According to the ServSafe Manager curriculum, Integrated Pest Management (IPM) relies on three basic rules: deny pests access to the operation, deny pests food and shelter, and work with a licensed Pest Control Operator (PCO).Installing screens on windows and ventsis a primary physical barrier used to deny access. The FDA Food Code specifies that all openings to the outside must be protected against the entry of insects and rodents. Windows must be fitted with at least 16-mesh-to-the-inch screening, and vents must be properly covered.

Denying access also involves keeping exterior doors closed when not in use, installing air curtains (also called fly fans) above doorways, and sealing cracks in floors and walls with permanent sealant or copper mesh. Checking deliveriesafterthey are stored (Option B) is incorrect; deliveries should be inspectedbeforethey enter the facility to ensure pests are not being "hitched" in. While keeping garbage cans clean (Option C) is a vital sanitation practice, it serves to deny pestsfood and shelterrather than preventing their initial entry. Leaving space under equipment (Option D) is a requirement for "cleanability" so that staff can see signs of pests, but it does not stop them from entering the building. Managers must conduct regular facility "walk-throughs" to ensure that screens are not torn and that weather stripping on doors is intact. By maintaining a tight "envelope" around the building, the operation significantly reduces the biological hazards associated with pests like flies, which can carryShigellaand other pathogens.