Fig. 1.

Infection of endothelial cells with different Staphylococcus aureus strains. Monolayers of endothelial cells were incubated for 60 min at 37°C with the indicated number of S. aureus strain 42D (•) or strain CAPD (▴). After washing and lysostaphin treatment, the percentage of endothelial cells with internalized bacteria (a) and mean number of intracellular bacteria per infected endothelial cell (b) were determined. Data are expressed as means ± s.d. of three to nine experiments with endothelial cells from different donors.