. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . Fig. 156.—Bacilli of malignant edema. 1, bacilli; 2, with .spores; 3 and i, deep colonies indextrose nutrient agar. (KoUe and Wassermann.) Morphology.—The edema bacillus is a rod of from to 1^ inwidth, and of very varying length, from 2ai to lO/ti or more, accordingto the conditions of its cultivation and growth. It is usually found inpairs, joined end-to-end, but may occur in chains or long filaments. Itis motile, and does not produce a capsule. It forms spores which aresituated in or near th
. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . Fig. 156.—Bacilli of malignant edema. 1, bacilli; 2, with .spores; 3 and i, deep colonies indextrose nutrient agar. (KoUe and Wassermann.) Morphology.—The edema bacillus is a rod of from to 1^ inwidth, and of very varying length, from 2ai to lO/ti or more, accordingto the conditions of its cultivation and growth. It is usually found inpairs, joined end-to-end, but may occur in chains or long filaments. Itis motile, and does not produce a capsule. It forms spores which aresituated in or near the middle of the body of the rods, exceptionallynear the ends. The spores vary in length and are oval in form, beingoften of greater diameter than the bacilli, to which they give a more orless oval shape. The bacilli stain readily by the usual aniline colors employed and areGram-amphophile. BACILLUS WELCH 11 GROUP 447 Biology.^An obligate anaerobe growing best on or in albuminousmedia but also growing well on ordinary media especially if availablecarbohydrates are present. Growth occurs a
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