DISEASES OF THE RESPIRATORY TRACT 43 



Before swabbing out the throat it is necessary 

 to confine the hog by placing a noose around the 

 upper jaw. The handle of the swab should be of 

 wire, so that the animal cannot bite it in two. A 

 wash of silver nitrate (one part), and water (one 

 hundred parts), or permanginate of potassium (two 

 parts), and water (one hundred parts) can be used. 



When the throat becomes ulcerated and gan- 

 grenous, treatment is of little use. 



INFLAMMATION OF THE BRONCHIAL TUBES- 

 BRONCHITIS 



Inflammation of the lining membrane of the 

 bronchial tubes may be either acute or chronic. 

 The chronic form is the more common. There ar^ 

 other forms of the disease, as croupous, capillary, 

 etc., that are classed according to the character of 

 the inflammatory lesions, but it is more convenient 

 to discuss bronchitis under the head of acute or 

 chronic. 



Causes. — Pigs are more subject to this disease 

 than older animals. The most common cause is 

 irritation from dust and lung worms. The irrita- 

 tion caused by inhaling dust may be due to other 

 than mechanical causes, as disease producing germs 

 capable of causing an inflammation of a serious 

 nature may be carried into the air passages along 

 with the dust. 



Allowing hogs to sleep around old straw stacks, 

 manure heaps, and in Overcrowded filthy pens, or 

 poorly- ventilated sleeping-quarters, can be especial- 



