Table 4. Organ colonization in pregnant and non pregnant hosts after S. Enteritidis enterocolitis.

Mice	Dose CFU/mice	Peyer's patches(a) CFU/organ	Spleen(a) CFU/organ	Intestine(a) CFU/organ	Uterus(a) CFU/organ	Placenta(a) CFU/organ	Fetus(a) CFU/fetus
Pregnant	103	5,8×105 *	6,4×105 *	4,0×104 ‡	4,9×105	2×105	7,6×102
		(104–8×105)	(104–106)	(103–7×104)	(105–5×106)	(105–5 ×106)	(105–5×106)
Non pregnant	103	6×101	7×101	1.5×102	-	-	-
		(2×101–8×101)	(2×101–9×101)	(2×101–3×102)

Groups of 15 pregnant and non pregnant mice received 20 mg of streptomycin 24 h before intragastric infection with 3–4×10³ CFU of S. Enteritidis (day 15 of gestation in case of pregnant hosts). At day 3 after infection mice were sacrificed and bacterial loads were analyzed as described in materials and methods.

^(a)Median (range).

*p<0.01;

^‡p<0.05 in comparison with the non pregnant infected.