CHAPTER 11. 



DISEASES OF THE BREATHING 

 ORGANS. 



A. — Those caused by parasites. 

 1. GAPES. 



Gapes undoubtedly destroy more young chickens 

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

 small worm that occu])ies the upper air passages. This 

 womi \\as first discovered near Baltimore by Wiesen- 

 thal in 1791). Sicce then it has been described by nu- 

 merous zoologists and is at present found in all parts 

 of this couuti-y and Europe. All of the domestic fowls 



Gape Worm.— Syngamustrachealis. 

 Natural size and five times natural size. 



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

 In Europe it causes great loss among the pheasants. 



