Infection led to robust induction of chemokine and interleukin genes, including Il1b, Il6, Ccl2, Ccl3, Ccl4, Ccl7, Cxcl1, Cxcl2, Cxcl5, Cxcl9, and Cxcl10, and related receptor genes, including Ccr1, Ccr4, Ccr5, Ccr5, Ccr7, Cxcr2, Cxcr5, Il1r2, and Il1rn (Fig. 1c). Here, CCR4 is linked to infection.