TABLE 2.

Comparison of the time taken for membrane ruffle initiation after bacterial adherence by three S. enterica serovar Typhimurium strainsa

S. Typhimurium strainnbRuffle induction time after adherence (s)c
MedianRange
SL13441116020-630
SL1344LS1197020-490
SL1344LS(pBRluxS)1276020-460
  • a S. enterica serovar Typhimurium strains SL1344 (wild type), SL1344LS, and SL1344LS(pBRluxS) were grown for 3.5 h in LB.

  • b The number of productive bacterium-cell interactions analyzed (n) is shown.

  • c The time interval between bacterial binding to MDCK cells and induction of membrane ruffling was obtained from phase-contrast video microscopy. Data are expressed as median values, and the range in time intervals (minimum to maximum) was measured.