94 



NON-SPECIFIC OR GENERAL DISEASES 



can be determined bj the odor of the air, the amount of moisture 

 present and the temperature. It is impossible to keep the air 

 witliin the stable as pure as the atmosphere outside. 



All dangers from injury by breathing impure air, or by 

 draughts can be eliminated by proper stable construction, atten- 

 tion to the ventilation and keeping the quarters clean. 



Catarrh (Cold in the Head). — Catarrh is an inflammation 



Fig. 22. — A case of catarrhal cold. 



of the mucous membrane lining the nasal cavities that usually 

 extends to the membrane lining of the sinuses of the head. It 

 may be acute or chronic. The inflammation very often extends 

 to the pharynx and larynx. Cold in the head is more common 

 in the horse than in any of the other animals (Fig. 22). 



The most common causes of '' colds " are standing or lying 

 in a draught, becoming wet, and exposure to the cold. " Colds " 

 are common during cold, changeable v^^eather. Horses that are 



