A mother brings her 2-month-old to the well-baby clinic. She states that when she kisses her baby, the infant's skin tastes salty. The nurse should prepare the mother for what standard diagnostic test to screen for cystic fibrosis (CF)?

The nurse should prepare the mother for a sweat-chloride test to screen for cystic fibrosis (CF). A sweat- chloride test measures the amount of chloride in the sweat and is used to diagnose CF. CF is a genetic disorder that can cause the body to produce thick, sticky mucus that can clog the lungs and pancreas. One of the symptoms of CF is salty-tasting skin due to an increased amount of salt in the sweat. The other options (B, C, and D) are not standard diagnostic tests for screening for CF.