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. 2004 Dec;72(12):7212–7219. doi: 10.1128/IAI.72.12.7212-7219.2004

FIG. 4.

FIG. 4.

RAW264.7 mouse macrophage cell-associated E. coli HB101 carrying the pH 6 Ag operon clone (pDG5) or the control vector (pIC20R) (percent) (A) and phagocytosis (percent) of E. coli HB101 carrying the pH 6 Ag operon clone (pDG5) or the control vector (pIC20R) by the macrophages (B). The infection assay was conducted as described in Materials and Methods. Macrophage cell-associated bacteria (percent) and phagocytosis (percent) were calculated as for Fig. 1. Shown are results for E. coli HB101 carrying pDG5 and E. coli HB101 carrying vector pIC20R. Bars represent means plus standard deviations for three experiments, each with duplicate samples. The ability to express pH 6 Ag had a significant effect on the phagocytosis of E. coli (P < 0.05).