We analyzed hLO culture supernatants for the presence of ten cytokines and chemokines commonly produced by epithelial cells in response to infection (TNF-α, IFN-α2a, IFN-β, IFN-λ1, IL-8, IL-1α, IL-1β, IL-6, IP-10, MCP-1). This evidence concerns the gene CCL2 and infection.