FIG 4.

Sweat and sebum checkerboard assays reveal species-specific growth patterns. Strains were cultured in unique combinations of artificial sweat media (0×, 0.031×, 0.0625×, 0.125×, 0.25×, 0.5×, 1×, and 2×) and artificial sebum media (0, 0.002, 0.004, 0.008, 0.016, 0.031, 0.0625, and 0.125%) for 18 h, after which an endpoint OD₆₀₀ reading was recorded. Data from at least three replicates were collected for each strain, and the OD₆₀₀ values from uninoculated medium were subtracted from the experimental OD₆₀₀ values. Average OD₆₀₀ values for the replicates are shown.