Figure 9. A subset of biofilm-associated macrophages express arginase-1.

Tissues surrounding biofilm-infected catheters were collected from wild type mice at day 7 following S. aureus infection and subjected to immunofluorescence staining for the macrophage-specific marker Iba-1 (red) and arginase-1 (green) to determine co-localization patterns by confocal microscopy (arrows, 20X magnification). The position of the biofilm-infected catheter is denoted by asterisks. Results are representative of 6 individual animals.