424 



INFECTIVE DISEASES. 



tuberculosis. Many other cases were examined, and the disease 

 was shown to be prevalent in this country. 



FIG. 178. From a photograph of a Norfolk steer. There is a growth about the 

 size of an orange in front of the throat, an example of a so-called " scrofulous " 

 or "strumous" tumour. This growth was associated with a large polypoid 

 growth in the pharynx which, by interference with deglutition, produced 

 emaciation (Fig. 180). 



In Australia actinomycosis commonly occurs in the form of 

 tumours of the upper and lower jaw, which were attributed to 



" cancer " or to " scrofulous 

 inflammation." The disease 

 is still commonly known in 

 Australia as " cancer " and 

 " lumpy jaw." 



Reports of the prevalence 

 of actinomycosis in the United 

 States have been published, 

 by the Board of Live Stock 

 Commissioners for the State 

 of Illinois. In their Report 

 for 1890 several interesting 

 communications were pub- 

 lished. Mr. Casewell, State 

 Veterinarian, investigated an 

 outbreak of this disease, known also in America as " lumpy jaw,' 



FIG. 179. A NORFOLK HEIFER WITH A 

 LARGE ' WEN " IN THE PAROTID REGION. 



