Vandenbosch J L, Kurlandsky D R, Urdangaray R, Jones G W
Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor 48109.
Infect Immun. 1989 Aug;57(8):2566-8. doi: 10.1128/iai.57.8.2566-2568.1989.
Integration of the Salmonella typhimurium virulence plasmid into the chromosome reduces mouse virulence, serum resistance, and HeLa cell adhesion-invasion while prolonging lag time in minimal medium. The proposed virulence plasmid regulatory element, rsk, partially restores virulence and fully restores the other three phenotypes to wild-type levels. Plasmid curing reduces virulence without affecting the other phenotypes. rsk has no apparent effect on the cured strain.
鼠伤寒沙门氏菌毒力质粒整合到染色体中会降低小鼠毒力、血清抗性以及HeLa细胞黏附-侵袭能力,同时延长在基本培养基中的延迟期。所提出的毒力质粒调控元件rsk可部分恢复毒力,并将其他三种表型完全恢复到野生型水平。质粒消除会降低毒力,但不影响其他表型。rsk对消除质粒的菌株没有明显影响。