Fig. 3From: Genetic diversity of Listeria monocytogenes strains in ruminant abortion and rhombencephalitis cases in comparison with the natural environmentMinimum spanning tree of Listeria monocytogenes sequence types (STs) in the clinical and the natural environment dataset. A total of 253 environmental and 350 animal clinical isolates were included into the analysis. Each ST is indicated by a circle whose size reflects the number of isolates, and the STs differing by only one allele are shaded in gray. The numbers on the connecting lines indicate the number of allelic differences in the MLST schemeBack to article page