348 I?JFECT1VE DISEASES. 



lungs are simultaneously affected are not numerous, and sometimes 

 the lungs may be foimd to be perfectly healthy in cases with 



Fig. 137. — Ulceeation of the Intestine in a Typical Case op Swine-Fevee. 



long-standing lesion of the intestine. Old pigs may linger on for 

 weeks, and ultimately recover, and in the meantime act as centres 

 for the dissemination of the disease. 



