FIG. 5.

Effect of the presence of soil on the survival of C. jejuni strain RM1221 on spinach leaves during incubation of the plants at 10°C. C. jejuni was inoculated onto clean leaves (○) or leaves that were contaminated with soil in the laboratory (□). Each data point represents the mean of the log-transformed bacterial population size on 10 leaves. The error bars represent ±1 standard error of the mean.