Since Rossel originated the aloin test for the detection of traces of blood in the feces it has been used to a considerable extent in the detection of occult hemorrhage in gastric carcinoma and ulcer. In Naunyn's clinic a routine use of this test has been carried on for some time in connection with the typhoid cases. The result of the test in the first eighteen cases is described by Petracchi.2 Of eighteen cases tested, eight showed traces of blood at some stage of the disease. In the great majority of cases the positive test was observed during the second and third weeks of the disease, during the period when hemorrhages apparent to the naked eye are likely to appear. In four of these cases large hemorrhages occurred, generally three or four days after the occult hemorrhage was detected. Most of the eight cases were severe, though the autopsies
THE SIGNIFICANCE OF TRACES OF BLOOD IN TYPHOID STOOLS. JAMA. 1905;XLIV(15):1203. doi:10.1001/jama.1905.02500420047015
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