. Diseases of the rectum and anus: designed for students and practitioners of medicine. ct that, by this means, it has re-peatedly been possible not only to demonstrate for the firsttime the presence of parasites, but by their expulsion to re-move severe pathologic conditions. The frequency of parasitesis shown by the statistics of Heisig, who was able to demon- 60 DISEASES OF THE RECTUM AND ANUS strate parasite-ova in the stools of 119 individuals out of 230examined (52 per cent.). In many instances their presence is indicated by no ma-croscopically demonstrable alterations of the stools. Tha
. Diseases of the rectum and anus: designed for students and practitioners of medicine. ct that, by this means, it has re-peatedly been possible not only to demonstrate for the firsttime the presence of parasites, but by their expulsion to re-move severe pathologic conditions. The frequency of parasitesis shown by the statistics of Heisig, who was able to demon- 60 DISEASES OF THE RECTUM AND ANUS strate parasite-ova in the stools of 119 individuals out of 230examined (52 per cent.). In many instances their presence is indicated by no ma-croscopically demonstrable alterations of the stools. Thatchronic diarrhea, which may cease after expulsion of tape-worms, is occasionally present, has already been various infusoria have been found in chronic diarrheain such large numbers as to be of significance. While, on theone hand, proof of the etiologic relation of the infusoria tothe origin of the disease could not be established; on the other,there was no doubt that the infusoria were responsible for theperpetuation of the diarrhea. In addition to the megastoma. Fig. 26.—The Exaggerated Knee-Chest, or Martin, Posture. entericum, cercomonas, trichomonas, and peculiar pear-shapedinfusoria have been found in such conditions. Quincke and Roos, who first directed attention to thissubject, also found animal parasites in two cases of the first case, imported from Naples, a form identic withthe ameba Loesch was found which produced fatal dysentery incats; in the second case, originating in Kiel, a much less in-fectious ameba was observed. Of the pathogenic bacteria occurring in the intestinal dis-charges, the bacilli of tuberculosis, typhoid fever, and choleraare deserving of special consideration. It should not be for- EXAMINATION 61 gotten that, under certain circumstances, the gonococcus alsomay be present. It may also be stated that the diarrheal stoolsof infants, especially the mucous admixtures, very frequentlycontain spirilla, the source of w
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