DISEASES AND PESTS OF FOWLS 



in a comparatively short time. The form 

 of the disease, in which yellowish patches 

 develop on the throat, is dealt with under 

 diphtheria or diphtheritic roup. 



Cause. Cases of roup occur when birds 

 are subjected to draft and damp, but the 

 cause must be infection with disease germs. 

 It is believed that the almost constant pres- 

 ence of the germs is due to lack of regular 

 disinfection and to birds in the flock be- 

 lieved to have recovered from a previous 

 attack of the disease, but that, in reality, are 

 suffering from chronic roup, and are able, 

 whenever suitable conditions arise for an 

 outbreak of this disease, to infect the rest of 

 the flock through the drinking water and 

 the soil. 



Treatment. The seriousness of this dis- 

 ease makes it imperative for the poultry 

 rearer to isolate immediately any birds 

 showing any suspicious symptoms. If 

 treatment of the infected bird is taken in 

 hand early, and carried out faithfully, a 

 cure can be effected, but it is often wiser to 

 kill and burn infected stock. In treating 



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