Further Experiments on Variability in the Gas-forming power of Intestinal Bacteria

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Abstract
Ina recent communication (Penfold 1911) I described experiments with three organisms,B. coliEscherich,B. enteritidisGaertner andB. Grünthal, showing that limitation or complete abolition of certain gas-forming powers normally possessed by these organisms, could be brought about by their growth on chloracetic acid-agar, and further, that in the case of the latter organism, resistance to this medium was associated with such limitation or abolition.