Which of the following can be used in the diagnosis of cystic fibrosis?
1) An elevated potassium level in the sweat
2) An elevated chloride level in the sweat
3) Genetic testing of the parents
4) An elevated blood level of immunoreactive trypsin

Question

Quizplus · Accepted Answer

2, 3, 4 are correct. An elevated chloride level in the sweat is a classic diagnostic marker for cystic fibrosis. Genetic testing can identify mutations in the CFTR gene responsible for the condition. Elevated levels of immunoreactive trypsin in the blood can indicate cystic fibrosis in newborn screening tests. Elevated potassium levels in sweat are not a diagnostic criterion for cystic fibrosis.

Which of the Following Can Be Used in the Diagnosis