Cystic fibrosis dating each other
The mucus is thicker than normal because CF affects cells in the epithelium (pronounced: eh-puh-THEE-lee-um), the layer of cells that lines the passages in the body's organs.
In a person who does not have CF, the epithelial cells produce a thin, watery mucus that acts like a lubricant and helps protect the body's tissues.
Doctors are wary of raising expectations among families affected by cystic fibrosis - which affects 10,000 patients in Britain - after repeated claims since the gene was discovered in 1989 that a gene-therapy cure was just around the corner.
The faulty gene affects the movement of salt and water in and out of cells.
This, along with recurrent infections, can result in a build-up of thick, sticky mucus in the body's tubes and passageways – particularly the lungs and digestive system.
It is important that you let us know if we have fallen short of your expectations.
Cystic fibrosis is caused by a faulty gene that a child inherits from both their parents.The condition is present from birth and cannot be caught from someone else who has it. You inherit one set from your mother and one set from your father.