TABLE 1.

Virus recovery and PCR analysis for proviral DNA following challenge

Treatment	Animal	Virus recovery at wk postchallengea				No. of animals protected/total
		2	4	8	12b
CAP:I	89D420	0	0	0	0 [+]	1/6
	H608	0	0	0	0 [+]
	359L	+	+	+	ND
	407L	0	0	0	0 [−]
	H671	+	+	+	ND
	89D367	+	+	+	ND
CAP:II	89C001	0	0	0	0 [−]	4/6
	P778	0	0	0	0 [−]
	976W	++	++	++	ND
	P851	++	++	++	ND
	936P	0	0	0	0 [−]
	P407	0	0	0	0 [−]
Control	89D264	++	++	++	++	0/4
	89D205	+	+	+	+
	59R	++	++	++	++
	AH37	++	++	++	++

^a+, Positive results after single treatment and challenge; ++, positive results after double treatment and challenge; ND, not done; 0, negative result. 

^bSymbols in brackets indicate presence (+) or absence (−) of proviral DNA 12 weeks after double treatment and challenge for animals negative for virus isolation.