A 22 year old African-American male presents to the family physician office for bloating, flatulence, abdominal cramps and explosive watery diarrhea following ingestion of dairy products.

. Physical examination reveals abdominal distension and borborygmi. You decide to investigate the patient further. Which of the following test result is most likely to be observed?





A Positive Clinitest of stool for oxidizing substances

B Decreased stool osmotic gap

C Positive hydrogen breath test

D Alkaline stool pH

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