fi /1> VJ 



" LZP i- 



A MANUAL ON THE HOG. f " H > 95 



, 



tions of condition from extreme leanness to plethora, es- 

 pecially in young and growing animals, are the true sources 

 of this fearful disease. 



To these may be added the propagation of hereditary 

 blemishes. It is a well known fact that disease is trans- 

 mitted to the offspring by human parents, in whom there 

 are organic defects. 



This cannot be controlled in the human family, but can 

 be avoided in the breeding of domestic animals, by proper 

 care in the selection of the parent stock. No animal that 

 has been the subject of serions disease should be allowed to pro- 

 pagate its species, farmers should be particularly guarded 

 in this respect, in reference to hogs that have had cholera, 

 since one or more of the vital organs are always more or 

 less affected by this disease, and though they may appa- 

 rently recover, it will probably leave some vital organ per- 

 manently diseased or impaired, and these defects will be 

 transmitted to their offspring. 



Post mortem examinations have shown that the lungs 

 are invariably, more or less implicated generally seri- 

 ously. The nasal mucous membrane is generally affected, 

 and also the larynx (the upper part of the windpipe) shows 

 more or less inflammation. The heart is often diseased, 

 probably through sympathy ; the pleura is often adhered 

 to either the lungs or ribs, as the result of inflammation. 

 The liver and spleen, though not invariably, are often dis- 

 eased ; the stomach sometimes inflamed, and the bowels 

 sometimes generally, and often locally, affected. 



The kidneys and bladder sometimes, though not gen- 

 erally, show signs of disease. It will therefore appear, that 

 no important internal organ entirely escapes, though the 

 respiratory organs and passages are the most seriously af- 

 fected. 



Treatment. But little reliance can be placed^in remedies 

 for cholera, unless they are applied in the very incipiency 

 of the disease. Besides, hogs that survive attacks of this 



