Cystic fibrosis Quiz: Ace Your Exams

Get ready to dominate your medical and nursing exams by using our dynamic quizzes to elevate your knowledge and increase your confidence. Whether you're gearing up for the USMLE®, COMLEX®, or your next in-class assessment, Osmosis quizzes tackle key topics in pathology, diagnostics, and treatment approaches. By honing in on clinical readiness and decision-making, we make sure the knowledge you gain empowers you both in the classroom and in real-world practice. Jump in and supercharge your exam prep!

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An infant boy is born at 40 weeks gestation to a 26-year-old woman. The delivery was uncomplicated, and Apgar scores were 9 and 9 at 1 and 5 minutes, respectively. The patient was conceived via in vitro fertilization; the prenatal course was uncomplicated. The newborn’s father underwent microsurgical epididymal sperm aspiration due to a lack of sperm in his ejaculate. The father has a history of recurrent infections and chronic diarrhea. The patient’s vitals are within normal limits. Physical examination of the neonate is normal. A heel-prick test detects elevated serum levels of immunoreactive trypsinogen. Which of the following tests would most likely confirm the diagnosis in this patient?  

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