title: Susceptibility of mice to vaginal infection with Chlamydia trachomatis mouse pneumonitis is dependent on the age of the animal.
abstract: Mice from three strains, BALB/c (H-2(d)), C3H (H-2(k)), and C57BL/6 (H-2(b)), ranging from 5 to 14 weeks of age, were inoculated intravaginally with different doses of the Chlamydia trachomatis mouse pneumonitis serovar. Vaginal swabs taken at weekly intervals showed that the percentage of animals with positive cultures and the number of inclusion-forming units recovered per mouse were higher in the younger animals. Furthermore, vaginal shedding lasted longer in the young mice than in the older mice. In addition, following mating higher rates of infertility and a decrease in the number of embryos were observed in the infected young mice. In conclusion, susceptibility to a chlamydial vaginal infection is dependent on the age of the mice, with the older animals being more resistant.
authors.affiliation: Department of Pathology, Medical Sciences, University of California, Irvine, Irvine, California 92697-4800, USA.
authors.forename: S
authors.initials: S
authors.lastname: Pal
authors.forename: E M
authors.initials: EM
authors.lastname: Peterson
authors.forename: L M
authors.initials: LM
authors.lastname: de la Maza
mesh_terms: D000375:Aging / Q000276:immunology*; D000818:Animals; D002690:Chlamydia Infections / Q000235:genetics / Q000276:immunology* / Q000382:microbiology; D002692:Chlamydia trachomatis / Q000276:immunology*; D004195:Disease Models, Animal; D004198:Disease Susceptibility / Q000276:immunology; D005260:Female; D005298:Fertility; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D011014:Pneumonia