Elizabeth C. Redmond

Microbiological and observational analysis of cross contamination risks during domestic food preparation

The use of an observational approach in conjunction with isolation techniques for campylobacter and salmonella detection has facilitated a detailed evaluation of the risk of cross contamination during food preparation. Identification of suspected exposure routes has linked naturally contaminated raw foods with important food‐handling malpractices, contaminated contact surfaces and ready‐to‐eat foods. In a model domestic kitchen, 29 per cent of food preparation sessions resulted in positive campylobacter isolations from prepared salads, cleaning materials and food‐contact surfaces. Typing results showed that specific campylobacter strains isolated from prepared chicken salads were the same as the strains isolated from the raw chicken pieces, indicating microbial transfer during food preparation. Data obtained from this study can be used for exposure assessment, risk management and in the development of consumer risk communication strategies.

The importance of hygiene in the domestic kitchen: implications for preparation and storage of food and infant formula.

Aims: Public concerns relating to food safety remain high with most attention focused on manufactured foods and those served in catering operations. However, previous data have suggested that the home may be the main location for cases of food-borne disease. The aim of this paper is to review the microbiological risks associated with hygiene in the domestic kitchen related to food and infant formula safety. Methods: Compared to other food sectors, research on consumer food hygiene, domestic food-handling and preparation of infant formula is relatively understudied. Behavioural and microbiological studies of consumer hygiene and the domestic kitchen have been reviewed to incorporate research relating to the safety of infant formula. Results: Incidence data identify the home as an important location for acquiring food-borne disease. The domestic kitchen can be used for a variety of purposes and is often contaminated with potentially harmful micro-organisms such as Campylobacter and Salmonella. Consumer hygiene habits have frequently been found to be inadequate and relate both to microbial growth, survival and cross-contamination. Due to the reduced immune response of infants, the activities associated with the preparation of infant formula and associated bottles and equipment are of particular concern. Conclusions: Cumulatively, the data suggest that more effort should be made to educate the consumer in food hygiene, especially when the kitchen is used to reconstitute infant formula. This information needs to be provided in a form appropriate for use by consumers.

Consumer perceptions of food safety education sources

Purpose – Consumers often use inappropriate food‐handling practices and improving these could help to reduce the incidence of foodborne disease. However the development of an effective food safety education strategy is considered complex and could be improved by having a greater understanding of the consumer. This paper proposes investigating the modes and channels of communication that maybe used in education strategies.Design/methodology/approach – A self‐complete postal questionnaire was distributed to a linked demographic quota of adults in South Wales. Responses were entered into a specially constructed food safety database.Findings – Results indicated that the Environmental Health departments and UK Food Standards Agency were perceived to be the most trusted and credible organisations that can provide food safety information. The most believable spokespersons for promotion of food safety advice were determined as Environmental Health officers and the Chief Medical Officer. The most preferred source ...

A pilot study to evaluate the effectiveness of a social marketing‐based consumer food safety initiative using observation

Purpose – The purpose of this research is to aim to use observation, linked to quantitative risk‐based scoring, to evaluate the effectiveness of a small‐scale consumer food safety initiative based on the social marketing approach. Evaluation of intervention effectiveness is considered to be an important component of any health education initiative. The ultimate goal for social marketing initiatives is sustained behavioural change. Thus, when determining the effectiveness of community‐based social marketing interventions, direct measurement of behaviour is advocated.Design/methodology/approach – A small‐scale food safety strategy using targeted interventions was piloted in a geographical test community in South Wales, UK. Targeted consumers from the community prepared a set meal in a model domestic kitchen before, immediately after, and 4‐6 weeks after implementation of the strategy. Observations of meal preparations were made using CCTV and food‐handling behaviours were recorded and assessed using a risk‐...

Factors influencing the efficacy of consumer food safety communication

Purpose – The home is the location for a substantial number of cases of food poisoning and improving consumer food safety practices is important. This paper proposes investigating how consumers perceive their own abilities and level of food safety risk, as well as attitudes to different forms of interventions which is a largely unstudied area.Design/methodology/approach – Postal questionnaires were sent to a linked demographic quota of adults in South Wales. Responses were analysed using descriptive and inferential statistics.Findings – Overall the majority of consumers were positively disposed to food safety education, although variation occurred within social economic groups. The majority of respondents expressed confidence in their own abilities, although were prepared to listen to food safety advice. Respondents strongly believed it was important for television chefs to implement necessary food safety practices and indicated optimistic and social desirability bias. Information on risk could be benefic...

Assessment of consumer food safety education provided by local authorities in the UK

Purpose – The purpose of this paper is to examine the extent, sources, diversity, costs, formats and content of food safety educational interventions for consumers provided by UK Local Authorities (LAs). Inadequate implementation of food safety practices in the home is known to contribute to the incidence of foodborne disease and therefore effective food safety education concerning risks and correct domestic food‐handling behaviours is essential.Design/methodology/approach – A postal questionnaire was administered to all Environmental Health and Health Promotion departments in LAs in 2004 (n=436). The questionnaire assessed the extent of LA provision of consumer food safety advice, types, formats and content of interventions, rationale for information provision, methods used for design and delivery of information and participation in national initiatives.Findings – A considerable quantity of food safety advice is provided to UK consumers; in general this is variable between regions, variable in quality, i...

Food production and service in UK hospitals

PURPOSE The purpose of this paper is to apply value stream mapping holistically to hospital food production/service systems focused on high-quality food. DESIGN/METHODOLOGY/APPROACH Multiple embedded case study of three (two private-sector and one public-sector) hospitals in the UK. FINDINGS The results indicated various issues affecting hospital food production including: the menu and nutritional considerations; food procurement; food production; foodservice; patient perceptions/expectations. RESEARCH LIMITATIONS/IMPLICATIONS Value stream mapping is a new approach for food production systems in UK hospitals whether private or public hospitals. PRACTICAL IMPLICATIONS The paper identifies opportunities for enhancing hospital food production systems. ORIGINALITY/VALUE The paper provides a theoretical basis for process enhancement of hospital food production and the provision of high-quality hospital food.

Time-Temperature Profiling of United Kingdom Consumers' Domestic Refrigerators

Increased consumer demand for convenience and ready-to-eat food, along with changes to consumer food purchase and storage practices, have resulted in an increased reliance on refrigeration to maximize food safety. Previous research suggests that many domestic refrigerators operate at temperatures exceeding recommendations; however, the results of several studies were determined by means of one temperature data point, which, given temperature fluctuation, may not be a true indicator of actual continual operating temperatures. Data detailing actual operating temperatures and the effects of consumer practices on temperatures are limited. This study has collated the time-temperature profiles of domestic refrigerators in consumer kitchens (n = 43) over 6.5 days with concurrent self-reported refrigerator usage. Overall, the findings established a significant difference (P < 0.05) between one-off temperature (the recording of one temperature data point) and mean operating temperature. No refrigerator operated at ≤5.0°C for the entire duration of the study. Mean temperatures exceeding 5.0°C were recorded in the majority (91%) of refrigerators. No significant associations or differences were determined for temperature profiles and demographics, including household size, or refrigerator characteristics (age, type, loading, and location). A positive correlation (P < 0.05) between room temperature and refrigerator temperature was determined. Reported door opening frequency correlated with temperature fluctuation (P < 0.05). Thermometer usage was determined to be infrequent. Cumulatively, research findings have established that the majority of domestic refrigerators in consumer homes operate at potentially unsafe temperatures and that this is influenced by consumer usage. The findings from this study may be utilized to inform the development of shelf-life testing based on realistic domestic storage conditions. Furthermore, the data can inform the development of future educational interventions to increase safe domestic refrigeration practices.

Behavioral Observation and Microbiological Analysis of Older Adult Consumers' Cross-Contamination Practices in a Model Domestic Kitchen

The incidence of foodborne illness is higher in older adults because of their increased susceptibility; therefore, food safety practices are important. However, inadequate knowledge and negative attitudes toward food safety have been reported, which may increase use of unsafe food handling practices. Data on the actual food safety behaviors of older adults are lacking. In this study, food safety practices of older adults were observed and linked to microbiological analysis of kitchen surfaces to identify suspected routes of contamination. Older adults (≥60 years, n = 100) prepared a set meal in a model domestic kitchen sanitized according to a validated protocol to ensure minimal and consistent microbiological loads. Food safety behaviors were observed using ceiling-mounted cameras and recorded using a predetermined behavioral checklist. Surface microbiological contamination also was determined after food preparation. Overall, older adults frequently implemented unsafe food handling practices; 90% failed to implement adequate hand decontamination immediately after handling raw chicken. For older adults who used a larger number of adequate hand decontamination attempts, microbiological contamination levels in the kitchen following the food preparation session were significantly lower ( P < 0.001). The novel utilization of behavioral observation in conjunction with microbiological analysis facilitated identification of potentially unsafe food handling practices as suspected routes of microbiological cross-contamination in a model domestic kitchen. Findings indicate the potential impact on domestic food safety of unsafe food handling practices used by older adult consumers. This innovative approach revealed that a large proportion of older adults implement behaviors resulting in microbiological cross-contamination that may increase the risk of foodborne illness in the home.

Evaluating cabin crew food safety training using the Kirkpatrick model: an airlines’ perspective

Article published in British Food Journal on 01 July 2018 available at https://doi.org/10.1108/BFJ-07-2017-0395