Dendrogram depicting genetic similarity of Salmonella isolates based on PFGE profiles of chromosomal DNA digested with XbaI. Results of PFGE of AvrII-digested DNA and MAPLT are also indicated. Strains belonging to MAPLT group MI were positive for all loci tested: SB46ST64B+, SB28ST64B+, gtrAp22+, gtrBp22+, c1ST64B+, SB21ST64B+, SB26ST64B+; MII: SB46ST64B+, c1ST64B+, SB21ST64B+; MIII: gtrAp22+, gtrBp22+. SE and ST denote respectively Salmonella Enteritidis and Salmonella Typhimurium.