Stenotrophomonas maltophilia: to be or not to be a cystic fibrosis pathogen

Stenotrophomonas maltophilia can cause persistent airway colonization and chronic infection in cystic fibrosis (CF) patients. The clinical effect of chronic S. maltophilia infection is still a matter of debate. The purpose of the review is to summarize studies published during the last 1.5 years with a focus on whether S. maltophilia should be regarded as a 'true' CF pathogen.