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2002:
Turnock L L; Somers E B; Faith N G; Czuprynski C J; Lee Wong A C
The effects of prior growth as a biofilm on the virulence of Salmonella typhimurium for mice.
Comparative immunology, microbiology and infectious diseases 2002;
25(
1):.
Relatively little is known about how growth as a biofilm affects the virulence of pathogenic bacteria. In this study, the virulence of Salmonella typhimurium grown as a biofilm, or as planktonic cells, was compared in mice. Increased numbers of colony forming units were recovered from the spleens of mice 5 days after i.p. injection with S. typhimurium grown as a biofilm, as compared with planktonic cells (P < 0.05). No significant difference in the CFU of S. typhimurium recovered from the liver was noted at the same time point, and no difference was noted in the CFU recovered from the spleen or liver at 5 days after i.v. or i.g. inoculation with 10(5) S. typhimurium. Nor were any differences noted at 7 days after i.p., i.v. or i.g. inoculation. Thus, any effect of growth as a biofilm has on the virulence of S. typhimurium seems to be limited to the first 5 days after i.p. inoculation.
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