TABLE 3:

Laboratory results and the performance of the horses

	All sampling occasions		Regular sampling occasions		Additional sampling occasions
Poor performance (SFE and trainers opinion)	No	Yes	No	Yes	No	Yes
Titres above cut-off ERBV	112	21	109	17	3	4
Titres above cut-off ERAV	68	10	66	9	2	1
Titres above cut-off EHV-1, EHV-4	50	14	50	11	0	3
Fourfold rise titre ERBV	7	1	7	1	0	0
Fourfold rise titre ERAV	3	0	3	0	0	0
Fourfold rise titre EHV-1, EHV-4	9	1	9	1	0	0

EHV, equine herpesvirus; ERAV, equine rhinitis A virus; ERBV, equine rhinitis B virus; SFE, standardised field exercise test