SYMPTOMS 



489 



it in the blood and organs. Moore, Mack and Ward have 

 failed to find this organism in the tissues. 



$ 379. Symptoms. Tliere is a watery secretion from 

 the nostrils and often from the eyes, with general weakness 

 and prostration greater than would be expected from simple 

 catarrh. The birds sit with the back arched, the head and 

 neck drawn out towards the body, the plumage roughened ; 

 the respiration is more or less obstructed, rapid and audible, 

 the vision is impaired and swallowing is difficult. There is 





,•'»?■ 



••■*-? • 

 Fig. 115. /uirly slciges of diphth critic necrosis in the throat of a pigeon. 



frequent shaking of the head, sneezing and expectoration of 

 mucous secretions. If the mouth is examined at this early 

 period the tongue is found to be pale, while small grayish 

 spots shaded with black and slightly projecting above the 

 surface, may be seen along the border, the upper surface or at 



the base. 



The following dav the condition is aggravated, the tem- 

 perature is several degrees above normal, the appetite has dis- 

 appeared and there is diarrhea with greenish or yellowish 

 evacuations. From the open beak there escapes « t^uck, 

 strin-v gravish mucus. The eyes are unnaturally dilated. 

 proieVting and possibly partly covered with the thick secretion 

 which has accumulated between the lids. The nostrils are 

 obstructed bv the thickened and dried secretion. W alking is 



