FIGURE 4.

Burn serum promotes bacterial aggregation. S. aureus strains were cultured in broth containing 50% burn serum, 50% sham serum, or TSB medium alone, with or without overnight treatment with antioxidant. (A) Bacteria were stained with crystal violet and observed by light microscopy (×1000). Images shown are representative of at least three distinct regions. (B) The percentage aggregation values were calculated. ^∗∗∗P < 0.001, indicates differences are significant between burn serum-treated strains and those treated otherwise. The data were from three independent experiments.