Background: Salmonella enterica subsp. enterica serovar Muenchen (antigenic formula 6,8:d:1,2) is a serovar of the O:8 (C2-C3) serogroup. In the U.S., Salmonella Muenchen is a common serovar that is reported among the top ten serovars isolated from humans. Strains of S. Muenchen with multidrug resistant phenotypes have been reported; one of these reports described an strain of S. Muenchen resistant to up to 12 antibiotics (i.e., ampicillin, chloramphenicol, streptomycin, sulfamethoxazole, tetracycline, amoxicillin-clavulanic acid, kanamycin, gentamicin, cephalothin, and ceftriaxone). Outbreaks caused by S. Muenchen have been associated with several foods, including orange juice and alfalfa sprouts.
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