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In making chemical analyses of the gastric juice siphoned off one hour after a test meal, I have frequently observed that the specimen before and after filtration would have a decided greenish tint, suggesting either bile or gastrosia fungosa (mold in the stomach) and on testing some of this filtered gastric juice for bile by the nitrous acid method, I have often been surprised that no reaction would be given.
On April 17, 1909, after siphoning off the gastric contents from a patient I observed that the specimen had a grass-greenish tint. I allowed the gastric contents to pass through some ordinary white filter-paper, and on testing this filtered gastric juice for bile by the nitrous acid test I obtained no reaction. The filter-paper, especially the upper edge, was stained quite green in color, and I could not persuade myself that bile was not present, or else that the case
WOLDERT A. A DELICATE TEST FOR BILE IN THE GASTRIC CONTENTS. JAMA. 1909;LII(22):1758–1759. doi:10.1001/jama.1909.25420480028003a
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