FIG. 2.

Dendrogram and AFLP banding patterns of 131 pork and human samples of Y. enterocolitica biotype 1A. The arrows indicate isolates from human sources. The stars indicate reference strains. The black lines indicate a similarity level of ≥92%. There are four major clusters, clusters G, H, I, and K. Six clusters of Y. enterocolitica biotype 1A strains from human and porcine sources exhibiting levels of similarity of ≥90% are highlighted by gray boxes in the banding pattern. The cluster containing biotype 1A, serotype O:5 strains is highlighted with a rectangle. The other serotypes are not indicated since the serotypes of several biotype 1A isolates could not be determined.