D-xylose breath test

D-xylose breath test
(for bacterial overgrowth in the intestine) a breath test in which the fasting patient is administered D-xylose labeled with carbon 14 and the amount of radiolabeled carbon dioxide in the breath is measured at regular time intervals. Excessive levels of carbon dioxide mean that there are high levels of anaerobic bacteria in the intestines breaking down the xylose.

Medical dictionary. 2011.

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