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Changes in TER after addition of V. cholerae El Tor bacteria are due to RTX toxin, not HA/protease. (A) V. cholerae Bah1 (HA/protease+ [HA/P+]) is compared to Bah1P (HA/P−). (B) Bah1P (RTX+) is compared to Bah2P (RTX−). Values were derived by dividing the recorded resistance (R) value by the mean of three initial resistance values recorded before addition of bacteria and are means and standard deviations of triplicates in a single experiment.
