Cystic fibrosis (also known as CF or mucoviscidosis) is a common recessive genetic disease which affects the entire body, causing progressive disability and often early death.
Difficulty breathing is the most serious symptom and results from frequent lung infections that are treated with, though not cured by, antibiotics and other medications. A multitude of other symptoms, including sinus infections, poor growth, diarrhea, and infertility result from the effects of CF on other parts of the body.

Smooth muscle cells isolated from the major bronchia.