@article{kirchner_everhart_doring_smits_faircloth_duong_goulter_goodson_shelley_shumaker_et al._2022, title={Cross-Contamination to Surfaces in Consumer Kitchens with MS2 as a Tracer Organism in Ground Turkey Patties}, volume={85}, ISSN={["1944-9097"]}, DOI={10.4315/JFP-22-060}, abstractNote={It is estimated that one in five cases of foodborne illnesses is acquired in the home. However, how pathogens move around a kitchen environment when consumers are preparing food is not well characterized. The purpose of this study was to determine the prevalence and degree of cross-contamination across a variety of kitchen surfaces during a consumer meal preparation event. Consumers (n=371) prepared a meal consisting of turkey patties containing the bacteriophage MS2 as a tracer organism and a ready-to-eat lettuce salad. Half were shown a video on proper thermometer use before the trial. After meal preparation, environmental sampling and detection were performed to assess cross-contamination with MS2. For most surfaces, positivity did not exceed 20%, with the exception of spice containers, for which 48% of the samples showed evidence of MS2 cross-contamination. Spice containers also had the highest MS2 concentrations, at a mean exceeding 6 log 10 viral genome equivalent copies (GEC) per surface. The high level of MS2 on spice containers drove the significant differences between surfaces, suggesting the significance of spice containers as a vehicle for cross-contamination, despite the absence of previous reports to this effect. The thermometer safety intervention did not affect cross-contamination. The efficiency of MS2 transfer, when expressed as a percentage, was relatively low, ranging from an average of 0.002 to 0.07%. Quantitative risk assessment work using these data would aid in further understanding the significance of cross-contamination frequency and efficiency. Overall, these data will help create more targeted consumer messaging to better influence consumer cross-contamination behaviors.}, number={11}, journal={JOURNAL OF FOOD PROTECTION}, author={Kirchner, Margaret and Everhart, Savana and Doring, Lindsey and Smits, Caitlin and Faircloth, Jeremy and Duong, Minh and Goulter, Rebecca M. and Goodson, Lydia and Shelley, Lisa and Shumaker, Ellen Thomas and et al.}, year={2022}, month={Nov}, pages={1594–1603} }
 @article{shumaker_kirchner_cates_shelley_goulter_goodson_bernstein_lavallee_jaykus_chapman_2022, title={Observational Study of the Impact of a Food Safety Intervention on Consumer Poultry Washing}, volume={85}, ISSN={["1944-9097"]}, DOI={10.4315/JFP-21-397}, abstractNote={This study tested the effectiveness of an educational intervention on consumer poultry washing using video observation of meal preparation with participants who self-reported washing poultry. Treatment group participants received three emails containing messages the U.S. Department of Agriculture has used on social media (video and infographics) related to poultry preparation, including advising against washing it. Participants were observed cooking chicken thighs (inoculated with traceable nonpathogenic Escherichia coli strain DH-5 alpha) and preparing a salad to determine whether they washed the chicken and the extent of cross-contamination to the salad and areas of the kitchen. After meal preparation, participants responded to an interview about food handling behaviors, including questions about the intervention for treatment group participants. Three hundred people participated in the study (158 control, 142 treatment). The intervention effectively encouraged participants not to wash chicken before cooking; 93% of treatment group participants did not wash the chicken compared to 39% of control group participants (P<0.0001). High levels of the tracer detected in the sink and on the salad lettuce suggest that microbes transferred to the sink from the chicken, packaging, or contaminated hands are a larger cause for concern than splashing contaminated chicken fluids onto the counter. Among chicken washers, lettuce from the prepared salad was contaminated at 26% for the control group and 30% for the treatment group. For nonwashers, lettuce was contaminated at 31% for the control group and 15% for the treatment group. Hand-facilitated cross-contamination is suspected to be a factor in explaining this cross-contamination. This study demonstrates the need to change the frame of "don't wash your poultry" messaging to instead focus on preventing contamination of sinks and continuing to emphasize the importance of handwashing and cleaning and sanitizing surfaces.}, number={4}, journal={JOURNAL OF FOOD PROTECTION}, author={Shumaker, Ellen Thomas and Kirchner, Margaret and Cates, Sheryl C. and Shelley, Lisa and Goulter, Rebecca and Goodson, Lydia and Bernstein, Christopher and Lavallee, Aaron and Jaykus, Lee-Ann and Chapman, Benjamin}, year={2022}, month={Apr}, pages={615–625} }