TABLE 2.

IFN-inducing capacities of VSV field isolates and plaque-derived populations^a

Virus type or designation	No. of samples	IFN yield (U/107 cells) (mean ± SD)	Range	Fold difference
VSV-IN isolates (first-passage populations)	32	451 ± 694	50–2810	56
VSV-NJ isolates (first-passage populations)	34	4,429 ± 7,688	350–45,000	129
VSV-IN no. 11 (plaque-derived subpopulations)	27	4,680 ± 3,560	160–14,310	89
VSV-NJ Lab no. 71 (vesicle plaque-derived subpopulations)	77	858 ± 404	310–2,790	9
VSV-IN Lab no. 22 (plaque-derived subpopulations)
With no. 22-20	36	940 ± 5,165	15–31,000	2,100
Without no. 22-20	35	79 ± 33	15–168	11

^aResults for IN isolates, NJ isolates, and subpopulations of no. 11, 71, and 22 are based on data used to generate Fig. 1a, 1b, 2, 4, and 3, respectively.