CATARRHAL DISEASES. 



955 



The disease presents itself in different forms and with different 

 symptoms, varying as the morbid process localizes itself in different 

 parts of the body, there being two principal forms. 



In'the first, or catarrhal rheumatic form, the 

 morbid process has its main seat in the respir- 

 atory organs. The mucous membrane of the 

 nostrils, larynx, windpipe, and bronchial tubes, 

 is the seat of the affection. The symptoms 

 are a short, hoarse, hacking cough, and difficult 

 breathing, with a panting motion of the flanks 

 at each breath. The head is held in a peculiar, 

 stretched, and somewhat drooping position, 

 the gait is slow and undecided, and the squeal 

 hoarse. Signs of fever are unmistakable. Some 

 animals show a tendency to vomit, and have 

 diarrhea, while others are constipated. 



In the second, or gastric rheumatic form, the principal seat of 

 the morbid process is in some of 'the abdominal organs, especially 

 in the liver, spleen, kidneys, ureters, intestines, and almost always 



Fie. 1369.— Jaw of Three- 

 months Pig. 



Fig. 1270.— Black Suffolk Sow. 



in the membrane lining the interior surface of tne abdominal cavity. 

 The symptoms differ slightly from those observed in the catarrhal 

 form. The hacking cough is more or less wanting, and the difficulty 



