The patient's symptoms are pain upon urination and blood in the urine but no bacteria are cultured from the urine. The doctor suspects schistosomiasis. What question did the doctor asked that gave her a clue about the disease?
A. Have you been eating at places that might not be hygienic?
B. Have you had a blood transfusion?
C. Have you traveled out of the U.S.?
D. Have you been having unprotected sex?
Answer: C
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