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Detection of V. cholerae O1 by DFA in Black Sea and lake samples. Detection of V. cholerae O1 in water samples from (A–C) Green Cape sample sites on the Black Sea, and (D–F) Kumisi Lake. Concentrated water samples are shown in (A,D), plankton samples in (B,E) and enriched water samples in (C,F). Organisms were detected and visualized using a direct fluorescent-monoclonal antibody (DFA) kit.
