A 34-year-old white woman is treated for a UTI with amoxicillin. Initially she improves, but 5 days after beginning treatment, she develops recurrent fever, abdominal bloating, and diarrhea with six to eight loose stools per day. You suspect antibiotic-associated colitis. The best diagnostic test is:
A. Identification of Clostridium difficile toxin in the stool
B. Isolation of C. difficile in a stool culture
C. Stool positive for white blood cells
D. Detection of IgG antibodies against C. difficile in the serum
E. None of the above
A. Identification of Clostridium difficile toxin in the stool
B. Isolation of C. difficile in a stool culture
C. Stool positive for white blood cells
D. Detection of IgG antibodies against C. difficile in the serum
E. None of the above
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