Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
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Diagnosis of traveler's diarrhea begins with a medical history and
physical exam. The bacteria can be cultured from an infected person's stool. A
special test can be done to detect E.coli O157:H7.