660 



Actinomycosis. 



also cough from time to time, especially while feeding, some- 

 times also in the act of swallowing, the cough is strong, dry 

 and whistling. 



Sometimes large numbers of calves in the same herd will 

 be found alfected in the region of the larynx as manifested 

 by the appearance of firm tumors as large as a man's fist in 

 the perilaryngeal connective tissue. The presence of these 

 tumors interfere with respiration much the same as tumors 

 within the larynx, the presence of which may be recognized by 

 the wliistling, rattling or stenotic sounds produced during in- 

 spiration. 



Affection of the esophagus manifests itself in difficult 

 deglutition (dysphagia) and other symptoms of esophagus- 

 stenosis. The cause of this trouble which develops very 

 gradually is usually not disclosed until after the death of the 

 animal, although it may be suspected during life when actinomy- 

 cotic tumors are loresent on otlier parts of the body, especially 

 the neck. (In one case reported b}^ Ujheljd an affection of the 

 peribronchial and mediastinal IjTnph glands j^roduced chronic 

 meteorism.) 



The symptoms of actinomycosis of the lungs are not very 

 characteristic. In cases thus far observed only sjonptoms of 

 chronic pulmonary disease have been noted, the nature of which 



was not disclosed until post-mortem 

 examination. The bronchial secre- 

 tions in such cases might possibly 

 contain actinomyces and their dem- 

 onstration would establish the diag- 

 nosis with certainty. 



Actinom3"Cosis of the udder man- 

 ifests itself either in a firm enlarge- 

 ment of the whole organ or in the 

 appearance of firm, sharply circum- 

 scribed, somewhat painful nodes as 

 large as walnuts, which may be 

 scattered throughout the gland, but 

 particularly through the upper por- 

 tions of one or more quarters. In 

 case these nodes should discharge 

 their contents into the nulk ducts, 

 the milk of the corresponding nfilk 

 cistern will contain pus and l)e of a 

 ropy consistency; in some cases 

 there is merely a slight discharge 

 of a caseo-purulent mass. In some 

 iustances we may be able to recognize actinomyces colonies in 

 the nnlk with the unaided eye, though better with a microscope 

 (KJepzow). The supi'amammary hmiph glands are not eularged 

 as tlicy are in tuberculous disease. 



Actinomvcosis of the cerebral meninges manifests itself 



Fig. 107. Actiiioiiiycosi 



f xVr-i-(iriliiit; to Tlosz). 



of the 



