Microbic Diseases Individually Considered. 219 



ica under that of Swine-plague. It is an infectious 

 and epizootic disease characterized by the predomi- 

 nance of the pulmonary lesions. These consist of 

 broncho-pneumonic foci with or without complications 

 of pleurisy, enteritis, etc. The lung often contains 

 caseous masses ; sometimes it is gangrenous. The 

 evolution is acute or chronic ; in the first case the 

 duration of the disease is from three to nine hours on 

 an average. 



There is present, in the pulmonary lesions, pleura, 

 peritoneum and pericardium, a non-motile microbe, 

 ovoid, from l/u. to l-2tj. long by 0.6// in thickness, stain- 

 ing only at its extremities. 



The disease is inoculable to the mouse, rabbit, 

 guinea pig, chicken and pigeon, but large doses are 

 required to produce fatal results in the last three 

 species. 



It is transmitted from one hog to another by inhala- 

 tion, probably also by ingestion, and perhaps by acci- 

 dental cutaneous inoculation. 



