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Complement-mediated bacterial killing triggered by A1124. E. coli ST131 strains (81009 [A] and 3O [B]) were incubated in 50% human serum (depleted with the corresponding strain) in the presence of the indicated doses of MAbs. The recovered CFU was related to the input bacterial number. Graphs show the mean ± standard error of the mean obtained from 3 (A) and 2 (B) independent experiments.
