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Complementation of arcA, rcsB, and arcA deletions in mouse colonization competition assays. The complemented genes were inserted at the phage HK022 attachment site, as described in Materials and Methods. Each symbol represents an individual mouse, and the bars indicate the geometric means. The competitive indices were determined from the numbers of CFU in feces at 21 days (cpxR and arcA) or 14 days (rcsB) postinoculation.
