Essentials of bacteriology; being a concise and systematic introduction to the study of bacteria and allied microörganisms . psulatus (from photograph by ProfessorSiraon Flexner). but they were probably dealing with the Bacillus aerogenescapsulatus. Bacillus Enteritidis Sporogenes (Klein, 1895).—Re-garded as identical with B. aerogenes capsulatus {q. v.). Bacillus Chauvei.—Synonyms.—Bacillus of SymptomaticAnthrax (BoUinger and Feser); Rauschbrand (German); Char-bon symptomatique (Arloing, Cornevin, and Thomas). Origin.—This bacillus, described in 1879, has been isolated,and by animal inoculat
Essentials of bacteriology; being a concise and systematic introduction to the study of bacteria and allied microörganisms . psulatus (from photograph by ProfessorSiraon Flexner). but they were probably dealing with the Bacillus aerogenescapsulatus. Bacillus Enteritidis Sporogenes (Klein, 1895).—Re-garded as identical with B. aerogenes capsulatus {q. v.). Bacillus Chauvei.—Synonyms.—Bacillus of SymptomaticAnthrax (BoUinger and Feser); Rauschbrand (German); Char-bon symptomatique (Arloing, Cornevin, and Thomas). Origin.—This bacillus, described in 1879, has been isolated,and by animal inoculation shown to be the cause of theblack-leg or quarter-evil disease of cattle. l88 ESSENTIALS OF BACTERIOLOGY Form.—^Large slender rods, which swell up at one end or inthe middle for the spore (Fig. 95). Properties.—They are motile, and liquefy gelatin quiterapidly. A rancid odor is developed in the cultures. Cultures.—The growth occurs slowly, and only in an atmos-phere of hydrogen, being anaerobic; grows best at 38° C;under 15° C. no growth. Glucose-gelatin.—In a few days little round colonies Fig. 95.—Bacilli of symptomatic anthrax, with spores ( X 1000) (Frankeland Pfeiffer). which, under low power, show hairy processes around a com-pact center. Stab-cultures in Full Test-tubes.—The first growth in thelower portion of the tube not very characteristic. Gasesdevelop after a few days, and the gelatin becomes liquid. Agar at brood temperature, in twenty-four to forty-eighthours, an abundant growth with a sour odor and abundantgas-formation. ANAEROBIC BACTERIA 189 Staining.—Ordinary methods. Grams method is nega-tive, but the spores can be colored by the regular double stainfor spores. Sugar Media.—Gas production. Milk.—Rendered acid and coagulated. Variability.—Great variation in cultures. Toxin elaborated in fluid media fatal for rabbits wheninjected intravenously. Pathogenesis.—If a small amount of the culture be injectedunder the skin
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