Parasitological investigations upon vegetable organisms found in measles, typhus exanthematicus, typhus abdominalis, small-pox, kine-pock, sheep-pock, cholera, etc / by Ernst Hallier.

  • Ernst Hallier
Date:
1892
Catalogue details

Licence: Public Domain Mark

Credit: Parasitological investigations upon vegetable organisms found in measles, typhus exanthematicus, typhus abdominalis, small-pox, kine-pock, sheep-pock, cholera, etc / by Ernst Hallier. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    alcoholic fermentation, the form changes. The Cryptococcus clevelopes very rapidly, not by division, but by budding. 3. A^rthrococcus. In fine, when the same organs al- ready cited are put in a medium v/hich has a tendency to take on an acid fermentation, they assume an elliptic, elongated form, and are called Ai^thrococcus. VYe may hence conclude, that Professor Hallier's theory is just the opposite of M. Pasteur's. He believes, that for every fermentation, a special ferment is needed; for exam- ple, that the Micrococcus of milk is requisite to produce lactic-acid fermentation, while M. Hallier, on the contrary, regards the form of the ferment as depending on the parti- cular kind of fermentation : thus, if we put ]Micrococcus in a solution of sugar, we shall obtain Cryptococcus ; if we put it into an alcoholic liquid in contact with the air, we get the acetic ferment, that is to say, the Arthrococcus. B. One has only to suppose the diverse forms, enume- rated in the first section, adhering together endwise, to have those of the second section. 1. MycotJirix. These are no other than the filaments composed of Micrococcus, united together in a bead-form. This takes place when the Micrococcus is on the surface of the liquid, and consequently a little more exposed to the air, or when floating in an oxygenated liquid. These forms were formerly known as Bacteria or Leptothrix ; but as the name Leptothrix had been previously appropriated to an Alga, Hallier prefers the nomenclature of Itzigsohn, which recalls the mycologic origin of this form. 2. Torula. When the Cryptococcus are in the same condition as the Micrococcus, they produce like chains, only composed of larger joints, which have received from Myco- logists the name of Torula. 3. Mycologists have likewise given the name of Torula to 13