BLOOD DISEASES 



337 



greenish and occasionally diarrhea accompanies the disease. 

 The disease is fatal in from two to three days to seven days, 

 depending on the natural resistance of the bird and the viru- 

 lency of the causative organism. 



Autopsy. — In very acute cases lesions may be absent or only 

 lightly marked. There may be hemorrhages in the serous 

 membranes as the peritoneum, pericardium or on the viscera, 

 and congestion of the liver, spleen and kidneys. In less acute 

 cases there may be edema of the subcutaneous connective tis- 

 sues of the neck and breast. The pericardium may contain a 

 quantit}^ of pale yellow, slightly cloudy fluid. Fibrinous exu- 

 date has been noted in the pericardium and peritoneum. 

 There is a catarrhal swelling of the conjunctival mucous mem- 

 branes. The mouth and nasal passage contain a ciuantity of 

 mucus. The lungs may be congested. The intestines may be 

 congested or there may be inflammation. Hemorrhages may 

 be noted. 



Treatment. — Steps should be taken as in other contagious 

 and infectious diseases. Maggiora claims that hyperimmu- 

 nized goose blood has curative properties as well as capability 

 of producing passive immunity. 



THROMBOSIS 



A bird was sent to the laboratory with the history that it 

 had been sick for several weeks. There was a partial loss of 

 appetite, finally complete 

 loss ; the bird showed weak- 

 ness and a gradual emacia- 

 tion. The hen died in 

 about two weeks after com- 

 ing to the laboratory. 



On autopsy there was 

 noted great emaciation. 

 All organs appeared nor- 

 mal except the circulatory 

 system. There was throm- 

 bosis (complete plugging) 

 of the right brachial artery 

 (artery to right wing) and 

 the same of the large ves- 

 sel to the liver, as well as 

 of the iliac and femoral 

 artery of the left side( ar- 

 tery to left leg). Upon mi- Fig. 57. Thrombos:s in a Hen. 

 CrOSCOpic e X a m i n a t ion a, pelvic bone, central portion; B, muscle 



there were found white ^^^^c, hiood v.ssei cont.in.ns a ^ta. 



