214 ACTINOMYCOSIS 



become filled with a gray miico-purulent fluid. The lesion 

 may spread to the pleurae and even reach to the surface of 

 the body by penetrating through the thoracic wall. The 

 bronchial glands and the mucosa of the air passages may 

 also become affected. (7) Actinomycosis has been reported 

 rarely as attacking the udder, spermatic cord, brain, spleen, 

 liver, muscle, diaphragm, peritoneum, inguinal glands, vagina, 

 uterus and cervical vertebrae. 



It is stated by Salmon that in England the disease appears 

 mo.st often in the tongue, in Denmark the .soft parts of the 

 head are affected most frequently while in some parts of 

 Germany it is most frequently found in the pharynx. In the 

 United States it usually appears in the lower jaw. In man, 

 as already stated, actinomycosis rarely occurs. Here, as in 

 cattle, the appearance of the lesions vary according to the 

 nature of the part affected. In some cases the lesions 

 closely resemble those of chronic inflammation but in others 

 such as the liver or skin they are often characteristic. In the 

 lungs the lesions have frequently been mistaken for tubercle. 

 Usually the disease affects the head and if the maxillary bones 

 are attacked the teeth are usually lost. 



Actinomycosis i)i scciue. Actinomycosis appears in this 

 species in the lower jaw, larynx, lungs, wounds caused by 

 castration, in the mammar}- gland, muscle and b'ones. The 

 character of the lesions does not differ to any marked extent in 

 swine from those in cattle or man. In case of bone infection 

 purulent cavities and sinuses are formed in which the yellow 

 granules of the fungus occur. It is reported that occasionally 

 the pig suffers from generalized actinomycosis. Duncker has 

 found in the muscles of the pig a variety of the ray fungus 

 which has been called Actijioviyces miiscoloruvi siiis, to dis- 

 tinguish it if possible from the bovine species. Its relation 

 to the actinomyces bovis has not been clearly determined. It 

 is reported to have been found frequently. 



Actinomycosis in Iiorscs and sheep. In the horse, acti- 

 nomycosis of the bones, tongue, trachea, spermatic cord and 

 submaxillary glands has been ob.served. The disease is 

 reported to have been mistaken for glanders. The affection 



