13° 



DISEASES OF THE DOMESTIC ANIMALS 



In the chronic form there is general malaise, cough on moving, 

 anorexia, emaciation, weakness — especially in the hind legs, con- 

 junctivitis, and more or less diarrhea. 



Autopsy.- — Petechiae are found in the lungs, heart, kidneys and 

 on the serous coat of the intestines. Swelling and congestion of the 

 lymph nodes occur. In the chronic cases elevated ulcers, the " but- 

 ton ulcers " on account of their button-like appearance, are found 

 in the large intestine up to the size of a quarter dollar. Pneumonia 

 is not a common complication. The mortality is 70 to 80 per cent. 



Swine Plague or Contagious Pneumonia of Swine is 

 often considered a wholly distinct disease. It is, however, probably 

 an infection with the invisible organism of hog cholera mixed with 

 a special infecting bacterium simulating the bacterium of septicemia 

 of rabbits. This latter organism was formerly thought to be the 

 sole source of the disease. 



Contagious Swine Pneumonia is not common in the United 

 States and is rarely met with in England, but is epizootic on the 

 continent of Europe. The symptoms may be very acute, with death 

 in a few hours, or acute or chronic, and consists chiefly in those 

 common to pneumonia and enteritis (cough, labored breathing, 

 fever, diarrhea, etc.), together with an eruption of erythema, vesicles 

 "or wheals. It is very fatal. 



Swine Erysipelas. — Mal Rouge. — This disease is also due 

 to a specific bacillus resembling that of septicemia of mice. On the 

 Continent it is reckoned very contagious, but in England inocula- 

 tion experiments and practice appear to show it is not. The germ 

 is thought to enter the body through the mouth from infected flesh, 

 feces or stagnant water. It is characterized by weakness, dulness, 

 paraplegia, and the appearance of bright-red, brown-red or purple 

 spots and vesicles on the skin, and diarrhea with death in a few 

 days with labored breathing and edema of the lungs. Hemorrhagic 

 gastro-enteritis, nephritis, swelling of spleen, and especially endocar- 

 ditis with mitral vegetations, are found post mortem. 



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