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Outbreak PFGE patterns. Fingerprints for the five outbreak serotypes shown were obtained and compared as described in Materials and Methods. The size standard shown above the test fingerprints is Salmonella Braenderup strain H9812 digested with XbaI. Pattern names were assigned by the PulseNet team of the CDC. The number tested refers to isolates collected from patients in July 2004. a, six isolates from tomatoes and four from patients.
