. Atlas and principles of bacteriology and text-book of special bacteriologic diagnosis. Bacteriology. ACTINOMYCES CHROMOGENES. 453 non Cohn. Cladothrix odorifera RuUmann (C. B. xvii, 884, and C. B. L. ii, 701). "Brauner ; Microscopic Appearance.—True branching threads, often with perceptible separation into longer and shorter rods (67, X). There is no motility, but RuUmann has seen motion in the youngest stages. On the air threads (see below), by continuous trans- verse division, short roundish members are formed (true conidia), which very readily fall off, and, upon germina-
. Atlas and principles of bacteriology and text-book of special bacteriologic diagnosis. Bacteriology. ACTINOMYCES CHROMOGENES. 453 non Cohn. Cladothrix odorifera RuUmann (C. B. xvii, 884, and C. B. L. ii, 701). "Brauner ; Microscopic Appearance.—True branching threads, often with perceptible separation into longer and shorter rods (67, X). There is no motility, but RuUmann has seen motion in the youngest stages. On the air threads (see below), by continuous trans- verse division, short roundish members are formed (true conidia), which very readily fall off, and, upon germina- tion, form new branching mycelium. ^=». Fig. 23.—Actinomyces chromogenes. Gasperini. (Upper side of a bouillon pellicle magnified about 700 times.) Staining Properties.—With all anilin dyes and by Gram's method. Relation to Oxygen.—Grows better aerobically. Requirements as Regards Temperature and Nutri- ent Media.—Thrives upon all ordinary nutrient media at room and incubator temperature, more rapidly at the latter. Gelatin Plate.—(a) Natural size: At first the colonies are brownish, round, slightly elevated, tough, dull, and begin first in the center, rarely at the periphery, to take on a whitish, chalky condition. Hereupon are formed concentric, wide, white rings; the drier (thinner) the nu- trient medium, the more rapidly there occurs a more or less complete overgrowth of the colony, with white air hyphse, and therewith a chalky appearance. The gelatin near the colony is colored dark brown and is slowly lique-. 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 Lehmann, K. B. (Karl Bernhard), 1858-1940; Neumann, Rudolf Otto, 1868- joint author; Weaver, George H. (George Howitt), b. 1866 ed. Philadelphia and London, W. B. Saunders & Company
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