. Pathological technique; a practical manual for workers in pathological histology and bacteriology. work with this bacillus on animals, es-pecially puppies and young rabbits, it is necessary to bear inmind that the Bacillus bronchisepticus, the cause of distem-per, snuffles, etc., in animals, is often present, and that it isof the same size and occupies the same peculiar position be-tween the cilia of the cells lining the air-passages, includingthe nasal cavity. It differs from the bacillus of whooping-cough in being motile and in producing alkali in litmus-milk. Bacillus Coli Communis.—Synon
. Pathological technique; a practical manual for workers in pathological histology and bacteriology. work with this bacillus on animals, es-pecially puppies and young rabbits, it is necessary to bear inmind that the Bacillus bronchisepticus, the cause of distem-per, snuffles, etc., in animals, is often present, and that it isof the same size and occupies the same peculiar position be-tween the cilia of the cells lining the air-passages, includingthe nasal cavity. It differs from the bacillus of whooping-cough in being motile and in producing alkali in litmus-milk. Bacillus Coli Communis.—Synonyms: Bacterium colicommune; Colon bacillus. Morphology.—A medium-sized bacillus with rounded ends,often short or even coccus-like, but may grow in long forms. PATHOGENIC BACTERIA AND FUNGI. 289 Faintly staining, sharply defined areas are present in the pro-toplasm (Fig. 61). Decolorized by Grams method. 0 v-; ** ^ / V *• / 3 • 7 4 t / S . v> / Pig. 61.—Bacilli coli communis from a bouillon culture, showing the irregu-larity of staining of the bacillus ; X 2°°° (Wright and Brown).. Fig. 62.—Bacillus coli communis: superficial colony two days old upon agelatin plate ; X21 (Heim). Motility.—Usually not motile, but some varieties showsluggish independent movement. Flagella may be demonstrated by the special methods 19 29O PATHOLOGICAL TECHNIQUE. of staining. They are less numerous than in the case of thetyphoid bacillus. Blood-serum.—Rounded, grayish-white, slightly elevated,viscid-looking colonies, which may attain a diameter of3 mm. after twenty-four hours in the incubator. Gelatin Slant.—Grayish translucent strip with wavy mar-gins. The gelatin is not liquefied. Growth is more rapidthan in the case of the typhoid bacillus. A single colony on a gelatin plate in shown in Fig. 62. Glucose-gelatin Stab.—Growth along the line of stab inthe form of confluent spherical colonies, and on the surfaceabout the point of entrance of the needle as a thin graycircular
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