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Table 2 Invasion of HeLa cells by S. flexneri clinical isolates as determined by plaque formation tests

From: Deletion of pic results in decreased virulence for a clinical isolate of Shigella flexneri2a from China

Gene detected by mPCR Number of strains Plaque formation number (per well)*
ipaH ial set1B
+ + + 9 >200±16
+ + - 1 (SF51) 20±5
+ - + 1 (SF68) 4±2
+ - - 1 (SF36) 2±1
  1. * Values represent the mean ± standard deviation of three wells.