XCL2 and infection: For the gene expression analyses (Fig. 4B), the levels of interleukin (IL)-6 and C-X-C Motif Chemokine Ligand 2 (CXCL2) were significantly upregulated in the infection group (P < 0.001 and P < 0.01, respectively; n = 5; Tukey test) compared to the control.