DISH ASKS OF POULTKY. 



57 



^^/l/ifs j^/auri(s, and Aspergillus candidus. Usually 

 these fungi are found in nature growing upon dead 

 organic matter; but they have great vegetative and 

 resisting power and are able to adapt themselves to 

 various conditions of existence. Man}- species of birds 



are affected by 

 them, the dis- 

 ease caused by 

 their develop- 

 ment having been 

 observed in pig- 

 eons, pheasants, 

 fowls, ducks, 

 geese and swans, 

 as well as in vari - 

 ous cage and 

 wild])irds. Pam- 

 pered and deli- 

 cate birds are be- 

 lieved to be most 

 /requentl}' at- 

 tacked. The dis- 

 ease may take on 

 the characters of 

 an epizootic and 

 attack a large 



Fig. O.-Diatrramniatic representation f)f tlio air' number of iudi - 

 sacs stiowintr their relaliiin to each oilier, ami io 

 the lun^rs. A, trachea; B, interclavicular sac; viduals. 

 C, I). E, F, extensions of the interclavicular sac; 



G, anterior thomcic sac; H. humerus; I, poster- SVMPTOMS. In 



ior thoracic sac; J, entrance of bronchial iiieni- 



brane; K, abdominal sac. the early StagCS 



of the disease no symptoms are noticed, and it is only 

 after it has progressed considerably that these be- 

 come apparent. The affected birds do not follow the 

 flock ; they are very weak, scarcely able to stand, and, 



