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Diversity of environmental V. cholerae isolates from Newport Bay watershed revealed by ERIC-PCR fingerprinting. A total of 37 representative patterns of the 104 unique fingerprints generated from 137 isolates are shown. An O1 classical toxigenic strain (ATCC 11623) and an O1 El Tor nontoxigenic strain were included as references. ctxA- and zot-positive strains were detected by PCR, and the presence of ctxA was further confirmed by internal probe hybridization.
