BLOOD DISEASES 



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■-T----f 



Symptoms. — There is noted a dullness, loss of 

 appetite, rapid emaciation; the head and tail are 

 down, and the bird 

 stands around in cor- 

 ners or on the roost, 

 with its eyes closed. 

 Fig'. 41 shows a photo- 

 graph of a typical 

 case. Note the attitude 

 of head, tail and 

 body. 



Another form of sep- 

 ticemia in chickens is 

 caused by a comma- 

 shaped germ, the 

 SpiriUum Metchinikovi or Vibrio Metchinikovi. 



The symptoms are similar to those of fowl chol- 

 era, except that there is no, or at most but slight. 



f.T "■' 







Fig. 40. Spirocheta Gallinarum 

 This drawing, made from a blood 

 smear, shows red blood cells 

 roval), thrombocytes and leu- 

 kocytes (round) and spirochetes 

 (corkscrew-like) . 



I'^ic. 41. Aci'TF. Spirochetosis (after Balfour) 



elevation of the temperature. Diarrhea is con 

 stantly present. Inflammation of the bowel and 

 enlarged liver (hepatitis) is noted. The disease 



