Hygiene and good practices in school meal services: Organic matter on surfaces, microorganisms and health risks

Esnaf Lokantalarında Kullanılan Kesme/Doğrama Tahtalarının Gıda Güvenliği Açısından Değerlendirilmesi: İstanbul Örneği

Amaç: Çalışma, gastronomi kültürünün vazgeçilmez bir unsuru olan esnaf lokantalarında gerçekleşmesi olası kritik halk sağlığı ve gıda güvenliği risklerinin başında gelen kesme/doğrama tahtalarından kaynaklı mikrobiyal risklerin belirlenmesi amaçlanmıştır.Yöntem: Çalışma kapsamında İstanbul’un ilçeleri Büyükçekmece, Çatalca ve Silivri’de faaliyet gösteren esnaf lokantalarının mutfaklarında kullanılan kesme/doğrama tahtaların yüzeylerinden steril swap ile mikrobiyolojik numuneler alınmıştır. Numuneler uygun sıcaklık ve sürede inkübasyona bırakılarak, toplam mezofilik aerobik bakteri, Staphylococcus aureus, Escherichia coli ve küf-maya sayımı yapılmıştır.Bulgular: Kesme/doğrama tahtalarının yüzeylerinden alınan mikrobiyolojik numunelerde Staphylococcus aureus, Escherichia coli, toplam mezofil aerob bakteri sayısı ve küf - maya sayısının ortalamaları sırasıyla 0,74; 0,61; 1,53 ve 1,21 logkob/10 cm2 tespit edilmiştir. Numunelerde değişik sayılarda Staphylococcus aureus tespit edilmesi personel kaynaklı bir kontaminasyona ve yine değişik sayılarda Escherichia coli tespit edilmesi ise fekal kaynaklı bir kontaminasyona işaret etmektedir.Sonuç: Esnaf lokantalarının gıda güvenliği uygulamalarından biri olan iyi üretim uygulamalarına yeterince uyulmadığı tespit edilmiştir. Esnaf lokantalarında gıda güvenliğinin tamamen sağlanabilmesi için Hazard Analysis and Critical Control Point - Tehlike Analizleri ve Kritik Kontrol Noktaları (HACCP) gibi gıda güvenliği kontrol sistemlerinin de etkin şekilde uygulanması gerektiğini ifade etmek mümkündür.

Metagenomic Analysis of Microbial Composition Revealed Cross-Contamination Pathway of Bacteria at a Foodservice Facility

Bacterial contamination of food-contact surfaces can be a potential risk factor for food quality and safety. To evaluate the spatial and temporal variations of the potential cross-contamination routes, we conducted a biogeographical assessment of bacteria in a foodservice facility based on the diversity of microflora on each surface. To this end, we performed high-throughput amplicon sequencing of 13 food-contact and non-food contact surfaces in a foodservice facility throughout a year. The results showed that Bacillus, Acinetobacter, Streptophyta, Enterobacter, Pseudomonas, Serratia, Enhydrobacter, Staphylococcus, Paracoccus, and Lysinibacillus were the dominant genera found on the kitchen surfaces of the foodservice facility. Depending on the season, changes in Firmicute/Proteobacteria ratios were observed, and the fan becomes the main source of outdoor air contamination. The microbial flow associated with spoilage was also observed throughout food preparation. Taken together, our results would be a powerful reference to hygiene managers for improvement of food processes.

Good Practices in Home Kitchens: Construction and Validation of an Instrument for Household Food-Borne Disease Assessment and Prevention

This study aimed to develop and validate an instrument to evaluate Brazilian home kitchens’ good practices. We elaborated on the preliminary version of the check-list based on the Brazilian resolution for food safety Collegiate Board Resolution 216 (RDC 216), Collegiate Board Resolution 275 (RDC 275), the standard 22000 from the International Organization for Standardization (ISO 22000) and Codex Alimentarius. Seven experts with experience in the area participated in the check-list validation and semantic evaluation. The criteria used for the approval of the items, as to their importance for the prevention of food contamination and clarity of the wording, was the achievement of a minimum of five out of seven of agreement among the experts (W-values ≥ 0.7). Moreover, items should have a mean ≥3 for the evaluation of importance (content validation) and clarity (semantic evaluation) to be maintained in the instrument. After the expert phase, we conducted another semantic evaluation of the check-list with a focus group composed of 13 undergraduate students, one moderator, and one observer of the process, to evaluate each item regarding its clarity, considering their level of understanding of the item. The final version of the check-list was composed of 77 items, divided into four blocks. The check-list developed was validated with respect to content with a W-value of 0.86 and approved in the semantic evaluation.

Dimensioning of the physical area and required number of food handlers for school food services

ABSTRACT Objective We aimed to establish equations for dimensioning of the physical area and determining the required number of food handlers in food services of schools and to compare them with reference equations. Methods It was visited 44 municipalities located in the states of São Paulo (n=36) and Rio de Janeiro (n=8) between 2013 and 2014. The physical area for school food services was evaluated using a measuring tape. For all food services, we calculated the Maximum Attendance Capacity, which is the sum of small and large meals served during the busiest shift. A validated checklist was used to evaluate food safety practices. Linear regression models were developed to establish the proposed equations. Results In total, we evaluated 205 school units. Based on the data, the following equations were established: Equation A: area of production=15.22+(maximum attendance capacity×0.02), which estimates the minimum area needed for a school food service; and Equation B: the number of food handlers=2.17+(maximum attendance capacity×0.002), to determine the minimum number of food handlers needed. These equations were established based on school food services that presented adequate food safety practices (i.e., low health risk). Conclusion It was established new equations for calculating the size of the physical area for school food services and the required number of food handlers. These new equations can be used as a starting point in management planning of a school food service.

[Best Practices in School Food and Nutrition Units of a municipality in the state of Rio de Janeiro - Brazil]

The scope of this study was to analyze the hygienic-sanitary conditions in nine School Food and Nutrition Units (UANE) of a municipality in the state of Rio de Janeiro (Brazil). A Best Practices in School Food Checklist proposed and validated by Stedefeldt et al., containing items scored and grouped into six thematic blocks (BT) was applied. The total score (P) results per BT and the final score (PF) were obtained using the Best Practices in School Food software®. The P results in UANE were compared with the classification of Collegiate Board Resolution No. 275 of 2002 of the National Health Surveillance Agency2 and PF results were used for UANE classification. All the UANE results were partially suitable for BT building. For BT handlers, processes/procedures, environmental hygiene and equipment for controlled temperature, most had partially adequate and inadequate results. Most UANE were adequate for BT reception. The PF results classified most UANE (66.7%) as standard health risks, indicating the need for corrective measures for Best Practices in UANE and the supply of safe and healthy meals to schoolchildren.

Relationships among hygiene indicators in take-away foodservice establishments and the impact of climatic conditions

AIMS

This paper examined the relationships among hygiene indicators in take-away foodservice establishments and the impact of climatic conditions.

METHODS AND RESULTS

A total of 7545 samples were collected encompassing 2050 from food handlers' (HF) hands, 3991 from stainless steel food contact surfaces (FCS) and 1504 samples from plastic FCS. The study covered a period of 43 months. Hygiene-indicator bacteria (total plate count, Enterobacteriaceae Staphylococcus) were determined from the samples collected from 559 different take-away establishments. Climatic conditions were evaluated in respect to the outside temperature, pressure, humidity and precipitation. Logistic regression confirmed that the presence of precipitation was associated with an increased likelihood of exhibiting both Enterobacteriaceae and Staphylococcus on HF' hands as well as exhibiting Enterobacteriaceae on both types of FCS. Numerable Enterobacteriaceae and Staphylococcus levels on HF' hands were detected when higher outside temperatures and higher precipitations occurred. Higher outside temperatures were observed when Enterobacteriaceae were detected on both plastics (P < 0·05) and stainless steel (P > 0·05). Higher precipitation was observed when Enterobacteriaceae was detected on stainless steel while in contrast, this indicator was detected on plastics in periods with lower precipitation.

CONCLUSIONS

This research confirms relationships between hygiene indicators in take-aways and climatic conditions, mostly temperature and precipitation.

SIGNIFICANCE AND IMPACT OF THE STUDY

This study provides another perspective into the possible nature of cross-contamination and foodborne outbreaks originating in foodservice establishments and brings to attention the necessity of analysing various climatic conditions.

The existence of optimistic bias about foodborne disease by food handlers and its association with training participation and food safety performance

A positive outlook regarding future events, in which individuals find themselves less likely than others to experience negative events, is called optimistic bias (OB). The aims of this study were: 1. To ascertain the existence and measure the OB phenomenon in food handlers in relation to foodborne disease and 2. To examine the association of OB with food handlers' risk perceptions, knowledge, attitudes, self-reported practices, training participation, food safety performance of the establishments and microbiological analysis. This study examined different food businesses in Santos city, in Brazil, as follows: street food kiosks, beach kiosks, restaurants, hospitals, and school meal services. The food handlers indicated their own risk and their peers' risk of causing a foodborne disease. Responses were given on a 10cm linear scale anchored with descriptors of intensity ranging from "none" to "very high". The difference between these risk perceptions characterized a score of tendency of an OB. A structured questionnaire was administered to evaluate knowledge, attitudes, self-reported practices and food safety performance. A total of 183 food handlers participated in the study. Microbiological analyses were conducted with ready-to-eat foods/preparations from selected sites. The food handlers perceived themselves as less likely than their peers to cause a foodborne disease (p<0.001), demonstrating the tendency of an OB. Food handlers who had undergone some training presented lower scores for the perceived risk of themselves being responsible for a foodborne disease and higher knowledge than did untrained individuals. Hospitals, schools and restaurants performed better than street food group considering food safety performance. However, microorganisms were found in food samples from hospitals. This result may be motivated by OB and other subjective factors. Apparently, this positive outlook of food handlers is associated with training participation, lethality perception and correlating positively with age. No association was found between OB scores and knowledge, attitudes and self-reported practices. Since OB may lead individuals to adopt inappropriate or dangerous behavior, strategies for debiasing food handlers should be designed.

Diversity of bacterial communities of fitness center surfaces in a U.S. metropolitan area

Public fitness centers and exercise facilities have been implicated as possible sources for transmitting community-acquired bacterial infections. However, the overall diversity of the bacterial community residing on the surfaces in these indoor environments is still unknown. In this study, we investigated the overall bacterial ecology of selected fitness centers in a metropolitan area (Memphis, TN, USA) utilizing culture-independent pyrosequencing of the 16S rRNA genes. Samples were collected from the skin-contact surfaces (e.g., exercise instruments, floor mats, handrails, etc.) within fitness centers. Taxonomical composition revealed the abundance of Firmicutes phyla, followed by Proteobacter and Actinobacteria, with a total of 17 bacterial families and 25 bacterial genera. Most of these bacterial genera are of human and environmental origin (including, air, dust, soil, and water). Additionally, we found the presence of some pathogenic or potential pathogenic bacterial genera including Salmonella, Staphylococcus, Klebsiella, and Micrococcus. Staphylococcus was found to be the most prevalent genus. Presence of viable forms of these pathogens elevates risk of exposure of any susceptible individuals. Several factors (including personal hygiene, surface cleaning and disinfection schedules of the facilities) may be the reasons for the rich bacterial diversity found in this study. The current finding underscores the need to increase public awareness on the importance of personal hygiene and sanitation for public gym users.