. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. 414 Diphtheria and a flat surrounding zone with indented edges, and a radiated appearance. The colonies that develop upon Loffler's blood-serum mixture are rounded, yellowish-white, good sized and more or less confluent when closely approximated. They are smooth, moist and shining on the surface. They are with difl&culty differentiated from' those of Bacillus hofmanni, the pseudo-diphtheria bacillus. Gelatin.—The growth in gelatin puncture is scanty,
. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. 414 Diphtheria and a flat surrounding zone with indented edges, and a radiated appearance. The colonies that develop upon Loffler's blood-serum mixture are rounded, yellowish-white, good sized and more or less confluent when closely approximated. They are smooth, moist and shining on the surface. They are with difl&culty differentiated from' those of Bacillus hofmanni, the pseudo-diphtheria bacillus. Gelatin.—The growth in gelatin puncture is scanty, not char- acteristic, and consists of small spheric colonies along the line of inoculation. The gelatin is not Fig. 156.—Diphtheria bacilli (from photographs taken by Prof. E. K. Dun- ham, Carnegie Laboratory, New York): a, Pseudobacillus; b, true bacillus; c, pseudobacillus. Agar-agar.—Cultures upon the surface of agar-agar slants are usually meager when contracted with those upon Lofiler's blood- serum mixture, and may be whitish in color. They consist of dis- crete and confluent whitish colonies devoid of differential qualities. The oftener the organism is transplanted to fresh agar-agar, the more luxuriant its growth becomes. The growth is rapid and lux- uriant upon glycerin agar-agar. Bouillon.—When planted in bouillon a distinct, whitish, granular pellicle forms upon the surface of the clear medium. The pellicle appears quite uniform when the tube or flask is undisturbed, but it is so brittle that it at once faUs to pieces if disturbed, the minute. 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 McFarland, Joseph, 1868-. Philadelphia and London, W. B. Saunders Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbacteri, bookyear1916
