POUI.TRY DISEASES AND THEIR TREATMENT. II7 



ease appears in the flock separate the diseased birds, disinfect 

 the premises, and place the flock under sanitary conditions. The 

 disease will probably disappear, as it is difficult experimentally 

 to maintain an infection when the birds are kept under sanitary 

 conditions. 



Prognosis. — Diseased birds usually die in from a few hours to 

 two weeks, but they may recover. 



