Figure 2. Selected pulsed-field gel electrophoresis (PFGE) clusters that represent 102 strains of Salmonella Typhimurium and shared indistinguishable PFGE patterns among humans (H), chicken meat and intestine (C), pork meat and swine intestine (P), and beef meat and cattle intestine (B). Several clusters (C,D, E, and L) were present in more than one state. MI, Michoacan; SLP, San Luis Potosi; SO, Sonora; YU, Yucatan. An expanded version of this figure containing the complete set of PFGE patterns is available from http://www.cdc.gov/EID/content/14/3/429-G2.htm.