CD14 and bacterial infectious disease: In an attempt to mimic an in vitro setting of bacterial infection, THP1-Blue-CD14 cells treated with nFhGST were stimulated with optimized concentrations of two heat-attenuated clinical bacterial isolates: Klebsiella pneumoniae (1.22 × 108 cells/ml) and Enterococcus faecalis (1.14 × 109 cells/ml), which are representative of Gram-negative and Gram-positive bacterial strains, respectively.