Screening for Cystic Fibrosis and Cystic Fibrosis Related Disorders in Chinese Adults With Bronchiectasis

In people with cystic fibrosis (CF), there is a problem in the transport of chloride across cell membranes. This results in higher concentrations of chloride (as salt) in sweat compared to those who do not have cystic fibrosis. So, if there is a family history or a possibility of CF, the sweat test is part of the special tests to help make, or exclude, a diagnosis of cystic fibrosis.