. The principles of bacteriology: a practical manual for students and physicians. bbits or guinea-pigs smallportions of garden-earth, street-dust, or decomposingorganic substances. There results a widespread oedema,with more or less gas-production in the tissues. Inthe (Edematous fluid about the site of inoculation theorganism under consideration may be detected. (, A.) It is a rod about 3 to fi long and from 1 to ;Uthick—i. e., it is about as long as bacillus anthracis, butis a trifle more slender. It is usually found in pairs,joined end to end, but may occur as longer threads;j
. The principles of bacteriology: a practical manual for students and physicians. bbits or guinea-pigs smallportions of garden-earth, street-dust, or decomposingorganic substances. There results a widespread oedema,with more or less gas-production in the tissues. Inthe (Edematous fluid about the site of inoculation theorganism under consideration may be detected. (, A.) It is a rod about 3 to fi long and from 1 to ;Uthick—i. e., it is about as long as bacillus anthracis, butis a trifle more slender. It is usually found in pairs,joined end to end, but may occur as longer threads;jiiuticularly is this the case in cultures. When in pairsthe ends that approximate are squarely cut, while thedistal extremities are rounded, When occurring singly THE BACILLUS OF MALIGNANT (EDEMA. 523 both ends are rounded. (How does it differ in thisrespect from baoillus anthraais?) It is slowly motile,and its flagella are located both at the ends and alongthe sides of the rod. It forms spores that are usuallylocated in or near the middle of the cells, causing fre- FlG. C7 C7 ^~-— B Bacillus mdematis maligni. A. aJdema-fluid, from site of inoculation ofguinea-pig, sliowing long and short threads, a. Spore-formation, fromculture. quently a swelling at the points at which they are locatedand giving to the cell a more or less oval, spindle, orlozenge shape. (Fig. 98, B.) It is an obligate anaerobe, growing on all the ordinarymedia, but not with access of oxygen. It grows well in 524 BACTERIOLOGY. Fig. £ an atmosphere of hydrogen. It causes liquefaction of gelatin. In tubes containing about 20 to 30 of gelatinthat has been liquefied, inoculated witha small amount of the culture, andthen rapidly solidified in ice-water,growth appears in the form of isolatedcolonies at or near the bottom of thetube in from two to three days at20° C. These colonies, when of to 1 mm. in diameter, appear asspheres filled with clear liquid, andare difficult, for this reason, to d
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