BLOOD DISEASES 



111 



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 

 Spirillum Metchinikovi or Vibrio Metchinikovi. 



The symptoms are similar to those of fowl chol- 

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



Fig. 40. Spirocheta Gallinarum 

 This drawing, -made from a blood 

 smear, sliows red blood cells 

 (oval) , ■ thrombocytes and leu- 

 kocytes (round) and spirochetes 

 (corkserew-Iilce) . > * 



Fig. 41. Acute Spirochetosis (after Balfour) 



elevation of the temperature. Diarrhea is con 

 stantly present. Inflammation of the bowel and 

 enlarged liver (hepatitis) is noted. The disease 



