Figure 5

Lethal photosensitization of Staph. aureus in 50% horse serum (HS) using 25 □ or 200 ■ μg ml^-1 ICG. An equal volume of either 50 or 400 μg ml^-1 ICG (L-S+ and L+S+) or PBS (L-S- and L+S-) was added to Staph. aureus suspensions in HS and samples were left for 10 minutes in the dark and then irradiated at a fluence rate of 1.37 W cm^-2 and a light dose of 411 J cm^-2 using a NIR 808 nm laser (L+S- and L+S+) or kept in the dark (L-S+ and L-S-).