Fig. 3.

Iodine-stained inclusions of the C. trachomatis strains nvCT [Sweden2 (a)], Sweden3 [wtCT (b)], E/Bour [prototype reference E strain (c)] and C599 [plasmid-free E strain (d)] in McCoy cells. Bar, 4 μm. Stained inclusions containing glycogen are dark brown, as seen in (a)–(c).