CONSTITUTIONAL DISEASES 117 



globin, 60 per cent; leukocytes, 16,000; erythrocytes. 3 600- 

 000; thrombocytes, 436,000. Differential count: Eo^mophiles 

 3 per cent; mononuclears, 4 per cent; lymphtocytes, 89 per 

 cent; mast cells, 4 per cent. vi^r,ox'« 



All efforts to isolate germs from the liver, spleen, kidne>s 

 and heart-blood were unsuccessful. .„^ +hp 



More study must be done on this disease to determine the 

 true cause, before rational treatment can be outlined. 



Treatment.— The birds should receive one-fourth 

 to one grain ferrous sulphate once a day in soft 

 feed. The prognosis is not hopeful. 



With our present knowledge we will look to 

 sanitary surroundings for the control of this con- 

 dition—clean coops and yards, good feed and 

 water. A tablespoonful of powdered ginger to 

 each dozen hens may be given once or twice a day 

 in soft feed. 



Tuberculosis 



This is a disease of great importance to the 

 poultryman, not only on account of its destructive- 

 ness to his flock, but also on account of its relation 

 to the health of himself and family; for while 

 fowls are not very likely to contract tuberculosis 

 from domestic animals or from man, yet fowls 

 that have the disease are a serious menace to the 

 other animals on the farm as well as to the poul- 

 tryman and his family. 



Cause.-^Tlie- Bacillus tiiherculosis, which was 

 discovered by Koch in 1882, is the cause of this 

 disease. There are four principal types^ of this 

 organism. The one most commonly infecting man 

 is designated as the human type. The one pecu- 

 liar to cattle is designated as the bovine type, and 

 the one peculiar to fowls the avian type; and 

 there is still another type of the tubercle bacillus 

 which affects fish and other cold-blooded animals. 



While there are some differences in the shape 



