1(K{ 



predisposed to tlie disease. W'heu it is severe, they 

 lose condition, develop diarrhoea, become thin, weak, 

 ragged-looking-, their heads sometimes become dark, 

 and they gradually die in an emaciated, exhausted con- 

 dition. The disease can be recognized positively after 

 death by discovering the conditiQns described above. 



Blackhead has been discovered among turkeys in 

 eastern New York, and altho-ugh its presence has not 

 been demonstrated positively among the turkeys of 

 Pennsylvania, it is quite pos- 

 sible that it exists here and 

 some outbreaks of disease 

 that have been described 

 closely resemble blackhead. 

 Our knowledge of this dis- 

 ease is so recent that as yet 

 it is only possible to experi 

 ment with remedies with a 

 view to curing the affection. 

 Dr. Smith suggests the use 

 of quinine and it may be 

 that salicylate of soda, creoliu or calomel will prove ad- 

 vantageous, but as yet the use of any drug is purely ex- 

 perimental. 



It has been shown by Dr. Moore's exeperiments that 

 the parasite of the disease exists in the droppings 

 from afflicted fov^ls, and that it may be transferred di- 

 rectly to healthy birds by keeping them where these 

 droppings have been allowed to accumulate. The mal- 

 ady has also been pro'duced in healthy turkeys by 

 feeding the diseased organs of its victims. These in 

 vestigation? are vein imi)ortnnt, b<'cause they indicate 

 a menus of avoiding Ihe s]»i'<'a(l of the dis(>ase. Old 



Liver op Turkey. 



Showing effect of protozoan dis- 

 ease. One-third natural size. 



