DISEASES AND PARASITES OF FOWLS 383 



mends the burning of the diphtheritic patches of the 

 mouth with stick nitrate of silver (lunar caustic). A 2% 

 solution of pure carbolic acid in water applied three times 

 daily to affected birds is also recommended. When it can 

 be done without causing bleeding, the diphtheritic mem- 

 brane should be removed and the application of carbolic 

 acid continued. The germ of fowl diphtheria resembles 

 that of the human species. Attempts at the Oregon Station 

 to reproduce the disease in chickens by human baccili 

 failed, though further investigation seems necessary to 

 settle this point. In the meantime, poultrymen should ex- 

 ercise care in the handling of fowls affected with this 

 disease. 



Chicken Pox. This is a contagious disease and most 

 prevalent in damp weather. Small crusts or wart-like spots 

 appear, sometimes on the face, sometimes under the wings 

 and on different parts of the body. A simple and effective 

 remedy is to apply to the birds affected carbolated vaseline 

 or sulphur ointment. 



Cholera. This is the most fatal of all diseases, though 

 not as general as roup and tuberculosis. It is compara- 

 tively rare. The symptoms are diarrhoea, loss of appetite, 

 excessive thirst, pale comb and wattles and extreme ex- 

 haustion. Death occurs in from a few hours to two or 

 three days. There is no cure. Vigorous measures of disin- 

 fection must be taken. 



Canker. Canker is indicated by white or yellowish spots 

 in the mouth and throat and corners of the mouth. Per- 

 oxide of hydrogen is effective. Powdered chlorate of 

 potash blown through a glass tube or straw onto the spots 

 is also recommended. Use permanganate of potash in the 

 drinking water. 



Diarrhoea. There are various causes for diarrhoea be- 

 sides those already mentioned. It may be caused by im- 



