Moreover , a study of flies including M. stabulans and M. levida has shown that fly incidence peaked about 4 -- 5 months before the occurrence of a poliomyelitis epidemic .
In these instances , food sanitation is an important preventive measure to ensure food safety .
A study of flies including M. stabulans and M. levida has shown that fly incidence peaked about 4 -- 5 months before the occurrence of a poliomyelitis epidemic .
In these instances , food sanitation is an important preventive measure to ensure food safety .