014 Case 4 WI Polk Recovering EHV-1 positive3/20/2014 Case 5 MN Hennepin Recovering EHV-1 positive 3/21/2014 Case 6 MN Freeborn Recovering Test positive 3/26/2014 Case 7 MN Wright Test positive 3/26/2014 Case 8 Iowa and MN Freeborn and Hennepin Positive 3/26/2014 Case 9 MN Wright county Test positive 3/29/2014 Case 10 WI St Croix County Recovering Test positive 4/4/2014 Case 1+2 are on the same farm Case 0 + 10 are on the same farm 10 cases (MN 7 WI 2 Iowa 1) 10 cases ( Barrel horses or Game horses 7/10 ) 10 cases (Northern suburbs 8/10 ) EHV-1 cases in north Dakota ND Case 1 January 2014 on a closed herd ND Case 2 February 2014 same closed herd ND Case 3 April 5 2014 barrel horse EHV-1 cases from Lincoln Nebraska event NE Case 1 WI Lafayette County Euthanized 4/24/2014 test positive NE Case 2 KS Northeast Kansas Euthanized 4/24/2014 test positive Case 1 and Case 2 were stabled in the same barn very close to each other during the BRF ( April 10-13 2014). EHV-1 case South Dakota SD Case 1 Brown County, S.D., 4/24/2014 test positive This case is a horse that came from MN to SD and is in a barn with barrel horses.
Posted on: Fri, 09 May 2014 14:59:49 +0000
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