Les méthodes de diagnostic, chimiques, bactériologiques et microscopique, un texte-livre pour les étudiants et les praticiens . IV, 433. Les fèces. J29 les bactéries non seulement aider à la digestion, mais également empêcher une certaine quantité d'abnormaldecomposition, du fait qu'elles ralentissent le développement de l'foreigntypes dans une large mesure, en particulier dans des conditions normales. Ce normalbacteria peut cependant, sous certaines conditions, devenir pathogène, mais onlywhen la paroi intestinale perd sa continuité. Dans le cas des bactéries normales de l'intestin deviennent trop nombreux, les produits formés par leur activité uponprotein m

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Diagnostic methods, chemical, bacteriological and microscopical, a text-book for students and practitioners . IV, 433. THE FECES. I29 bacteria not only aid digestion, but also prevent a certain amount of abnormaldecomposition, owing to the fact that they inhibit the development of foreigntypes to a large extent, especially under normal conditions. These normalbacteria may under certain conditions, however, become pathogenic, but onlywhen the intestinal wall loses its continuity. In case the normal bacteria ofthe intestine become too numerous, the products formed by their activity uponprotein material may be absorbed and bring about certain toxic e£fects.i It isinteresting in this connection to find that the bacteria are diminished in amountin chronic constipation, according to Strasburger. The toxic symptoms must, therefore, be referable to the absorption of other than bacterial products ofdecomposition, or the products have increased toxicity. For the best conditionsto exist the symbiotic relations of the intestinal bacteria should be such thatthere are neither too few nor too many bacteria.. Fig. 22.—Cholera spirilla. (Pitfield.) The normal adult stool shows a preponderance of Gram-negative organisms(colon bacilli). Pathologically an increase in this type may be noted (choleraspirilla) or Gram-positive organisms may prevail. This Gram-staining varia-tion in the bacteria of the feces is, also, largely influenced by changes in diet, bacteria of the Bacillus acidophilus and bifudus types becoming quite prominentunder a substitution of a low protein for a high protein diet. 2 (c). The Cholera Spirillum. This organism, known as the comma bacillus, is about 2 microns longand 1/2 micron thick. It is very actively motile and has a single delicateflagellum at one end. It stains easily with the ordinary bacterial stains and isdecolorized by Grams method. The cultural peculiarities of this spirillumwill be discussed in the last section of this book. This organism is usually

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