presents the usual well-known appearance of a sick 

 chicken. The patches sometimes putrefy and become 

 exceedingly offei.s'ive. When they are scraped away 

 it is noticed that the tissues beneath are raw and sore. 

 The interference with breathing may be so serious tliat 

 the bird will hold its mouth open and struggle for air 

 like a chicken with gapes. The entire face is some 

 times covered with patches of false membrane, t lie- 

 eye may become affected or destroyed and the air 

 passages may be completely obstructed so that death 

 is caused by suffocation. The corner of the nioutli 

 seems to be a favorite seat for the development of diph 

 theritic false membrane. 



The disease usually follows a chronic course lasting 

 several days or several weeks. In some outbreaks, 

 however, the germ of the disease seems to be more 

 virulent than in others, and in tliese cases the birds 

 may die after the lapse of but a few days. In strong 

 individiials, and especially where the general type of 

 the outbreak is not of a very virulent character, the 

 tendency is toward recovery, but the disease is never 

 theless destiiictive, because recovered birds are fre 

 quently tiiin and unproductive for a long period. The 

 fact that fO'V Is suffering from roup do not show evi 

 dence of general disturbance until the local changes 

 are quite obvious, is due to the fact that roup is es- 

 sentially a local disease of the mucous membranes, 

 and general disease does not result until the air or 

 food passages are obstructed or interfered with by the 

 patclies, or general infection takes place. 



The treatment of roup must begin with the isolation 

 of the afflicted fowl and thorough disinfection of the 

 poultry house and yards. This disinfection should be 

 carried out with great care, and should be preceded by 



