The cholera-germ : when, where, and why infectious / by Gustav Jaeger ; translated and edited by Lewis R.S. Tomalin.
- Gustav Jäger
- Date:
- 1893
Licence: Public Domain Mark
Credit: The cholera-germ : when, where, and why infectious / by Gustav Jaeger ; translated and edited by Lewis R.S. Tomalin. Source: Wellcome Collection.
Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.
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![out in the cold, and both to Pettenkofer and to Koch the saying applies— Die Teik hal er in seiner Hand, Fehlt /eider mtr das geistige Band. [The various parts within his hand he finds ; Alas! he lacks the spirit force which binds'.] When there is such a gap between the two, space may be found for a third, and this space I feel that I am in a position to fill. 1. These gentlemen have not studied factor Z, while my considerable hygienic researches, extending over many years, in connection with human beings, were directly concerned with what is called the individual tendency. In this direction I pos- sess as great and as long-standing experience as Pettenkofer with factor Y and Koch with factor X, and I can at once give the correct name to this factor Z—viz., Self-poison. Without a knowledge of the self-poisons, a subject to which I have given very extensive study, an understanding of that which is called tendency to sickening or to infection cannot be attained. 2. The disease bacteria are parasites, and it will not be dis- puted that zoologists, and next to them, botanists, are most versed in all that concerns parasites. It is a fact that until quite lately the subject of parasites was almost exclusively confined to the sciences of zoology and botany, for the large parasites of human beings which were then known have such slight capacity for induc- ing disease that pathologists were content to leave the study of them to zoologists and botanists. Even the trichina was not of sufficient importance to effect an alteration in this position of matters. A change first began with Koch, who founded bacteri- ology, which involves the study of disease-inducing minute para- sites. The great mistake, however, was at once made of pursuing bacteriology as a special study, without previously acquiring the necessary zoological-botanical knowledge respecting parasitism. The technical zoologist—and I hope that even my opponents will admit my claim to be one—possesses in the numberless observations and in the comprehensive biological investigations carried out by hundreds of men (I need merely name Leukart, Siebolo, Kuchemeister, Van Beneden, and others), splendid material for the most exact instruction respecting parasitism. Moreover, the zoologist has at his disposal a means especially well](https://iiif.wellcomecollection.org/image/b21467262_0006.jp2/full/800%2C/0/default.jpg)
