118 BEEKEEPING 



Colonies affected with sacbrood also 

 show a disposition to recover from the 

 disease so that it is not quite such a hope- 

 less disorder as are the first two troubles. 



Diseases of adult bees are not so well 

 understood as are those of the brood. Bee 

 paralysis is a condition that has been ob- 

 served by many beekeepers, but in most 

 cases it is not a serious or wide-spread 

 trouble. It is probable, too, that the term 

 has been applied to more than one 

 disorder. 



Nosema-disease is probably wide-spread. 

 It is an infection of the intestinal tract of 

 adult bees and may be transmitted from 

 one colony to another. The affected bees 

 exhibit no particular symptoms but seem 

 to be able to attend to their functions 

 about as usual. Colonies affected with 

 the disease are nearly always weak and 

 show less resistance to unfavorable win- 

 ter conditions than do healthy colonies. 

 Probably much of the trouble described 

 by beekeepers as "spring dwindling" 



