Environmental persistence of equid herpesvirus type-1.
Authors: Saklou Nadia T, Burgess Brandy A, Ashton Laura V, Morley Paul S, Goehring Lutz S
Journal: Equine veterinary journal
Summary
# Environmental Persistence of Equid Herpesvirus Type-1 Equid herpesvirus type-1 (EHV-1) remains endemic in horse populations worldwide, responsible not only for primary respiratory infection but also serious secondary complications including abortion in late pregnancy and neurological disease (equine herpesvirus myeloencephalopathy). Given that contaminated stabling environments—typically constructed from unsealed timber with absorbent bedding materials—facilitate viral transmission and persist as infection reservoirs, understanding how long EHV-1 survives outside the host is crucial for effective biosecurity protocols. Saklou and colleagues investigated the environmental stability of EHV-1 under various conditions to establish realistic disinfection timelines and strategies for equine facilities. The researchers' work highlighted the critical vulnerability of EHV-1's lipid envelope to environmental factors including temperature, humidity and surface material, suggesting that whilst persistent environmental contamination can occur, strategic use of these physical conditions alongside targeted disinfection offers a practical approach to reducing transmission risk. For equine professionals managing outbreak situations or designing stable facilities, these findings underscore the importance of environmental management as a complement to vaccination and quarantine protocols, particularly the potential to exploit natural environmental degradation of the virus rather than relying solely on chemical disinfectants that may be ineffective in porous, organic bedding materials.
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Practical Takeaways
- •EHV-1 environmental contamination in typical horse housing is difficult to eliminate completely, requiring consideration of the virus's environmental persistence characteristics
- •Understanding that the viral envelope is vulnerable to environmental conditions allows practitioners to optimize stable management and disinfection protocols
- •Housing design and material selection (sealed vs. unsealed wood, bedding type) should be considered in EHV-1 prevention and control strategies
Key Findings
- •EHV-1 is ubiquitous in equine populations and causes respiratory disease with serious complications including abortion and neurological disease
- •Environmental persistence of EHV-1 in housing with unsealed wood and porous bedding materials presents eradication challenges
- •The viral envelope's susceptibility to environmental conditions may be exploited for control strategies