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41887 Surgery

A 22-year-old man comes to the emergency depament because of dyspnea, palpitations, and a headache. These symptoms came on soon after he took trimethoprim-sulfamethoxazole for a urinary tract infection. Laboratory studies show a normochromic, normocytic anemia. A peripheral blood smear reveals Heinz bodies. Which of the following is the most likely cause of this patient’s anemia?

ALead poisoning
BFolate deficiency
CGlucose-6-phosphate dehydrogenase deficiency
DHereditary spherocytosis
Surgery
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