CXCL5 and infection: CXCL5, a neutrophil-attracting chemokine, was similarly elevated in active (12.8 ± 0.7 NPX) and dormant infection samples (12.9 ± 1.1 NPX, p = 0.780) when compared to the aseptic joint replacements and the MSIS-cleared samples that clustered with them (10.5 ± 1.6 NPX, p < 0.001 versus dormant, p = 0.002 versus active).