DR. KOCH IN HIS LABORATORY
THE FIRST COMMUNICATION
Relating to a Method to Cure
TUBERCULOSIS,
BY
Prof. R. KOCH, Berlin.
In a lecture, delivered by me several months ago, at the International Medical Congress, I referred to a remedy, which makes animal subjects impervious to the inoculation of Tubercle-bacilli, and in the case of diseased animals, checks the progress of the tuberculous disease. In the meantime experiments have been made with human subjects, about which I will report in the following.
Originally I intended to complete my investigations and especially gain sufficient experience concerning the practical application of the remedy and its production on a larger scale before I published anything concerning it. In spite of all precautions too much has already been published about it, and that distorted and exaggerated, so that I was obliged, in a way, to prevent false conceptions, to give even now a synopsis of the method as far as it has progressed at the time being. Under present circumstances it must necessarily be short and leave unanswered many important questions.
The experiments have been, and are still being made under my direction by Dr. A. Libbertz and Stabsarzt Dr. E. Pfuhl. The necessary subjects and material have been provided by Prof. Brieger from his Polyclinic, Dr. W. Levy in his Private Surgical Clinic, Geheimrath Fraentzel and Oberstabsarzt R. Koehler in the Charite-Hospital, and Geheimrath Herr v. Bergmann in the Surgical University Clinic. To all these gentlemen and their assistants I here tender my heartfelt thanks for their untiring interest which they manifested for this subject and also for the disinterested help and aid which they have offered at all times and without which it would have been impossible for me to make such progress in a few months in this difficult and responsible investigation.
As my work is far from being completed, I can not as yet make any statements relating to the origin and preparation of this remedy and reserve these for some future time.[1]
The curative is composed of a clear brown fluid, which in itself is not perishable, even without special precautionary measures. For use this fluid must be more or less diluted and these dilutions are perishable when made with distilled water; Bacterian vegetation soon develops in them and they become turbid and are no longer fit for use. To prevent this the dilutions must be sterilized through heat and be kept under cotton batting or be prepared with a 5 per cent. phenol solution which is much simpler. Through repeated heating as also through the mixture with the phenol the efficiency of the diluted solution appears to be curtailed after a time and for that reason I have always used solutions as fresh as possible.
The remedy does not act through the stomach; to effect a reliable action it must be applied subcutaneously. For our experiments we have exclusively used a syringe decided upon by myself for bacteriological purposes, which is supplied with a small india-rubber ball and which has no stamp. Such a syringe can be easily kept positively aseptic by rinsing with absolutely pure alcohol and on this we base the fact that not a single abscess has sprung from over a thousand injections.