PHILADELPHIA (CBS) - Cystic fibrosis occurs in one out of every three thousand births in the United States. We know from studies and observation that it is most common in Caucasians and people of northern European ancestry.

The condition is lifelong and can lead to severe damage to the lungs. Although there have been tremendous advances in treatments in the past thirty years it can be a devastating problem.

According to a new report in the journal Nature, researchers say they have found two genes that are associated with a severe form of cystic fibrosis. The researchers looked at almost 3500 patients to gain this knowledge. The researchers hope that knowledge gained could help with treatments and preventive screening down the road.

Reported By Dr. Brian McDonough, KYW Newsradio Medical Editor