It should be noted that in vivo scenario is quite complex and the final outcome of the infection is dependent on the concerted action of several cell types such as epithelial cells, alveolar macrophages, neutrophils and lymphocytes, all of them expressing TLR2, recruited and/or activated upon infection whereas here we have just tested the interplay between A. baumannii and airway epithelial cells. The gene discussed is TLR2; the disease is infection.