Special training and feedback procedures were applied to improve the sanitation practices of nine kitchen workers who prepared the salads for a large university cafeteria. The target behaviors defining sanitation were (a) certain responses that increase the probability of microorganisms collecting on hands, and (b) handwashing following the designated microorganism-collecting responses. Behavioral effects of visual-recording equipment, sanitation training, and response feedback were systematically studied with an ABACADA design. Sanitation training lasted 30 min, and defined the target behaviors and sensitized the employees to the importance of reducing the transfer of microorganisms from hands to food: This educational approach increased the frequency of handwashing on only the first workday following the Sanitation Training. For a Feedback intervention, the kitchen supervisor and one of the authors showed individual employees their frequencies of microorganism-collecting and handwashing behaviors during the prior work period. On each day that Feedback was administered, the frequency of handwashing more than doubled the highest pre-treatment level (from a mean of 2.1 to 5.0 handwashings per day). No intervention influenced the occurrence of microorganism-collecting responses.