ROIT 



:;4:5 



be found in the mouth and throat patches of grayish-yellow 

 <'xudate or membranes. Death is often occasioned through 

 suffocation due to the closing of the throat by the mem- 

 brane. The swelling of the head caused by the accumula- 

 tion of the exudale in the various cavities of the head has 

 given rise to the term swell-head. 



It is considered that potassium permanganate is helpful 



Kijr. 62. Roup 

 The eye is swollen and filled with exudate as is the mouth 



both as a preventive and for the treatment of affected birds. 

 It may be added to the drinking water in sufficient quanti- 

 ties to impart a pink color to the water. The heads of the 

 affected birds may be dipped in a 1 or 2 per cent, solution 

 of the same substance. 



Roup is to be differentiated from simple catarrh, which 

 closely resembles ihe human trouble known as cold-in-the- 

 head. Simple catarrh is caused by exposure to dampness, 

 cold winds, and by improper ventilation of the houses. It 



