DISEASES OF THE LOWER ANIMALS 



ture new facts is one of the rarest and most 

 difficult tasks that man sets his hand to. The 

 nature of the disease has been discovered. It 

 is due to the bacillus of malleus. It is now 

 prevented. A serum for its early diagnosis 

 has been perfected ; it is now possible to recog- 

 nize the disease early and isolate or destroy the 

 infected animal; and glanders is becoming an 

 uncommon disease. But this knowledge has 

 been gained at a great cost. The baccillus of 

 malleus has caused the death of a number of 

 investigators working with it. A single bac- 

 teriologist at the University of Chicago 1 knows 

 of six cases among laboratory workers, all of 

 which proved fatal. The experimental biolo- 

 gist exposes himself to the disease in order 

 that other men may be less exposed to it. 



Influenza, occurring among horses, is con- Other 

 trolled by an antitoxin ; so is rinderpest, a trop- diseases. 

 ical disease of cattle. The early diagnosis of 

 tuberculosis in cattle is possible only by means 

 of the tuberculous product used for that pur- 

 pose. It is worthy of note that diseases of ani- 

 mals also attack men, notably tuberculosis, an- 

 thrax, malignant edema, trichinosis, foot-and- 

 mouth disease, hydrophobia, bubonic plague, 



Journal American Medical Association. Vol. 50. No. 20. 1908. 



139 



