160 



VETERINARY STUDIES 



i.e., when the germs find entrance through some cut or scratch 

 in the skin; through the mucous membrane of the mouth on 

 account of diseased teeth; or through some abrasion of the 



Fig. 54. — Actinomycosis. (M. B. B.) 

 Inferior maxilla of cow shown in Pig. 53. 



mucous membrane of the mouth, gullet, or stomach. It is also 

 generally agreed that the parasite is usually taken in with the 

 food. It is possible that this fungus may live through one stage 

 of its development, and even multiply, upon the surface or in 



Fig. 55. — Actinomycosis. (M. H. B.) 

 A badly diseased upper jaw. 



the tissues of some of the common fodder plants, particularly 

 barley and rye. Direct inoculation from one animal to another 

 usually fails to reproduce the disease. 



