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Listeria sp. counts in concrete, open-trench floor drain 8, which was located near a liver and lung removal line at a mean temperature of 26.1°C and contained blood and meat debris. This drain was typically filled with liquid to 15 to 20% of capacity. ▪, 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.
