All 50 states and the District of Columbia screen newborns for cystic fibrosis withing three days after birth. Testing identifies babies who are at high risk of having CF. If a baby has a positive screening for CF, a painless sweat test usually follows to rule out or confirm a cf diagnosis. 


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.