the immune reactivity of these calves and of nonvaccinated control calves was followed before and after the challenge infection up to 42 days by ( i ) intradermal injection of s. typhimurium crude extract , outer membrane protein preparation ( porins ) , and lipopolysaccharide ( lps ) , ( ii ) in vitro stimulation of peripheral blood lymphocytes estimated by using uptake of [ 3h ] thymidine , with s. typhimurium crude extract , porins , lps , and polysaccharide ( o-antigenic polysaccharide chain free of lipid a ) , and salmonella sp . serotype thompson ( o-antigen 6,7 ) strain is40 lps and polysaccharide , and ( iii ) estimation of the class-specific immunoglobulin g ( igg ) and igm antibody responses against s. typhimurium lps and porins , and salmonella sp . serotype thompson lps .
C0069180
o-antigen
C0023810
lps