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Amplification of ctx gene in V. cholerae isolates (L-Ladder, PC-Positive control, NC-Negative control, clinical V. cholerae isolate; 210, 130, 262, 457 202, 274, 219, 306, 126, 256, 201, 248, 232, 297, 349, 222, 303, 335, 283, 117, 253 showing positive ctx band).
