Table 1.

Incidence and growth of tumors induced by subgroup A and B ASVs

Chicken line	ASV subgroup	Tumor incidencea	Mean tumor wt (g) on p.i. days:
			21–28	29–34	35–42
CC.R1	A	0/5	0	0	0
P	A	6/8b	—c	—	31.8 (n = 4)
P	B	8/8d	56.25 (n = 6)	—	152.4 (n = 1)

^aData represent number of chicks with tumors/total number of chicks tested.

^bTwo tumors regressed in this group.

^c—, the weight of tumors was not measured at that time interval.

^dOne chick with a tumor died prematurely of nonspecific causes.