Toll-like receptor 2 (TLR2) has been identified as an important receptor involved in the induction of IL-6, IL-8, granulocyte-macrophage colony-stimulating factor (GM-CSF), and TNF-α by epithelial cells or macrophages in response to Chlamydia infection (15, 16). The gene discussed is IL6; the disease is chlamydia infectious disease.