FIG. 3.

The lrp(Con) mutation induces elongation of Salmonella cells. (A) Determination of CFU per 1 ml of bacterial cells at an OD₆₀₀ of 1. Data are means ± standard errors for three separate experiments. *, Values differ significantly from the wild-type strain χ3761 (P < 0.05). N.S., not significant. (B, C, and D) Microscopic comparison of the Salmonella strains grown in LB medium as described in Materials and Methods. The cells were observed and photographed under the oil immersion objective (100× magnification). Data are from one of three independent experiments.