Abstract
A case of infection by Endamoeba dysenteriæ and Councilmania lafleuri, amœbae of the human digestive tract, was treated in May, 1921, for the former, by the emetin-bismuth-iodide method. The results were negative for it on eight stool examinations six to seven months later. Duodenal drainage from this case, examined after treatment, contained a considerable number of cysts of C. lafleuri of the characteristic size, shape, number of nuclei, and nuclear structure. There were also some empty cysts, bile-stained, of similar appearance in the fresh drainage.
Duodenal drainage was also examined from a second case of infection by Councilmania lafleuri but no E. dysenteriæ. In this case 67 stool examinations have been made since November 23, 1922, with 41 positives. In the heavy bile of the first bottle of duodenal drainages a number of typical cysts of C. lafleuri have been found on two tests of four made. Upon staining by iron hæmatoxylin these cysts had both the cytoplasmic and nuclear structure of the cysts of this parasitic amœba discharged in the stool.
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