GENERAL CONSIDERATION OF DISEASE. 77 



tissues have been repaired and the normal functioning has been 

 re-established. In general, recovery is the result of the activi- 

 ties of the protective and reparative processes of the various 

 tissues of the animal bod3^ 



Partial rccoirry. — If the normal funtioning is not assumed 

 after a disease has run its course, recovery is said to be incom- 

 plete nr partial. I^artial recoverv is observed in old animals or 

 in those that have been depleted because of complications or 

 previous disease. Some diseases are essentially destructive and 

 their influence in the tissue results in incomplete repair, as in 

 tuljerctilosis, glanders, dourine, bovine contagious pleuro-pneu- 

 monia, etc. Injuries and acute inflammation of the parietics of 

 hiillow- nrgans fre(|uenth^ terminate in the formation of cicatrical 

 tissue tluis contracting the Uunen of these organs. This is coni- 

 mnn in injuries nf the oesophagus, intestine, trachea, and ure- 

 thra. Adhesions sticceeding pericarditis, pleuritis, and periton- 

 itis are examples of partial recovery. 



Dcatli. — Disease mav terminate in the cessation of all func- 

 tiuns, i. e. death. The more important specific modes of death 

 are as follows : 



1. Svncope, nr lieart failure, a result of paralysis of cardiac 

 nerves or muscles, rupture nf heart walls nr complete obstruc- 

 tion ti) emerging vessels nf the heart. Nerve paralysis may be 

 the result of poisonous products derived from infectious agen- 

 cies, or chemic poisons derived from katabolism, or hemorrhagic 

 extravasates. 



'2. Apnoea, nr respiratory failure. This may be the result of 

 paralysis of respiratnrv nerves or muscles, spasms of respiratory 

 muscles, rupture nf diaphragm, or occlusion of the respiratory 



tubes. 



?>. .\poplexv, or hemorrhage into the brain tissue. This is 

 probaljly the specific cause of death in apoplectiform anthrax. 



4. Hemorrhage, especially rapid loss of large quantities of 

 blood. Anv of the above may act independently in producing 

 death, but are probably more frequently complicated one with 

 another. 



