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Relationship between the concentrations of E. coli O157: H7 (A) and Vibrio cholerae O1 (B) detected by the as-proposed biosensor and plate count method. Insert: The concentration range for the concentration of E. coli O157:H7 (a) and Vibrio cholerae O1 (b) respectively by box chart (box, 25%-75% value range; line, 10%-90% value range; ☆, mean value; ▲, max value; ▼, min value).
