title: [Immunological investigation on refratory nature of Salmonella infections].
mesh_terms: D002432:Cecum / Q000276:immunology; D006801:Humans; D007075:Immunoglobulin M / Q000032:analysis; D008297:Male; D008875:Middle Aged; D012480:Salmonella Infections / Q000276:immunology*; D012477:Salmonella enteritidis / Q000276:immunology*
chemical_list: D007075:Immunoglobulin M