Epidemiological Aspects of Equid Herpesvirus-Associated Myeloencephalopathy (EHM) Outbreaks

Equid Herpesvirus Myeloencephalopathy (EHM) is a multifactorial disease following an EHV-1 infection in Equidae. We investigated a total of 589 horses on 13 premises in Europe in search of risk factors for the development of EHM. We found that fever (<i>p</i> < 0.001), increasing age...

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Main Authors: Eva Klouth, Yury Zablotski, Jessica L. Petersen, Marco de Bruijn, Gittan Gröndahl, Susanne Müller, Lutz S. Goehring
Format: Article
Language:English
Published: MDPI AG 2022-11-01
Series:Viruses
Subjects:
Online Access:https://www.mdpi.com/1999-4915/14/11/2576
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author Eva Klouth
Yury Zablotski
Jessica L. Petersen
Marco de Bruijn
Gittan Gröndahl
Susanne Müller
Lutz S. Goehring
author_facet Eva Klouth
Yury Zablotski
Jessica L. Petersen
Marco de Bruijn
Gittan Gröndahl
Susanne Müller
Lutz S. Goehring
author_sort Eva Klouth
collection DOAJ
description Equid Herpesvirus Myeloencephalopathy (EHM) is a multifactorial disease following an EHV-1 infection in Equidae. We investigated a total of 589 horses on 13 premises in Europe in search of risk factors for the development of EHM. We found that fever (<i>p</i> < 0.001), increasing age (<i>p</i> = 0.032), and female sex (<i>p</i> = 0.042) were risk factors for EHM in a logistic mixed model. Some breeds had a decreased risk to develop EHM compared to others (Shetland and Welsh ponies; <i>p</i> = 0.017; <i>p</i> = 0.031), and fewer EHV-1-vaccinated horses were affected by EHM compared to unvaccinated horses (<i>p</i> = 0.02). Data evaluation was complex due to high variability between outbreaks with regards to construction and environment; viral characteristics and the virus’s transmissibility were affected by operational management. This study confirms earlier suspected host-specific risk factors, and our data support the benefit of high vaccine coverage at high-traffic boarding facilities.
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spelling doaj.art-e1697fc78fbc43818a23d567ed9a48d52023-11-24T10:19:31ZengMDPI AGViruses1999-49152022-11-011411257610.3390/v14112576Epidemiological Aspects of Equid Herpesvirus-Associated Myeloencephalopathy (EHM) OutbreaksEva Klouth0Yury Zablotski1Jessica L. Petersen2Marco de Bruijn3Gittan Gröndahl4Susanne Müller5Lutz S. Goehring6Center for Clinical Veterinary Medicine, Faculty of Veterinary Medicine, Ludwig-Maximilians University, 80539 Munich, GermanyCenter for Clinical Veterinary Medicine, Faculty of Veterinary Medicine, Ludwig-Maximilians University, 80539 Munich, GermanyDepartment of Animal Science, University of Nebraska, Lincoln, NE 68588, USAWolvega Equine Hospital, 8474 EA Oldeholtpade, The NetherlandsNational Veterinary Institute (SVE), 75189 Uppsala, SwedenBaden-Wuerttemberg Animal Health Services, 70736 Fellbach, GermanyM.H. Gluck Equine Research Center, College of Agriculture, Food and the Environment, University of Kentucky, Lexington, KY 40506, USAEquid Herpesvirus Myeloencephalopathy (EHM) is a multifactorial disease following an EHV-1 infection in Equidae. We investigated a total of 589 horses on 13 premises in Europe in search of risk factors for the development of EHM. We found that fever (<i>p</i> < 0.001), increasing age (<i>p</i> = 0.032), and female sex (<i>p</i> = 0.042) were risk factors for EHM in a logistic mixed model. Some breeds had a decreased risk to develop EHM compared to others (Shetland and Welsh ponies; <i>p</i> = 0.017; <i>p</i> = 0.031), and fewer EHV-1-vaccinated horses were affected by EHM compared to unvaccinated horses (<i>p</i> = 0.02). Data evaluation was complex due to high variability between outbreaks with regards to construction and environment; viral characteristics and the virus’s transmissibility were affected by operational management. This study confirms earlier suspected host-specific risk factors, and our data support the benefit of high vaccine coverage at high-traffic boarding facilities.https://www.mdpi.com/1999-4915/14/11/2576risk factorboarding facilityagebreedsexvaccination
spellingShingle Eva Klouth
Yury Zablotski
Jessica L. Petersen
Marco de Bruijn
Gittan Gröndahl
Susanne Müller
Lutz S. Goehring
Epidemiological Aspects of Equid Herpesvirus-Associated Myeloencephalopathy (EHM) Outbreaks
Viruses
risk factor
boarding facility
age
breed
sex
vaccination
title Epidemiological Aspects of Equid Herpesvirus-Associated Myeloencephalopathy (EHM) Outbreaks
title_full Epidemiological Aspects of Equid Herpesvirus-Associated Myeloencephalopathy (EHM) Outbreaks
title_fullStr Epidemiological Aspects of Equid Herpesvirus-Associated Myeloencephalopathy (EHM) Outbreaks
title_full_unstemmed Epidemiological Aspects of Equid Herpesvirus-Associated Myeloencephalopathy (EHM) Outbreaks
title_short Epidemiological Aspects of Equid Herpesvirus-Associated Myeloencephalopathy (EHM) Outbreaks
title_sort epidemiological aspects of equid herpesvirus associated myeloencephalopathy ehm outbreaks
topic risk factor
boarding facility
age
breed
sex
vaccination
url https://www.mdpi.com/1999-4915/14/11/2576
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