CHAPTER V. 

 ACTINOMYCOSIS. 



IN 1845, Langenbeck discovered that the specific dis- 

 ease of cattle known as actinomycosis could be com- 

 municated to man. His observations, however, were not 

 given to the world until 1878, one year after Bollinger 

 had discovered the cause of the disease in animals. 



FIG. 61. Actinomyces bovis, from the tongue of a calf; x 500 (Frankel and 



Pfeiffer). 



Actinomycosis is a disease almost peculiar to the bovine 

 animals, though sometimes occurring in hogs, horses, 

 men, and other animals. 



The first manifestations of the disease are usually found 

 either about the jaw or in the tongue, in either of which 



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