Er or others), season specimen collected, and time from specimen collection to being frozen in the laboratory. Analyses were conducted using Stata statistical software v.11.0 (StataCorp, College Station, TX, USA).however 10.9 of swabs were received more than 7-days after their collection.Excluded samples:For EHV1 extraction and inhibition testing, 42 (0.81 ) DNA extracts failed the EHV1 criteria.