122 CIVIC BIOLOGY 



other prevalent filth mfections. If the stable fly has been 

 successfully dealt with, compare the monthly reports on cases 

 of infantile paralysis with corresponding reports of previ- 

 ous years. ^ 



Some people may object to fly campaigns on the ground 

 that flies were created for a good purpose. Any such should 

 refer to Exodus viii, 31 : 



And he [Moses] removed the swarms of flies from Pharaoh, from 

 his servants, and from his people; there remained not one. 



All we ask is that " there remain not one. 



?> 



1 While the above is passing through the proof the discovery is announced 

 that maggots of flies (species not determined) which develop in the bodies of 

 chickens dying of limber neck infect animals to which they are fed with the 

 germs of infantile paralysis, or poliomyelitis. All such fowls should be com- 

 pletely burned up. If buried, the flies easily work their way to the surface 

 and may spread the infection. (Latest evidence points to contact infection 

 by human carriers, and excludes any influence of flies or other insects in 

 spreading this disease.) 



