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Characteristics of the 100 E. coli urosepsis isolates and of the three archetypal strainsa
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Physically linked genes on PFGE are represented in the same color (only hly-positive strains were tested). nd, not done; number of (+), number of copies of the gene. a, PCR hra/pheR fragment size, 5.2 kb; b, PCR hra/pheR fragment size, 7.5 kb; c, PCR hra/leuX fragment size, 8 kb; d, PCR hra/leuX fragment size, 4.5 kb.
