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Cell viability of Caco-2 cells treated with (A) anti-TcdA scFv antibodies (1 µg/mL) and native TcdA (25 µg/mL) of C. difficile RT084; and (B) anti-TcdB scFv antibodies (1 µg/mL) and native TcdB (10 µg/mL) of C. difficile RT017 for 24 h at 37°C. Data shown are means ± SD of three independent experiments. A P value of <0.05 was considered as significant (*P < 0.05; **P < 0.01, ***P < 0.001, ****P < 0.0001) by unpaired Student’s t test and one-way ANOVA statistical analysis.
