CONSTITUTIONAL DISEASES 117 



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

 000; thrombocytes, 436,008. Differential count: Eosinophlles, 

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

 cent; mast cells, 4 per cent. 



All efforts to isolate germs from the liver, spleen, kidneys 

 and heart-blood were unsuccessful. 



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, hot 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. — The Bacillus tuberculosis, 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 



