Screening newborn infants for cystic fibrosis.

The Boehringer Mannheim test meconium strip advertised for detection of cystic fibrosis 
was, like many other diagnostic aids, marketed before its reliability was 
proven. The test is positive in many infants who do not 
have cystic fibrosis, and may be negative in those who have 
the disease. It is therefore unacceptable for routine screening of newborn 
infants for cystic fibrosis. 