Newborn screening for CF is done in the first two or three days after birth. Testing identifies babies who are at high risk of having CF. If a baby has a positive screen for CF, a painless sweat test may be used to rule out or confirm a cf diagnosis. Today, all 50 states and the District of Columbia screen newborns for cystic fibrosis.


Adults may also seek genetic testing for CF to help identify carriers who could pass the disease onto their children. Genetic testing is also available to confirm a CF diagnosis in adults.