DISEASES OF BEES 43 



disappears of its own accord. Extracts prepared from bees affected 

 with Paralysis in certain cases caused infection in healthy bees, 

 but porcelain filtrates were not, in his experiments, able to cause 

 infection. Bumside (1928) also described an apparently new disease 

 of the adult bee : a septicaemia caused by an organism which 

 invaded the blood of the bee, namely, Bacillus apisepticus. These 

 findings show that much remains to be discovered with respect 

 to some of the diseases of adult bees, and that a large number of 

 such diseases may exist. 



