FIG. 1.

Listeria sp. counts in concrete, open-trench floor drain 1, which was located near poultry meat cutting lines and contained liquid drippings from meat, including meat that had fallen on the floor. The drain was typically filled to 10 to 30% of capacity during operation. ▪, bottom side of cover; ▨, right side of drain; ▤, left side of drain; ▩, inside of drain; □, floor within ca. 30 cm of the drain. (T), CE treatment applied.