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Full text of "Pathogenic Bacteria"



"SYMPTOMATIC ANTHRAX," charbon symptomatique,
Rauschbrand, "quarter-evil," and "black-leg" are the
various names applied to a peculiar disease of cattle com-
mon during the summer season in the Bavarian Alps,
Baden, Schleswig-Holstein, and some parts of the United
States, characterized by the occurrence of irregular, em-
physematous, crepitating subcutaneous pustules. Dis-
eased areas are also found in the muscles, and are most
common over the quarters, hence the name "quarter-
evil." When incised the affected tissues have a dark
color and contain a dark, bloody serum.

The micro-organisinal nature of the disease had been
suspected from an early date, but until the work of
Faser and Bellinger the disease was confounded with
anthrax. Still later, Arloing, Thomas, Cornevin, and
Kitasato studied the disease, and succeeded in demon-
strating the specific micro-organism, which Kitasato
successfuly cultivated upon artificial media.

The bacillus which the results of these labors brought
to light is a rather large individual (3-5 p. in length,
0.5-0.6 /->- in breadth) with rounded ends. The bacilli
are occasionally united in twos, but are never united in
long chains (Fig. 128). They are actively motile (Thoinot
and Masselin say scarcely at all motile) when examined
in the hanging drop, but after a short time, perhaps
because of the exposure to the oxygen required in the
hanging-drop preparation, the movement is lost and the
bacilli die. When stained by Loffler's method a con-
siderable number of flagella can be demonstrated. Large


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