Commensal is defined as “characterized by a symbiotic relationship in which one species is benefited while the other is unaffected.”  Why then, do they refer to a house mouse as a commensal rodent? At Bug Zero, we won’t split hairs over the accuracy of a definition.   We’ll just make sure our Clients in the Springfield and Cape Girardeau MO areas never have to deal with mice living under their roof.  Our InsectaShield® and commercial services are designed for  to intercept pests before they move indoors including excellent mouse control.