Effective cleaning and disinfection (C 36%) were the most used products. Large variations were found in the composition of C&D agents, both regarding additives and the concentrations of biocidal agents. For drains and floors, changing C&D practices (frequency, concentration, exposure time) was reported to eliminate reoccurring L. monocytogenes by 12 out of 27 respondents. For equipment, upgrading or replacing parts were reported successful by 6 out of 20 respondents. No association was found between the active ingredient in C&D agents used and elimination of Listeria spp.. Industry guidelines should be kept updated, to support hygiene best practice and stricter requirements for environmentally friendly and low toxicity C&D agents.
Langsrud et al. (Tue,) studied this question.