Check out today’s Step 1 Qmax Question Challenge.
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A 32-year-old woman complains of a 1-month history of weight loss, fever, cough, and difficulty breathing. Physical examination reveals cervical lymphadenopathy and bilateral decreased breath sounds, as well as white patches on her tongue and buccal mucosa. The patient’s chest X-ray is shown here. The physician prescribes trimethoprim-sulfamethoxazole.
Which of the following laboratory techniques should be utilized to confirm the cause of the patient’s susceptibility to the current infection?
B. Northern blot
C. Polymerase chain reaction
D. Restriction fragment length polymorphism
E. Southern blot
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