title: Acquired immunity to Chlamydia pneumoniae is dependent on gamma interferon in two mouse strains that initially differ in this respect after primary challenge.
abstract: The role of gamma interferon (IFN-gamma) in a Chlamydia pneumoniae mouse model was studied by in vivo neutralization in two inbred mouse strains. During primary C. pneumoniae infection, neutralization of IFN-gamma increased both the numbers of bacteria and the pneumonia score in the lungs of C57BL/6 mice but not BALB/c mice. During reinfection, the bacterial counts in the lungs were increased by IFN-gamma neutralization in both mouse strains. Thus, the effect of IFN-gamma neutralization was dependent on the genetic background in primary infection. However, IFN-gamma appeared to be equally important in both mouse strains during reinfection.
authors.affiliation: Department of Vaccines, National Public Health Institute, Helsinki, Finland.
authors.forename: J M
authors.initials: JM
authors.lastname: Vuola
authors.forename: V
authors.initials: V
authors.lastname: Puurula
authors.forename: M
authors.initials: M
authors.lastname: Anttila
authors.forename: P H
authors.initials: PH
authors.lastname: Mäkelä
authors.forename: N
authors.initials: N
authors.lastname: Rautonen
mesh_terms: D000818:Animals; D002690:Chlamydia Infections / Q000276:immunology*; D016993:Chlamydophila pneumoniae / Q000276:immunology*; D005260:Female; D007371:Interferon-gamma / Q000502:physiology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D018410:Pneumonia, Bacterial / Q000276:immunology; D051381:Rats; D013045:Species Specificity
chemical_list: D007371:Interferon-gamma