Which strategy involves exclusion of pathogen?

Certification, Inspection and Quarantine strategies involve the exclusion of pathogens.
This principle is defined as any measure that prevents the introduction of a disease-causing agent into a region, farm, or planting.
Quarantine is a restriction on the movement of people or goods so that spread of disease can be prevented. so a period when a person, plant or animal that has or may have an infectious disease must be kept away in isolation from others.
To facilitate safe global trade in agriculture by assisting the producers and exporters by providing a technically competent and reliable phytosanitary certificate system to meet the requirements of trading partners.