46 



as well. Tiiese conditions are indicated bv difficult 

 and rapid brcafhing and, Zurn says, by a peculiar tone 

 that is similar to that produced by fowls when a for- 

 eign body ei.ters the windpipe. Otherwise the birds 

 seem lively and have a fairly good appetite. It is only 

 when tliese parasites are present in enormous num- 

 bers that the disease they produce is sufficiently severe 

 as to cause death. 



The treatnu'ut of these cases is not at all satisfac- 

 tory, so that it is cheaper in the end to destroy the 

 afflicted fowls than to attempt to cure them. Upon 

 opening a bird that has died of this disease the para- 

 sites can be seen in great abundaiice in the parts men- 

 tioned. 



If treatment is attempted the inhalation of the vapor 

 of tar or of burning sulphur is as promising as any- 

 thing. 



3. PNEUMONIA CAUSED BY MOULDS. 



Several varieties of the common moulds that grow so 

 plentifully in dark, damj) places have been known to 

 enter the air passiiges of fowls, penetrate to the lungs 

 and grow there, causing a fatal pneumonia. The 

 moulds that have been discovered in this k>cality are 

 of ihree viuieties of Aspergillus and one of Mucor. It 

 is probable that they enter the lungs in the form of 

 dusl. because their spores are exceedingly small and 

 could readily pass into the lungs in this way. Then, 

 if they find the coiiditious there favorable to their 

 growth they multiply and cause little spots of disease 



