Opsonophagocytic assay used to test the ability to mediate opsonic killing in the strain <i>E</i>. <i>faecium</i> E155 by antibodies raised against the recombinant proteins at different dilutions.

<p>αAdcA_fm (square grid) and αPsaA_fm (vertical stripes), compare with the activity of pre-immune rabbit serum (white bar). The different sera and the corresponding dilutions used in the OPA are indicated in the abscissa and the % killing in the ordinate. Bars represent the mean of data and the error bars represent the standard error of the mean.