CXCL8 and infection: In WCH-SK2SCV infected cells, CXCL8 (fold change 35.34 vs. 3.55 for extracellular and intracellular infection respectively, p = 0.04), and IL6 (fold change 14.12 vs. 5.05 for extracellular and intracellular infection respectively, p = 0.04) expression was significantly higher in extracellular than intracellular infected cells (Figure 6).