Defining lines of separation and perimeter buffer areas

An established line of separation and perimeter buffer area plays a significant role in reducing the amount of pathogens entering and leaving poultry premises.

• The line of separation (LOS) is defined as a functional line separating poultry housing and the poultry inside (the clean side) from exterior or outside disease exposure (the dirty side). A common LOS are the walls of the poultry barn with deviations at the entry and exit sites.

• The perimeter buffer area (PBA) serves a similar purpose; however, it refers to a functional boundary surrounding the farm site that separates animal barns from areas unrelated to animal production. The poultry houses, raising areas, nearby structures, and high traffic areas related to daily functions should all be included in the Perimeter Buffer Area. Your house or equipment sheds may be outside of the PBA, since they are directly unrelated to poultry production occurring on the site.

Both of these biosecurity features need to be clearly described or illustrated in your biosecurity plan. An easy way to diagram the line of separation and perimeter buffer area on your farm is to outline an aerial image of your farm site. Watch the video below to learn how to create a diagram for your farm.