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A graph showing the recognition of bacterial isolate by the immunized serum. Each ELISA plate well was sensitized with 1 × 107S. flexneri cells. Based on optical density (OD) in ELISA, the antibody response was gradually increased against whole bacterial cells in both vaccinated and control mice. Here the antibody response in the serum of vaccinated mice was significantly (P-value 0.0468) higher than the control mice.
