title: Suppression of memory by passive immunization late in the primary response.
abstract: The acquisition of a capacity to respond well to sheep erythrocytes in the presence of anti-SRBC antibody was taken as an indication of the presence of immunological memory. By the use of passive immunization, both the primary IgG plaque-forming cell response and the establishment of memory were abolished, despite occurrence of a full peak IgM PFC response. Evidence for regarding the aquisition of memory and the IgM PFC and IgG PFC responses as three separate processes was presented. Antibody on day 3 of the response to 1.5 x 10(8) SRBC abolished formation of memory; this effect was less if passive immunization was further delayed and absent by day 10.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000921:Antibody-Producing Cells; D004912:Erythrocytes / Q000276:immunology*; D005260:Female; D006462:Hemolytic Plaque Technique; D007112:Immunity, Maternally-Acquired; D007114:Immunization; D007074:Immunoglobulin G / Q000096:biosynthesis; D007075:Immunoglobulin M / Q000096:biosynthesis; D007136:Immunoglobulins / Q000096:biosynthesis; D008297:Male; D051379:Mice; D012756:Sheep; D013154:Spleen / Q000166:cytology / Q000276:immunology*
chemical_list: D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007136:Immunoglobulins