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Glucose-6-Phosphate Dehydrogenase (G6PD) deficiency is the most common human enzyme deficiency; an estimated 400 million people worldwide are affected by this enzymopathy (6). With regards to the demographics of G6PD deficiency, most of the affected individuals reside in Africa, the Middle East, and Southeast Asia. The G6PD enzyme catalyzes an oxidation/reduction reaction.

Cystic Fibrosis (CF) is an autosomal recessive disorder affecting the lungs, pancreas, intestine and liver. CF is the most common in Caucasians with an incidence rate 1:2500 newborns. CF is caused by mutation in the gene for the protein cystic fibrosis transmembrane conductance regulator (CTFR) [1,2]. Large-scale neonatal screening for CF is performed by indentification of increased levels of immunoreactive trypsinogen (IRT) in blood.