title: Impairment of cell-mediated immunity in Pseudomonas aeruginosa pyelonephritis: lack of suppressor cell activity in vivo.
abstract: Bacterial pyelonephritis was induced in mice by direct microinoculation of Pseudomonas aeruginosa in the kidney. In the acute phase of P. aeruginosa pyelonephritis, a state of cell-mediated immunity impairment, evaluated both in vitro as lymphocyte reactivity to concanavalin A and in vivo as host versus graft reaction has been observed. Furthermore, delayed-type hypersensitivity to specific bacterial antigen has been detected only when the kidney infection was subsiding, i.e., 3 weeks after bacteria inoculation. When investigating the mechanism of such T-cell impairment, we were unable to transfer the immunodepression, suggesting that suppressor cells are not involved in vivo. The role of P. aeruginosa inhibition of cell-mediated immunity in the pyelonephritic host is discussed.
mesh_terms: D000818:Animals; D006789:Host vs Graft Reaction; D006968:Hypersensitivity, Delayed; D051379:Mice; D008808:Mice, Inbred CBA; D011552:Pseudomonas Infections / Q000276:immunology*; D011704:Pyelonephritis / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*; D013997:Time Factors