Wood, Escherichia coli - drug effects, Humans, Glass, Ceramics, Colony Count, Microbial, Microbial Viability, Chlorine - pharmacology, Cooking and Eating Utensils - standards, Dose-Response Relationship, Drug, Food Contamination - prevention & control, Analysis of Variance, Time Factors, Models, Biological, Stainless Steel, Disinfectants - pharmacology, Esch...