 The two main ways by which azithromycin is thought to help with the chronic lung infections seen in CF are by a reducing inflammation and b direct effects on the bacteria, in particular P. aeruginosa. BCC pulmonary infection in CF is often associated with a large inflammatory response similar to or more severe than P. aeruginosa infection. If azithromycin works mainly by an anti-inflammatory mechanism, it should also be helpful in CF patients infected with BCC. 