Objective To prepare Pseudomonas aeruginosa-IATS(International Antigen Typing System)3 O-specific polysaccharide-tetanus toxoid conjugate vaccine and analyze its immune characteristics.Methods Lipopolysaccharide(LPS)was isolated from P.aeruginosa IATS 3 by hot phenol method,in which the lipid A was removed.The obtained O-specific polysaccharide(O-SP)was purified and ac-tivated with CDAP,then conjugated to tetanus toxoid(TT)in mediation of EDAC using adipic acid dihydrazide(ADH)as a linker.The prepared conju...