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ACTINOMYCOSIS 



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. In other organs. Actinomycosis has been reported 

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

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

 uterus and cervical vertebrae. 



Assmann has recently summarized the literature on the 

 dissemination of the lesions and has concluded that general- 



FiG. 78. Photograph of a portion of a cow's lung, showing area of 

 actinomycotic tissue surrounded by a wall of 

 connective tissue. Natural size. 



ized actinomycosis is not rare in occurrence. He gives a de- 

 tailed description of eleven cases in cattle and hogs. 



It is stated by Salmon that in England the disease ap- 

 pears most 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 

 in cattle, the appearance of the lesions varies according to the 

 part infected. In some cases the lesions closely resemble 

 those of chronic inflammation but in others, such as the liver 



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