Bacterium coli (Escherich). L. and N. I. Gelatin stab culture, ten days at 22°. II. Gelatin streak culture, four days at 22°. In nature is transparent, resembling mother-of-pearl in iridescence. Compare also Plate 16, vi. III. Agar streak culture, four days at 22°. Compare also Plate 16, v. IV. Agar stab culture, two days at 22°. Stab canal. growth. Surface VI. Agar plate, four days at 22°. X 60. Deep colonies. Compare also Plate 14, vi. VII. Agar plate, four days at 22°. X 60. Part of a superficial colony. May also occasionally present forms like the bacillus acidi lactici. Compare Plate 12, Iv; Plate 14, vi; Plate 17, vi. VIII. Agar plate, three days at 22°. paler or more deeply colored. Natural size. 22°. May also be X. Bacteria with long flagella of Bacterium brassica acidæ. X 1000. Stained according to Löffler. XI. Bacterium of pigeon diphtheria surrounded by flagella. 1000. Stained according to Löffler. XII. Bacteria with one flagellum, rarely two flagella, of Bact. coli & unipolaris. X 1000. Stained according to Löffler. X. XI. XII. |