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Also reported in: titer
No significant changes in EHV-1/4 antibody titers were detected. Negative a blood antibody test makes active infection unlikely, though many adult horses have low background titers from prior exposure or vaccination. Paired acute and convalescent titers (2-4 weeks apart) provide the most reliable diagnosis.
No significant changes in EHV-1/4 antibody titers were detected. Negative a blood antibody test makes active infection unlikely, though many adult horses have low background titers from prior exposure or vaccination. Paired acute and convalescent titers (2-4 weeks apart) provide the most reliable diagnosis.
No action needed. Continue routine EHV vaccination as recommended by your veterinarian. Pregnant mares should receive EHV-1 vaccination at 5, 7, and 9 months of gestation to prevent abortion.
Equine EHV-1/4 serology: NEGATIVE (0)A single positive titer indicates exposure or vaccination. A 4-fold rise between paired acute and convalescent samples confirms active infection. Equine herpesvirus 1 (EHV-1) can cause respiratory disease (rhinopneumonitis), abortion in pregnant mares, and neurologic disease (equine herpesvirus myeloencephalopathy — EHM). EHV-4 typically causes milder respiratory disease and is rarely associated with abortion or neurologic signs. EHV-1 is highly contagious and outbreaks are a serious concern in boarding stables, show grounds, and breeding farms.
Your veterinarian will determine if this represents vaccination, past exposure, or active infection. If active EHV-1 is suspected, your horse should be isolated immediately. Report to state authorities as EHM is reportable in some regions. Affected horses require supportive care; antivirals (valacyclovir) may be used in neurologic cases. Good biosecurity (separate equipment, hand washing between horses) is essential to prevent spread.
Equine EHV-1/4 serology: POSITIVE (1)Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.