INFECTIOUS DISEASES 183 



begins. The affected animals show disturbance of respi- 

 ration by coughing, dyspnea, and more or less nasal dis- 

 charge, the intensity of the pneumonic symptoms depend- 

 ing upon the extent of lung involved in the pneumonic 

 process. The physical examination of the lung is prac- 

 tically impossible because of the thick chest wall, and the 

 respiratory sounds and solidity of the lung can be a matter 



Fig. 14. HOG CHOLERA, (Early Stage). 



of conjecture only with the clinician. Conjunctivitis is 

 usually prominent in the pectoral form of cholera. Ery- 

 thema, tumefaction, and necrosis of the ear and other skin 

 surfaces are not so common in the pectoral as in the intesti- 

 nal form of the disease. Some digestive derangements 

 are always present, but they are less intensive than in 

 the intestinal form. A high temperature prevails in the 

 pectoral form, and as a rule it will average from one to 

 two degrees Fahrenheit higher than in the intestinal form. 



