TABLE 1.

Distribution of CD11c and MHC class II markers on peritoneal cells obtained from naive mice immunized with live and dead C. trachomatis MoPn EBs^a

Group	Mean % positive ± SEMb
	CD11c+ class II−	CD11c+ class II+	CD11c− class II+
Day 0	0	4.1 ± 1.0	19.8 ± 3.6
Day 3
DEB	0	0.3 ± 0.2	5.3 ± 1.6
LEB	8.2 ± 1.5c	6.9 ± 2.5c	11.8 ± 2.9
Day 7
DEB	0	3.2 ± 0.75	21.2 ± 8.6
LEB	0	13.1 ± 0.45	20.3 ± 5.8
Day 21
DEB	0	0.75	29.7
LEB	0	0.4	43.0

^aFour mice for each group were studied on days 0, 3, and 7 postimmunization. One mouse from each group was studied at day 21. Mice were immunized intraperitoneally with dead (UV-killed) or live MoPn EB (DEB or LEB). The cells were double stained with PE-conjugated anti-CD11c and FITC-conjugated anti-MHC class II and analyzed by flow cytometry. 

^bPercentage of surface marker-positive cells as a proportion of total viable peritoneal cell population. Propidium iodine staining and scatter gating were used to exclude dead cells. 

^cP < 0.05 compared with the group of mice immunized with dead EB.