Abul-Milh M, Lachowicz T M, Grzybek-Hryncewicz K, Jankowski S
Institute of Microbiology, Wroclaw University, Poland.
Acta Microbiol Pol. 1987;36(3):201-5.
K31 antigen is the important element of outer membrane in resistance of E. coli H209 to the bactericidal activity of normal rabbit serum. The strains more resistant to the effect of serum are those containing simultaneously K31 and other factors, R plasmids (like R100. 1 and pAM588-Ia) or virulence plasmids (Vir). Mutant strains lacking of K31 antigen are strongly killed by the serum but this effect is delayed when these strains had one of the above plasmids.
K31抗原是大肠杆菌H209外膜中使其抵抗正常兔血清杀菌活性的重要成分。对血清作用更具抗性的菌株是那些同时含有K31和其他因子、R质粒（如R100.1和pAM588-Ia）或毒力质粒（Vir）的菌株。缺乏K31抗原的突变菌株会被血清强烈杀灭，但当这些菌株含有上述质粒之一时，这种杀灭作用会延迟。
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