Review Question - QID 212802

A 1-year-old boy presents to the physician with a fever and a persistent cough for the past 5 days. His parents noted that since birth, he has had a history of recurrent skin infections, ear infections, and episodes of pneumonia with organisms including Staphylococcus aureus, Pseudomonas, and Candida. Physical exam is notable for prominent facial scars in the periorbital and nasal regions, which his parents explain are a result of healed abscesses from previous skin infections. A sputum sample is obtained from the patient and the culture grows Aspergillus. Which of the following diagnostic test findings would confirm the patient’s underlying genetic disease?