CHAPTER II. 



DISEASES OF THE BREATHING 

 ORGANS. 



A. — Those caused by parasites. 

 1. GAPE^ 



Gapes undoubtedly desti'oy more young chickens 

 than any other disease. Tt is a disease caused by a 

 small worm that occupies the upper air passages. This 

 M'omi was first discovered near Baltimore by Wiesen- 

 thai in 1791). Since then it has been described by nu- 

 merous zoologists and is at present found in all parts 

 of this country and Kui-ope. All of the domestic fowls 



Gapk Worm.— Syiiffamus trachtalis. 



Natural size and Ave times natural size. 



are attacked by it and some of the semi-wild birds. 



1h Europe it causes great loss among the pheasants. 



(*0) 



