title: Susceptibility of major histocompatibility complex (MHC) class I- and MHC class II-deficient mice to Cryptosporidium parvum infection.
abstract: Major histocompatibility complex (MHC) class I-deficient and MHC class II-deficient mice lack functional CD8 T cells and CD4 T cells, respectively. These mice were evaluated for infection following oral administration of 10(7) Cryptosporidium parvum oocysts. MHC class II-deficient (but not MHC class I-deficient) mice dosed with C. parvum oocysts at 3 to 5 days of age remained infected 8 weeks postexposure. MHC class II-deficient mice exposed to C. parvum oocysts at 5 to 6 weeks of age were significantly more susceptible to infection than control mice (P < 0.0001).
authors.affiliation: Department of Veterinary Microbiology and Pathology, Washington State University, Pullman 99164-7040.
authors.forename: S A
authors.initials: SA
authors.lastname: Aguirre
authors.forename: P H
authors.initials: PH
authors.lastname: Mason
authors.forename: L E
authors.initials: LE
authors.lastname: Perryman
mesh_terms: D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D016827:CD8 Antigens; D003457:Cryptosporidiosis / Q000209:etiology* / Q000276:immunology* / Q000469:parasitology; D016785:Cryptosporidium parvum / Q000302:isolation & purification; D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II; D051379:Mice; D008810:Mice, Inbred C57BL; D016176:T-Lymphocyte Subsets / Q000276:immunology
chemical_list: D016827:CD8 Antigens; D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II