<qa>  What is the main way azithromycin is thought to help with chronic lung infections?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. 