Scott Dunn's Equine Clinic

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Equine Herpes Virus

EQUINE HERPES VIRUS

Classified into 4 types:-

EHV 1 Equine abortion virus
EHV 2 Equine cytomegalo virus
EHV 3 Equine coital exanthema virus
EHV 4 Equine rhinopneumonitis

EHV 1 and 4 are the major causes of disease in this group.
EHV 1 causes abortion, respiratory disease and occasionally paralysis.
EHV 4 is an important respiratory virus and a more common cause of respiratory disease in young horses than EHV 1.

CLINICAL SIGNS OF EHV 1

a) Abortion, usually during the last 3 months of pregnancy.
b) Mild temperature, watery nasal discharge, intermittent cough.
c) Neurological form – starts as varying degrees of ataxia (unsteadyness) ranging from mild swaying to collapse.

EHV 4

Mild temperature, watery nasal discharge, intermittent cough.

TREATMENT

Vaccination
There are two vaccinations available:
(i)   Duvaxyn EHV 1,4
(ii)  Equilis Resequin – combined influenza and EHV 1,4

Primary vaccination course
1st vaccination
2nd vaccination after 4-6 weeks
Booster vaccinations
Every 6 months