PFGE profiles generated with NotI-digested genomic DNAs of V. cholerae O1 El Tor and O139 isolates. (A) Lanes: 1, AHO66 (O1, Ogawa); 2, AHO72 (O1, Ogawa); 3, AHO74 (O1, Ogawa); 4, AHO80 (O1, Ogawa); 5, AHO94 (O1, Ogawa); 6, AHO86 (O1, Ogawa); 7, AHO78 (O139); 8, AHO82 (O139); 9, AHO92 (O139). (B) Lanes: 1, CO366 (O1, Ogawa), pattern H; 2, CO370 (O1, Ogawa), pattern I; 3, CO388 (O1, Ogawa), pattern J; 4, CO392 (O1, Ogawa), pattern K. The various patterns referred to are those reported by Yamasaki et al. (35). Positions of the bacteriophage λ ladder molecular size markers are indicated by bars.