Figure 3From: Improving resolution of public health surveillance for human Salmonella entericaserovar Typhimurium infection: 3 years of prospective multiple-locus variable-number tandem-repeat analysis (MLVA) Box plots of the mean MLVA cluster sizes and time between an initial cluster and its re-occurrence. Mean value is shown as horizontal line across the bar. Ends of a bar designate confidence intervals and dotted lines indicate the spread of values in the subgroup.Back to article page