OTHER DISEASES OF DOMESTIC ANIMALS. 147 
the other hand, an aérobie, it is clear that the two 
microbes cannot exist simultaneously in the blood or 
in the same culture liquid. 
The inoculation with this frésh microbe is no less 
fatal; its action is even more rapid than that of 
Bacillus anthracis, but the lesions are not the same; the 
spleen remains normal, while the liver is discoloured. 
The septic vibrio is only found in minute quantities 
in the blood, so that it has escaped the notice of many 
observers. It is, however, found in immense numbers 
in the muscles, in the serous fluid of the intestines, and 
of other organs. It is very common in the intestines, 
and is probably the beginning of putrefaction. 
VI. RABIES. 
Rabies is a canine disease which is communicated 
by a bite, and the inoculation of man and: other 
animals by the saliva. We are not yet precisely 
acquainted with the microbe which causes the disease, 
but Pasteur’s recent researches have thrown consider- 
able light on its life-history, which is still, however, 
too much involved in obscurity. 
It must first be observed that the hypothetical 
microbe of rabies, which no one has yet discovered, 
should not be confounded with the microbe of human 
saliva ; this is found in the mouths of healthy persons, 
and will be briefly discussed in the following chapter. 
