TABLE 1.

Levels of C. suis S-45 infectivity for luminal and glandular epithelial cells isolated at the different stages of the estrous cycle

Epithelial cells	Sample	Mean % showing infection ± SD on:
		Day 0	Days 3-5	Days 12-15	Days 16-21d
Luminal	Cervix	2.1 ± 4.04c	10.4 ± 14.99c	1.0 ± 4.04	7.8 ± 4.52c
	Uterus	7.5 ± 9.80a,c	5.2 ± 2.19a,c	0.1 ± 0.32a	3.2 ± 2.73c
	Horn of uterus	8.9 ± 10.0a,c	6.9 ± 4.73a,b,c	0.1 ± 0.41a	4.2 ± 1.21a,c
Glandular	Cervix	3.1 ± 4.68c	2.3 ± 4.09c	0.1 ± 0.40	NT
	Uterus	3.6 ± 5.20c	4.8 ± 5.62a,c	0.1 ± 0.18	NT
	Horn of uterus	3.5 ± 4.92c	5.6 ± 5.26a,c	0.1 ± 0.21	NT

^aSignificantly different (P ≤ 0.05) from the value for epithelial cells isolated from cervix.

^bSignificantly different (P ≤ 0.05) from the value for epithelial cells isolated from uterus.

^cSignificantly different (P ≤ 0.05) from the value for the progesterone-dominant stage of the cycle (days 12 to 15).

^dNT, not tested.