Fig. 5.

Purified Ab against S. aureus enhances uptake of bacteria. a, b αS. aureus or αS. aureus IgG purified from rabbit serum (25 µg/ml final concentration) was added to phagocytosis (a, b) or bactericidal activity (c) assays containing PMNs in suspension. The assays contained unopsonized S. aureus (Unop.) or serum opsonized bacteria (Ops.) as indicated. Assays were performed using a CFU:PMN ratio of 1:1. Data represent the mean of 5 independent experiments ± SEM. * p < 0.05. NS = Nonsignificant.