TABLE 4.

Comparison of sensitivities of VI in eggs and rRT-PCR assays for detection of EIV using archived clinical specimens

Clinical specimen tested	No. of specimens tested by:
	VI		rRT-PCR assay
			EqFlu NP		EqFlu M		EqFlu HA3
	Positive	Negative	Positive	Negative	Positive	Negative	Positive	Negative
211 Nasal swabs from a horse challenge study	98	113	164	47	166	45	153	58
149 Field nasal swabs	7	142	41	108	25	124	27	122