Figure 3. MPO activity in placenta after S. Enteritidis enterocolitis.

Pregnant mice received 20 mg of streptomycin 24 h before intragastric infection with 3–4×10³ CFU of S. Enteritidis (day 15 of gestation). A group of non infected pregnant mice was included as control. Placentas (healthy and infected) were obtained on day 18 of gestation. MPO assay was performed as described in materials and methods. Data are presented as fold increase relative to non infected control, set as 1. Placentas from each individual mouse were pooled. Five animals per group were analyzed. Results are expressed as mean +/− SD. *p<0.01 respect to uninfected control placentas. Representative data from 3 independent experiments.