CF is an autosomal recessive disease caused by mutations in the CFTRgene identified in 1989 by a research team headed by Lap-Chee Tsui[15, 16].The CFTR gene is localized on chromosome7 and consists of 27 exons and codes for a protein composed of 1,480 amino acidresidues. This evidence concerns the gene CFTR and cystic fibrosis.