POULTRY DISIi:ASE;s AND THEIR TRE;aTMI:nT. 99 



1. In introducing new birds always procure them from unin- 

 fected flocks. 



2. Isolate all new birds and all birds that have been exhibited 

 at shows for 2 or 3 weeks to make sure that they do not develop 

 the disease. 



3. Exclude from uninfected house and yards poultry and 

 all other animals, including men, coming from those that are 

 infected. 



4. Do not use implements as hoes, shovels, etc., that have 

 been used on infected premises. 



5. Keep the birds in a good hygienic condition, well nour- 

 ished and in dry well ventilated houses and roomy yards. 



When the disease has been introduced into the flock careful 

 precaution may prevent its spread. 



1. Immediately separate from the flock any bird that shows 

 symptoms of the disease. 



2. Disinfect the yards and houses. A 5 per cent solution of 

 carbolic acid may be used on the yards. Remove the litter from 

 the houses and disinfect freely. This 5 per cent carbolic solu- 

 tion may also be followed by whitewash, or better use the cre- 

 sol solution described in Chap. II. 



3. Use potassium permanganate in all drinking water. (See 

 Chap. II.) 



4. Keep watch of the flock so that any new cases may be 

 isolated at once. 



5. Burn or bury deep all birds that die. ■ 



The disease is amenable to treatment but this treatment must 

 be individual and requires a great deal of time. It must be con- 

 tinued once or twice a day for quite a long time. It is, there- 

 fore, very expensive and consequently impracticable for ordinary 

 stock. Moreover birds apparently cured are likely to become the 

 source of infection for later outbreaks. 



Robinson well says : "I have cured many very bad cases, but 

 quit treating them years ago, because I found that as long as I 

 cured roup I had more roup to cure." No better advice than 

 is implied in this could be given. If the stock is only of ordi- 

 nary value it is better to kill all birds that develop the disease. 

 If the flock is badly infected and the disease appears again and 

 again when conditions favor its development, it is better to dis- 

 pose of the flock and disinfect thoroughly, using new runs when 



