Hello, to diagnose Cystic Fibrosis or Mucoviscidosis, you should search for a pneumonologista and this should ask for the sweat test, to find out the amount of salt that holds in the sweat of the person suspected, after this result he can confirm or dismiss the suspicion based on clinical symptoms. If the examination is unsuccessful and the person has symptoms, the physician should repeat the examination. If you are still unsuccessful, you should ask for genetic testing, for disease to be ruled out or confirmed from time to time