146 POULTRY DISEASES 



tion of the. air sacs causes the difficult breathing 

 and asphyxiation. 



Inflammation is evident in the diseased areas. 

 Sections through these areas of disease show the 

 mycelia (thread-like branches of the mold) and 

 the characteristic fruit (spores). Focal necrosis, 

 preceded by cloudy swelling, is noted in the kid- 

 neys and other vital organs. A secondary in- 

 vasion of pus-producing organisms may take 

 place and on autopsy abscesses may.be found in 

 the liver, kidneys, spleen and other organs. 



Treatment.— r This is a difficult problem. Placing 

 the affected birds in a close box and smoking them 

 with tar has been advocated. Efforts should be 

 made to eradicate the disease from the premises 

 by cleaning and disinfecting them as for roup and 

 other infectious diseases. (See pages 24 and 153.) 



Swell-Head in Young Turkeys 



The most characteristic symptoms of this ail- 

 ment is swelling of certain parts of the head, 

 especially in the region of the maxillary or in- 

 fraorbital sinus, which becomes filled with a gela- 

 tinous, colorless substance. (For location of this 

 sinus see Plate I, No. 31.) 



These swellings may disappear in a few days or 

 weeks or may remain for several months. In the 

 latter instance the swelling may contain a cheesy 

 material of foul odor, and in some cases cause 

 death. 



Treatment.— Open the swollen part and allow 

 the morbid collection to drain out. In addition, 

 use the same treatment as outlined under roup. 

 (See page 153.) 



