FIG. 2.

Influence of iron on growth of E. coli JPN10 in SAPI, SAPI+serum (SS), and SAPI+serum with 50 μM NE (SSN). Bacteria were incubated for 24 h at 37°C in a humid atmosphere containing 5% CO₂, after which each sample was enumerated for viable counts. The Fe³⁺ concentrations in the key are given in micromolar amounts. Each bar represents the mean ± the SD of triplicate readings. LOD, limit of detection.