518 POULTRY DISEASES /l.VD PARASITES 



lens slioiild he aiioiuteil with some penetrating oil, sucli as 

 tiie oil of caraway, or with lard, or vaseline, in wliich there 

 are a few drops of kerosene. Pure kerosene should not he 

 used, liecause it is almost impossihle to keep it from working 

 np into the feathers and scalding the skin. The anointing 

 of the legs should he repeated once or twice a week until the 

 triiiihle disa]>i)ears. 



Sunstroke. — Althougli the original hahitat of at least a 

 part of the ancestors of our domestic jioultry was a ^'ery hot 

 country, poultry, and j)articularly chickens, do not seem \ery 

 well equip])ed to stand extreme heat, and heat prostrations 

 are ([uite frequent. If the hirds are discovered soon after 

 the jjrostration occurs they may sometimes he saved hy 

 l)utting them in a cool ])lace and tying the head in cold wet 

 clothes. It is well to give them as a i)urgative two teaspoon- 

 fuls of castor oil or Ei)sona salts. 



In order to guard against numerous prostrations shade 

 should he ])ro\'ided, and during hot weather it is well to give 

 a wet mash at noon, as this tends to cool the digestive 

 tract and kecj) the hirds quiet during the heat of the 

 day. 



Tuberculosis. — This disease is caused hy a minute organism 

 wliich in many respects is quite similar to the one causing 

 tuhcrculosis in man and other mammals. It seldom apj)ears 

 in anytlung hut adult or very nearly adult stock. It is highly 

 contagious, and may be hitroduced hy means i)f hirds, the 

 Knglish sparrow heing particularly susceptihle. This disease 

 is serious, not only from the stand-point of economic loss, 

 hut liecause tuhercnlar fowls in all prohability form a 

 serious menace to the poultrymaii and his family. It is 

 popularly miderstood that a tubercular hen is not likely to 

 la>-, but this is not in accordance with the facts. Avian 

 tubercular bacilli have been found alive in eggs that ha\e 

 been ])oached, and the avian form of the organism has 

 been found along with the form common to the human 

 family in persons suffering from tuberculosis. 



In a somewhat exhaustive discussion of tuberculosis, 

 Pearl, Surface, and Curtis' make the following statement: 



' Diseases of Poultry. 



