ACTINOMYCOSIS. 



425 



-on a farm in Yates City, where there were 80 head of cattle, and 

 1C were found to be suffering from actinomycosis. Mr. Casewell 



FIG. 180. Photograph of a steer nearly three years old, but about the size of a 

 yearling. The emaciation and deplorable aspect recall the appearance of 

 " a piner "or " waster " (tuberculosis). 



reported that the disease was prevalent in nearly every county in 

 that State, and that in his opinion it was spreading. In one 

 instance 109 cases were slaughtered. 



Actinomycosis in Relation to Tuberculosis. When we consider 

 the very high percentage of cases 

 of tuberculosis which has been 

 reported in some localities, the im- 

 portance of differentiating actino- 

 mycosis from tuberculosis cannot 

 be over-estimated. The very 

 great contrast in. the appearance 

 of the micro-organisms in the 

 two cases renders this a very 

 easy matter for the pathologist. 

 But practical veterinarians and 

 breeders of cattle are liable to 

 mistake some . manifestations of 



actinomycosis for tuberculosis. 



T , . - ,, FIG. 181. ACTIXOMYCOTIC NODULES 



It is of the greatest im- FROM THE PLEURA. 



portance to bear in mind that 



wens or clyers are really not tubercular, but actiiiomycotic ; and 



