The Essentials of Poultry Raising 61 



132. Diphtheria or -Avian Diphtheria. This is the mouth type 

 of roup. When roup occurs among birds, each bird should be 

 caught and its mouth opened to see if there are any sores 

 within. These sores may cover quite a surface and are accom- 

 panied by a gummy, cheesy material. In such a case the bird 

 shows symptoms much like those described above in nasal 

 roup (128). It cannot eat, and these sores may extend down 

 into the throat. With a dull knife, scrape all the material off 

 and burn the surface with a stick of nitrate of silver till all the 

 parts are white. Repeat this treatment in a few days if the 

 sores do not disappear. 



133. How to Tell Sorehead. The first sign of sorehead is a 

 depressed condition of the bird. It does not appear as lively 

 as usual, and small pimples appear on the comb, face, or wattles. 

 These are hard and red and gradually become larger. If the 

 disease is a severe one, the top becomes sore, and these sores 

 spread over much of the unfeathered part of the head. Some- 

 times the disease is very light, causing only one or two small 

 pimples or sores on the comb or wattles and not depressing the 

 bird very greatly. The disease may be spread by mosquitoes 

 or it may be spread like roup (126). 



134. How to Treat Sorehead. Take the same steps as in 

 roup (128). Apply some of the oil preparation as used in roup 

 and sore head (128) and repeat in about three days. Two 

 applications often result in a cure. The pimples and sores may 

 be touched with tincture of iodine or burnt with a stick of 

 nitrate of silver. 



