TABLE 1.

Recovery of infectious chlamydiae from persistently infected HEp-2 cells^a

Days after infection	Mean IFU/105 cells after treatment lasting:
	6 days	8 days	12 days
8	100 ± 78	63	35
10	654 ± 310	0	0
12	2,491 ± 939	19	0
14	2,713 ± 1,819	NDb	0
16	3,268 ± 1,470	9	ND
18	5,225 ± 1,442	185	102
20	890 ± 812	243	107

^aData presented are mean IFU per 10⁵ cells determined in quadruplicate (6-day treatment) or duplicate experiments. 

^bND, not done.