Laboratory phenotypes included biofilm formation27, methicillin resistance28, cell toxicity29,30 and post-infection interleukin-8 (IL-8) levels in skin epithelial cells and blood serum31,32 (See Supplementary Methods, Fig. 3a–e, Supplementary Figure 4, Supplementary Data 6). The gene discussed is CXCL8; the disease is infection.