. A text-book of bacteriology; a practical treatise for students and practitioners of medicine. Bacteriology. BACILLUS COLI COMMUNIS 397 specificity of the agglutination reaction. Thus a serum which will agglutinate its homologous strains in dilutions of one 1:1,000 will often fail to agglutinate other races of Bacillus coli in dilutions of 1:500 or 1 : 600. The normal serum of adult animals and man will often agglutinate this bacillus in dilutions as high as 1 : 10 or 1 : 20—a phenomenon pos- sibly referable to its habitual presence within the body. Corrobo- rating this assumption is the obse
. A text-book of bacteriology; a practical treatise for students and practitioners of medicine. Bacteriology. BACILLUS COLI COMMUNIS 397 specificity of the agglutination reaction. Thus a serum which will agglutinate its homologous strains in dilutions of one 1:1,000 will often fail to agglutinate other races of Bacillus coli in dilutions of 1:500 or 1 : 600. The normal serum of adult animals and man will often agglutinate this bacillus in dilutions as high as 1 : 10 or 1 : 20—a phenomenon pos- sibly referable to its habitual presence within the body. Corrobo- rating this assumption is the observation of Kraus and Low/ that the serum of new-born animals possesses no such agglutinating powers. The fact that agglutinins for the colon bacillus are increased. 1 2 Tig. 85.—Bacillus coli communior. Grown in: Saccharose broth. 3 1. Dextrose, 2. Lactose, 3. in the serum of patients convalescing from typhoid fever or dysentery is probably to be explained, partly by the increase of the group agglutinins produced by the specific infecting agent, and partly by the invasion of colon bacilli, or the absorption of its products induced by the diseased state of the intestinal mucous membrane. Varieties of the Colon Bacillus.—During the earlier days of bacteriolog- ical investigations, a large number of distinct varieties of colon bacilli were described, many of which may now be dismissed as based simply 'Kraus und Low, Wien, klin. Woch., Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hiss, Philip Hanson, 1868-1913; Zinsser, Hans, 1878-1940. joint author. New York and London, D. Appleton and Company
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