1.Rapid visual detection of Vibrio parahaemolyticus by combining LAMP-CRISPR/Cas12b with heat-labile uracil-DNA glycosylase to eliminate carry-over contamination.
Fang WU ; Chen LU ; Wenhao HU ; Xin GUO ; Jiayue CHEN ; Zhidan LUO
Journal of Zhejiang University. Science. B 2023;24(8):749-754
Vibrio parahaemolyticus is a major pathogen frequently found in seafood. Rapid and accurate detection of this pathogen is important for the control of bacterial foodborne diseases and to ensure food safety. In this study, we established a one-pot system that combines uracil-DNA glycosylase (UDG), loop-mediated isothermal amplification (LAMP), and clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 12b (Cas12b) for detecting V. parahaemolyticus in seafood. This detection system can effectively perform identification using a single tube and avoid the risk of carry-over contamination.
Vibrio parahaemolyticus/genetics*
;
Uracil-DNA Glycosidase/genetics*
;
Hot Temperature
;
CRISPR-Cas Systems
;
Food Safety
2.Safe, Nourishing, Accessible Community Kitchen (S.N.A.C.K.): A community kitchen manual for public health emergencies.
Kathleen N. CRUZADA ; Leilani B. MERCADO-ASIS ; Julie T. LI-YU ; Roland PANALIGAN
Journal of Medicine University of Santo Tomas 2022;6(1):898-905
Objective: The project aims to develop a community kitchen manual for public health emergencies.
Participants: The officers and members of the Samahan ng Nagkakaisang Kababaihan ng BASECO served as community respondents for this project. These eight women were in charge of the community kitchen operations, particularly the feeding program during the COVID-19 pandemic.
Implementation: The whole project comes in three phases. The design stage was executed in phase one of this project. The phase one also focused on the development of manual content based on available literatures and considered the interviews conducted with respondents.
Discussion: The manual contains guidelines on food safety and meal preparations. Based on the interview, the proponents identified specific contents that must be included in the guidelines, as compared with the need to improve current operations of the group's community kitchen. Looking at the activities of the community, the proponents indicated the food flow guidelines to ensure a safe, nourishing and accessible community kitchen (S.N.A.C.K).
Conclusion: The designed community kitchen manual may be of use to lay groups putting up community kitchens, since there is no existing manual in the Philippines. However, phases two and three must be conducted to validate its usefulness and accuracy in the field.
Food Security ; Food Safety
3.Leading edge development of food safety.
Chinese Journal of Preventive Medicine 2022;56(5):545-548
Food safety in China has been significantly improved since the melamine crisis in 2008 and the promulgation of the first Food Safety Law in 2009. However, food safety is a long standing issue in China due to the backward productive structure of agriculture and food business. In order to further improve the food safety in China, it is critical to reach a consensus on the leading edge concept of food safety and the identification of priority areas based on the concept. The leading edge concept of food safety aims to prevent potential issues and deal with current issues based on the risk, i.e. risk-based approach, as opposed to the concept based on the hazard, i.e. hazard-based approach. Practice is to determine the key problems that need to be solved first according to the concept. This paper expounds the different food safety management strategies and measures caused by the two concepts, and lists several key food safety problems (importance and solutions) determined according to the concept of "risk-based". These examples include foodborne diseases caused by pathogenic microorganisms, antimicrobial resistance, food allergen control, risk assessment of multiple chemical hazards exposure and alternative methods in food toxicology.
China
;
Food
;
Food Safety/methods*
;
Foodborne Diseases
;
Humans
;
Risk Assessment
4.FDA Premarket Pathways for Combination Products.
Chinese Journal of Medical Instrumentation 2022;46(4):355-360
Combination products face unique R&D, manufacturing, clinical, and regulatory challenges compared to individual devices, drugs, or biological products. Based on the interpretation of the relevant policies and the latest principles of combination products, this paper expounds the FDA's guidance, application trends, and application strategies for the pre-market pathways of combination products, with a view to providing relevant information for Chinese researchers and manufacturers when they start to entry the United States market.
Commerce
;
Consumer Product Safety
;
Direct-to-Consumer Advertising
;
United States
;
United States Food and Drug Administration
5.Bioethical considerations of cell-cultured meat.
Chao WANG ; Yuanfa LIU ; Jingwen ZHOU
Chinese Journal of Biotechnology 2021;37(2):378-383
In recent years, to solve the increasingly prominent problem of the contradiction between human social development and environmental resources, artificial meat has appeared in public view more and more. Generally speaking, the artificial meat can be divided into vegetable protein meat and cell cultured meat. Among them, vegetable protein meat has gradually begun to be commercialized, and cell cultured meat is cultured with animal cells, which is more similar to the real meat. Based on the analysis of the essence of cell cultured meat, we explore the positive significance of cell cultured meat technology for the meat production industry, consumer groups, and the sustainable development of mankind in the future. From the perspective of bioethics, the research, development and production of cell cultured meat can help ensure the sustainable development of human society, improve animal welfare, reduce resource demand, improve the nutritional function of meat products, and provide new growth points for the development of other industries. In addition, the ethical risks of food safety, technology abuse and technical supervision involved in cell cultured meat production are put forward for deep consideration, hoping to provide reference for the sustainable development of artificial meat industry from the perspective of bioethics.
Animal Welfare
;
Animals
;
Food Safety
;
Humans
;
Meat
;
Meat Products
6.Factors associated with food safety knowledge and practices among meat handlers in Bangladesh: a cross-sectional study.
Md Hasan AL BANNA ; Tasnim Rahman DISU ; Satyajit KUNDU ; Bright Opoku AHINKORAH ; Keith BRAZENDALE ; Abdul-Aziz SEIDU ; Joshua OKYERE ; Nahidur RAHMAN ; Shuvajit MONDAL ; Bidyut MATUBBER ; Md Shafiqul Islam KHAN
Environmental Health and Preventive Medicine 2021;26(1):84-84
BACKGROUND:
Food handlers can play a vital role into reducing foodborne diseases by adopting appropriate food handling and sanitation practices in working plants. This study aimed to assess the factors associated with food safety knowledge and practices among meat handlers who work at butcher shops in Bangladesh.
METHODS:
A cross-sectional study was conducted among 300 meat handlers from January to March, 2021. Data were collected through in-person interviews using a structured questionnaire. The questionnaire consisted of three parts; socio-demographic characteristics, assessments of food safety knowledge, and food safety practices. A multiple logistic regression model was used to identify the factors associated with food safety knowledge and practices.
RESULTS:
Only 20% [95% confidence interval, (CI) 15.7-24.7] and 16.3% (95% CI 12.3-20.7) of the respondents demonstrated good levels of food safety knowledge and practices, respectively. The factors associated with good levels of food safety knowledge were: having a higher secondary education [adjusted odds ratio (AOR) = 4.57, 95% CI 1.11-18.76], income above 25,000 BDT/month (AOR = 10.52, 95% CI 3.43-32.26), work experience of > 10 years (AOR = 9.31, 95% CI 1.92-45.09), ≥ 8 h per day of work (AOR = 6.14, 95% CI 2.69-13.10), employed on a daily basis (AOR = 4.05, 95% CI 1.16-14.14), and having food safety training (AOR = 8.98 95% CI 2.16-37.32). Good food safety knowledge (AOR = 5.68, 95% CI 2.33-13.87) and working ≥ 8 h per day (AOR = 8.44, 95% CI 3.11-22.91) were significantly associated with a good level of food safety practice.
CONCLUSIONS
Poor knowledge and practices regarding food safety were found among Bangladeshi meat handlers. Findings may help public health professionals and practitioners develop targeted strategies to improve food safety knowledge and practices among this population. Such strategies may include education and sensitization on good food safety practices.
Adolescent
;
Adult
;
Aged
;
Bangladesh
;
Female
;
Food Handling/statistics & numerical data*
;
Food Safety/methods*
;
Health Knowledge, Attitudes, Practice
;
Humans
;
Meat
;
Middle Aged
;
Young Adult
7.Food safety knowledge, attitude, and hygiene practices of street-cooked food handlers in North Dayi District, Ghana.
Lawrence Sena TUGLO ; Percival Delali AGORDOH ; David TEKPOR ; Zhongqin PAN ; Gabriel AGBANYO ; Minjie CHU
Environmental Health and Preventive Medicine 2021;26(1):54-54
BACKGROUND:
Food safety and hygiene are currently a global health apprehension especially in unindustrialized countries as a result of increasing food-borne diseases (FBDs) and accompanying deaths. This study aimed at assessing knowledge, attitude, and hygiene practices (KAP) of food safety among street-cooked food handlers (SCFHs) in North Dayi District, Ghana.
METHODS:
This was a descriptive cross-sectional study conducted on 407 SCFHs in North Dayi District, Ghana. The World Health Organization's Five Keys to Safer Food for food handlers and a pretested structured questionnaire were adapted for data collection among stationary SCFHs along principal streets. Significant parameters such as educational status, average monthly income, registered SCFHs, and food safety training course were used in bivariate and multivariate logistic regression models to calculate the power of the relationships observed.
RESULTS:
The majority 84.3% of SCFHs were female and 56.0% had not attended a food safety training course. This study showed that 67.3%, 58.2%, and 62.9% of SCFHs had good levels of KAP of food safety, respectively. About 87.2% showed a good attitude of separating uncooked and prepared meal before storage. Good knowledge of food safety was 2 times higher among registered SCFHs compared to unregistered [cOR=1.64, p=0.032]. SCFHs with secondary education were 4 times good at hygiene practices of food safety likened to no education [aOR=4.06, p=0.003]. Above GHc1500 average monthly income earners were 5 times good at hygiene practices of food safety compared to below GHc500 [aOR=4.89, p=0.006]. Registered SCFHs were 8 times good at hygiene practice of food safety compared to unregistered [aOR=7.50, p<0.001]. The odd for good hygiene practice of food safety was 6 times found among SCFHs who had training on food safety courses likened to those who had not [aOR=5.97, p<0.001].
CONCLUSIONS
Over half of the SCFHs had good levels of KAP of food safety. Registering as SCFH was significantly associated with good knowledge and hygiene practices of food safety. Therefore, our results may present an imperative foundation for design to increase food safety and hygiene practice in the district, region, and beyond.
Adult
;
Attitude
;
Cooking/methods*
;
Cross-Sectional Studies
;
Female
;
Food Safety
;
Ghana
;
Health Knowledge, Attitudes, Practice
;
Humans
;
Hygiene
;
Male
;
Middle Aged
;
Socioeconomic Factors
;
Young Adult
8.Advances on the mechanisms regulating the formation of the biofilm of Listeria monocytogenes.
Menghua LI ; Shuaishuai YAN ; Dezhi LI ; Qing LIU
Chinese Journal of Biotechnology 2021;37(9):3151-3161
Listeria monocytogenes is an important food-borne pathogen. The distribution and survival of L. monocytogenes are related to its ability to form biofilms. Biofilms are resistant to adverse environments, and bacteria separated from the biofilms may lead to persistent food contaminations. The formation, maturation and structure of biofilms depend on a variety of external and internal factors, among which a variety of regulatory mechanisms play important roles. This review summarizes the regulatory mechanisms (including intracellular, intercellular and interspecific interactions) involved in the biofilm formation of L. monocytogenes in order to control the biofilm formation in food processing environments, thus providing new intervention strategy for food safety.
Biofilms
;
Food Contamination
;
Food Safety
;
Listeria monocytogenes
9.The role of Environmental Health in preventing antimicrobial resistance in low- and middle-income countries.
David MUSOKE ; Carol NAMATA ; Grace Biyinzika LUBEGA ; Filimin NIYONGABO ; Joviah GONZA ; Kondwani CHIDZIWISANO ; Sarah NALINYA ; Rebecca NUWEMATSIKO ; Tracy MORSE
Environmental Health and Preventive Medicine 2021;26(1):100-100
Antimicrobial resistance (AMR) is increasingly becoming a threat to global public health, not least in low- and middle-income countries (LMICs) where it is contributing to longer treatment for illnesses, use of higher generation drugs, more expenditure on antimicrobials, and increased deaths attributed to what should be treatable diseases. Some of the known causes of AMR include misuse and overuse of antimicrobials in both humans and animals, unnecessary use of antimicrobials in animals as growth promoters, and lack of awareness among the public on how to protect antimicrobials. As a result, resistant organisms are circulating in the wider environment, and there is a need to consider the One Health approach to minimise the continuing development of AMR. Environmental Health, specifically water, sanitation and hygiene (WASH), waste management, and food hygiene and safety, are key components of One Health needed to prevent the spread of antimicrobial-resistant microorganisms particularly in LMICs and reduce the AMR threat to global public health. The key Environmental Health practices in the prevention of AMR include: (1) adequate WASH through access and consumption of safe water; suitable containment, treatment and disposal of human excreta and other wastewater including from health facilities; good personal hygiene practices such as washing hands with soap at critical times to prevent the spread of resistant microorganisms, and contraction of illnesses which may require antimicrobial treatment; (2) proper disposal of solid waste, including the disposal of unused and expired antimicrobials to prevent their unnecessary exposure to microorganisms in the environment; and (3) ensuring proper food hygiene and safety practices, such as sale and consumption of animal products in which adequate antimicrobial withdrawal periods have been observed, and growing vegetables on unpolluted soil. Environmental Health is therefore crucial in the prevention of infectious diseases that would require antimicrobials, reducing the spread of resistant organisms, and exposure to antimicrobial residues in LMICs. Working with other professionals in One Health, Environmental Health Practitioners have a key role in reducing the spread of AMR including health education and promotion, surveillance, enforcement of legislation, and research.
Developing Countries
;
Disease Transmission, Infectious/prevention & control*
;
Drug Resistance, Microbial
;
Environmental Health/standards*
;
Food Safety
;
Health Personnel/standards*
;
Humans
;
Hygiene/standards*
;
Role
;
Sanitation/standards*
;
Waste Management/standards*
10.Characteristic profiles of biofilm, enterotoxins and virulence of Staphylococcus aureus isolates from dairy cows in Xinjiang Province, China
Yehui WU ; Jing LI ; Mengfan QIAO ; Dan MENG ; Qingling MENG ; Jun QIAO ; Xingxing ZHANG ; Lixia WANG ; Kuojun CAI ; Jinsheng ZHANG ; Zaichao ZHANG ; Weiwei YU ; Xuepeng CAI
Journal of Veterinary Science 2019;20(6):e74-
As an important zoonotic pathogen, Staphylococcus aureus has led to serious mastitis and endometritis in infected dairy cows. In this study, a total of 164 strains of S. aureus were isolated from dairy cows in Xinjiang Province, China, and subjected to assays to determine drug susceptibility and biofilm (BF) formation ability. Enterotoxin-related genes were detected, and the transcription levels of genes related to BF formation were determined by using reverse transcription-quantitative polymerase chain reaction. Moreover, the pathogenicity of isolates with different BF formation abilities was determined by measuring their hemolysis activity, half lethal dose (LD₅₀) and organ bacterial load. The results showed that 86.0% of S. aureus isolates could form BF. Among them, 42.1% of the strains had weak BF formation ability, and most strains with a strong BF formation ability were ica gene carriers. The S. aureus isolates displayed multidrug resistance and their drug resistance was positively correlated with their BF formation ability. Moreover, 96.3% of the S. aureus isolates carried enterotoxin genes. Among them, the detection rates of the novel enterotoxin genes were higher than those of conventional enterotoxin genes. Furthermore, isolates with a strong BF formation ability had higher LD50 but lower hemolysis ability and organ bacterial load than those of the isolates with weak or no BF ability. However, isolates without BF ability produced more severe pathological changes than those of isolates with strong BF formation ability. These findings suggest that higher BF ability and presence of novel enterotoxin genes are important characteristics of S. aureus isolates from dairy cows in Xinjiang Province, China, and such isolates may pose potential threats to food safety.
Bacterial Load
;
Biofilms
;
China
;
Drug Resistance
;
Drug Resistance, Microbial
;
Drug Resistance, Multiple
;
Endometritis
;
Enterotoxins
;
Female
;
Food Safety
;
Hemolysis
;
Lethal Dose 50
;
Mastitis
;
Polymerase Chain Reaction
;
Staphylococcus aureus
;
Staphylococcus
;
Virulence


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