146 MICROBES, FERMENTS, AND MOULDS. 
to twenty-five days, but the animal was afterwards 
safe from further attacks of the disease. 
Cattle plague, or contagious typhus, is likewise 
ascribed to the presence of a microbe with which we 
are as yet imperfectly acquainted. 
Experimental septicemia is entitled to special men- 
tion, since it has too often been confounded with 
anthrax, and has been unskilfully produced with the 
intention of vaccinating animals in accordance with 
Pasteur’s process. This occurs when too long an 
interval (twenty-four hours) elapses after the death of 
\ 
5 
Ve? 
Fig. 71.—Sept:c vibrio, bacillus of malignant cedema (Koch): a, taken from spleen of 
guinea-pig; 6, trom a mouse’s lung. 
an animal, before taking from it the blood intended for 
vaccine cultures. After this date the blood no longer 
contains Bacillus anthracis, which is succeeded by 
another microbe termed Vibrio septicus, differing 
widely from the anthrax microbe in form, habit, and 
character (Fig. 71). Bacillus anthracis is straight and 
immobile, while the septic vibrio is sinuous, curled, 
and mobile. Moreover, it is anaérobic, and does not 
survive contact with the air, but it thrives in a vacuum 
or in carbonic acid. Since Bacillus anthracis is, on 
