PLATE 49. Vibrio cholera. (Koch.) Buchner. (Comma Bacillus.) I. Gelatin plate, thirty-six hours at 22°. X 60. Deep and superficial colonies. II. Gelatin plate, forty-eight hours at 22°. × 60. To the left superficial, to the right deep colonies. III. Gelatin plate, three days at 22°. X 60. Superficial colonies with zone of liquefaction. IV. Gelatin plate, three days at 22°. colonies. X 60. Deep V. Gelatin plate, four days at 22°. × 60. Superficial colony with zone of liquefaction. VI. Gelatin plate, four days at 22°. × 60. Deep colony. VII. Gelatin plate, five days at 22°. × 60. Deep colony from a culture of cholera from Hanover. VIII. Gelatin plate, five days at 22°. X 60. Superficial colony. Complete liquefaction has already taken place. IX. Gelatin plate, eight days at 22°. X 60. Superficial colony with zone of liquefaction. PLATE 50. Vibrio cholera. (Koch.) Buchner. (Comma Bacillus.) I. Gelatin plate, five days at 22°. × 60. Abnormal form of superficial colony. II. Gelatin plate, five days at 22°. X 90. Abnormal form of superficial colony. III. Gelatin plate, five days at 22°. X 60. Deeply sunken superficial colony with a strongly reflecting zone of liquefaction. IV. Gelatin plate, six days at 22°. × 60. Abnormal superficial colony, with dense nucleus, evenly sunken in and with a zone of liquefaction. V. Gelatin plate, six days at 22°. x 60. Abnormal deep colony, without halo, dark, with radiating striations, from the same plate as IV. VI. Potato culture, two days at 22°. Natural size. Soaked in soda solution before inoculation. VII. Potato culture, five days at 22°. Inoculated upon ordinary potato. |