GROUSE DISEASE "— COCCIDIOSIS 



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reached practically adult life they failed to feed themselves, merely thrusting their 

 heads into the food oflered them, without attempting to swallow any of it. 



Several breeds of fowl chicks were used in experimental Coccidiosis, and each 

 lost weight steadily till death occurred. The loss of weight of one pure bred 

 Leghorn chick was very noticeable. It was first fed with coccidiau oocysts when 

 six weeks old. It and its control bird were then of equal weights {7h oz.). Two 

 months later the infected chick died, its weight at death being 5 oz., while the 

 weight of its control on the same day was 1 lb. 6 oz. 



Sample weights of other experimental birds are given below : — 



Note. — The three fowl clucks were first treated with coccidian oocysts when aged three weeks. 

 Another fowl chick fed with coccidian oocysts when aged one day, died when nine days old. The 

 pigeon squab was dosed first when aged nine days. 



Another instance of loss of weight resultant on Coccidiosis was seen in the case 

 of a pure bred female Leghorn chick which was attacked when seven weeks old by 

 Coccidiosis after drinking water fouled with coccidian oocysts. This bird became 

 " a chronic," and when adult weighed 4 lb. 3 oz., while its sister bird that acted as 

 control weighed 5 lb. 4 oz. 



Besides loss of weight the infected birds become anaemic. The cere, comb, and 

 wattles become much paler and the blood-vessels beneath the wing also look pale. 

 The head appendages gradually become more and more pale as the disease progresses, 

 and finally acquire a peculiar bluish tinge. This tint also is shown by the eyelids 

 and ears, and the legs are affected, though to a less extent. The feathers on the 



