Infection of epithelial cells, which are the primary targets of Chlamydia, results in production of cytokines and chemokines such as IL-8, IL-6, and GM-CSF that recruit inflammatory leukocytes to the site of infection (Rasmussen et al., 1997; Dessus-Babus et al., 2002). This evidence concerns the gene CXCL8 and infection.