An atlas clinical microscopy - Brossura

Brossura

ISBN 10: 1150822961 ISBN 13: 9781150822964

Riassunto

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1885 Excerpt: ... CHOLEKA. During a series of examinations made by Dr. Koch in East India and Egypt on large numbers of cholera patients and cadavers, and controlling investigations on subjects suffering from other intestinal disorders, he found peculiar to cholera, and constantly present in the dejecta or intestinal contents, a bacterium which, on account of its peculiar shape, he called " comma-bacillus." It would carry us beyond the scope of this book to follow Koch in his reasoning and proofs, and for practical purposes it will be sufficient to give a description and short life-history of the parasite, and the mode of preparation necessary for its demonstration. In its usual appearance this bacillus resembles a comma and is about one half to one third of the size of the tubercle-bacillus, but plumper and thicker. Sometimes two of these bacilli join endwise and form an S-shaped figure or a semicircle; some appear in screwshaped spirillum-shape, and appear to be a transition form. The period of vegetation of these bacteria in the intestine is very short and lasts but a few days. They require for that purpose an alkaline or neutral condition of the fluids, and for rapid propagation a mean temperature of 95 to 10é F.; a lesser degree of warmth retards their progress, and it ceases entirely below 62 F. Freezing does not destroy their vitality, neither does privation of air and oxygen, but their increase is arrested. The following substances in the proportions named destroy the germs: Alum 1: 100, camphor 1: 300, carbolic acid 1: 400, cupr. sulph. 1: 2,500, quinine 1: 5,000, corros, sublimate 1: 100,000. Drying terminates the life of the bacilli. Their propagation is, therefore, dependent on a liquid condition of the vehicle, and they can not be carried by means of the at...

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• ISBN 10: 1150822961
• ISBN 13: 9781150822964
• Rilegatura: Copertina flessibile