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Genetic relatedness of the 114 optrA-positive E. faecalis examined, based on the PFGE banding patterns of the isolates. Strain codes and PFGE subtypes are depicted. A total of 19 pulsotypes were identified at 90% similarity, designated as I through XIX. (C: chickens, D: dogs, F: flies, H: humans, P: pigs, W: wastewater).
