140 



POULTRY DISEASES 



Sjmiptoms.— The appetite may be somewhat dim- 

 inished. The bird sneezes, throws its head and 

 may expel some mucus. The discharge at first is 

 watery and later becomes more or less thick 

 (mnco-pnrnlent). The eyes may show more or 

 less inflammation ( conjunctivitis) and the eyelids 



Fig. 45. Obstruction of the Trachea 



A, Showing depression (drooping wings, inability to stand, etc.) from 



partial asphyxiation. B, same chicken shown in *'A,'* just before death. 



may become adherent. The characteristic offens- 

 ive order of roup is absent. 



Treatment. — The same treatment as outlined un- 

 der roup (see page 153) has given us uniformly 

 good results. 



The following report of one of the experiments 

 by Mr. Coulton, under the direction of the author, 



