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The temporal dynamics of antimicrobial-resistant Salmonella enterica and predominant serovars in China

National Science Review 2023年第3期10卷 60-76页

作者： Yanan Wang Yue Liu Na Lyu Zhiyuan Li Sufang Ma Demin Cao Yuanlong Pan Yongfei Hu Hua Huang George F.Gao Xuebin Xu the Bacterium-learning Union Baoli Zhu International Joint Research Center of National Animal Immunology College of Veterinary MedicineHenan Agricultural University CAS Key Laboratory of Pathogen Microbiology and Immunology Institute of Microbiology Chinese Academy of Sciences Department of Microbiology Shanghai Municipal Center for Disease Control and Prevention Savaid Medical School University of Chinese Academy of Sciences State Key Laboratory of Animal Nutrition College of Animal Science and Technology China Agricultural University Beijing Products Quality Supervision and Inspection Institute Chinese Center for Disease Control and Prevention(China CDC) Beijing Key Laboratory of Antimicrobial Resistance and Pathogen Genomics Department of Pathogenic Biology School of Basic Medical Sciences Southwest Medical University

Salmonella enterica is one of the most common bacterial pathogens in humans and *** studies on the trends and geographical distribution of antimicrobial-resistant Salmonella and dominant serovars have been well studied in European and American countries while not in ***,taking the One-Health strategy,we used>35 000 Salmonella enterica isolates to explore the temporal and spatial dynamics of dominant serovars in *** found that Salmonella Typhimurium was the dominant serovar causing human infection in China,which was consistent with Australia but inconsistent with North American and European *** proportion of Salmonella serovars Typhimurium,London,Rissen,Corvallis,Meleagridis,Kentucky,and Goldcoast showed an increasing trend during *** randomly selected 1962 isolates for comparative genomics and antimicrobial resistance studies and found that the number of antibiotic resistance genes(ARGs) per isolate increased 1.84 and 2.69 times of human and non-human origins,respectively,spanning 14 *** proportion of antimicrobial-resistant Salmonella isolates had an increasing trend during 2006-2019,especially beta-lactam,quinolone,tetracycline,and rifampicin ***,we found that higher diversity of sequence types(STs) in *** than in other serovars,ST34 from pig and ST 19 from chicken origin,were mainly associated with isolates causing child and adult gastro-infection,*** results fill in the data gap on the trends of dominant serovars and antimicrobial resistance of Salmonella enterica in *** data provide useful information for public health decision-makers prioritizing interventions for foodborne diseases and food safety.

关键词： salmonella enterica food safety antimicrobial resistance whole-genome sequencing public health

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Time-resolved fluoroimmunoassay of zearalenone in cereals with a europium chelate as label

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Journal of Rare Earths 2009年第6期27卷 1088-1091页

作者：马智鸿黄飚张珏张艺朱岚屠蔷 Jiangsu Institute of Nuclear Medicine Key Laboratory of Nuclear MedicineMinistry of Health Department of Pharmaceutical and Molecular Biotechnology School of BiotechnologyKey Laboratory of Industrial BiotechnologyMinistry of EducationSouthern Yangtze University

A competitive indirect time-resolved fluoroimmunoassay(TRFIA) was developed for detection of zearalenone(ZEN) in cereals,in which ZEN conjugated to bovine serum albumin(BSA) is used as solid-phase antigen.A competitive indirect TRFIA was conducted by simultaneously incubating ZEN in standard or extracted samples with anti-ZEN monoclonal antibody over ZEN-BSA coated plates,and then determining the bound ZEN monoclonal antibody with goat anti-mouse europium *** were extracted with methanol/water...

关键词： time-resolved fluoroimmunoassay zearalenone europium rare earths food safety

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Bioaccumulation of heavy metals in fishes from Taihu Lake,China

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Journal of Environmental Sciences 2007年第12期19卷 1500-1504页

作者： CHI Qiao-qiao ZHU Guang-wei Alan Langdon Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China School of Science and Technology University of Waikato Hamilton New Zealand

The Cr, Zn, Cu, Cd, Pb contents were determined in Cyprinus carpio Linnaeus, Carassius auratus Linnaeus, Hypophthalmichthys molitrix and Aristichthys nobilis, which were caught from Meiliang Bay, Taihu Lake, a large, shallow and eutrophic lake of China. The results showed that：（1） the Cr, Cu, Pb, Cd contents in the edible parts of the four fish species were much lower than Chinese food Health Criterion （1994）, but the Zn contents were higher than the Criterion; （2） Cd contents were the highest in the liver of fish, Pb contents were almost the same in all organs of fish, Cr contents mainly enriched in the skin and gonads, Zn contents were the highest in the gonad （♀）, and Cu contents were the highest in the liver; （3） the total metal accumulation was the greatest in the liver and the lowest in the muscle. The total metal accumulation was the highest in C. auratus L. This investigation indicated that fish products in Taihu Lake were still safe for human consumption, but the amount consumed should be controlled under the Chinese food Health Criterion to avoid excessive intake of Zn.

关键词： fish heavy metals bioaccumulation food safety Taihu Lake

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Impact of lactic acid bacteria on the control of Listeria monocytogenes in ready-to-eat foods

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food Quality and safety 2022年第3期6卷 375-385页

作者： Laura Webb Luyao Ma Xiaonan Lu Department of food Science and Agricultural Chemistry Faculty of Agricultural and Environmental SciencesMcGill UniversitySainte-Anne de-BellevueQcCanada

Due to the increased demand for ready-to-eat(RTE)minimally processed foods,alternatives to chemical and thermal preservation methods to maintain food safety are highly demanded.A significant safety hazard in RTE food products is the growth of the foodborne pathogen Listeria monocytogenes(***).After processing,recontamination or cross-contamination of *** in RTE food products may occur and the lack of cooking can lead to an increased risk of ***,some RTE food products(*** and cured meat)can have a long processing period and shelf life,thus allowing for the growth and proliferation of *** in the food *** acid bacteria(LAB)are generally recognized as safe probiotics and have been proposed as a biological control approach to eliminate foodborne pathogens including *** have been reported to extend the shelf life of food products and inhibit pathogen proliferation via growth competition and metabolite *** are native microflora of many RTE foods,but only certain LAB may inhibit pathogen ***,the specificity of LAB species should be employed in their use in RTE *** review will discuss the antimicrobial mechanisms of LAB against ***,selective use of LAB in food matrices,and their uses in food processing and packaging.

关键词： Ready-to-eat food products lactic acid bacteria Listeria monocytogenes food safety

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Edible agro-products quality and safety in China

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Journal of Integrative Agriculture 2015年第11期14卷 2166-2175页

作者： LI Zhe-min SU Nian-si DONG Xiao-xia YANG Yan-tao WANG Yu-ting XIAO Hong-li Agricultural Information Institute Chinese Academy of Agricultural Sciences Key Laboratory of Digital Agricultural Early-Warning Technology Ministry of Agriculture Institute of Agricultural Economics and Development Chinese Academy of Agricultural Sciences Beijing Senior Expert Technology Center Chinese Academy of Sciences

Ensuring an acceptable level of edible agro-products quality and safety is necessary to provide adequate protection for con- sumers. It is the first time that we analyzed the edible agro-products quality and safety issues in the supply chain, including production, processing, circulation, and consumption. The results indicate that the agro-products quality and safety levels improves steadily, and the supervision system and standardization system are both enhanced significantly, however, certain challenges still remain in each stage of the supply chain and the entire supervision process. Finally, five recommendations regarding four aspects （production, processing, circulation, and consumption） are concluded.

关键词： edible agro-products quality and safety food safety supply chain supervision

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Molecular characterization and antibiotic resistance of Salmonella enterica serovar 1,4,[5],12:i:-environmental isolates from poultry farms

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food Quality and safety 2022年第4期6卷 579-587页

作者： Xiaojie Qin Linlin Xiao Jiaming Li Mingzhe Yang Changying Yang Qingli Dong School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghaiChina

Salmonella enterica serovar 1,4,[5],12:i:-(S.1,4,[5],12:i:-)has been recognized as an emerging foodborne pathogen in recent *** can cause human salmonellosis predominated by the contamination of animal-derived foods such as raw poultry and *** study aimed to characterize the genetic diversity,plasmid replicon types,and antibiotic resistance of 15 S.1,4,[5],12:i:-environmental isolates collected from two poultry farms using pulsed-field gel electrophoresis(PFGE),multilocus sequence typing(MLST),polymerase chain reaction-based replicon typing,and minimum inhibitory concentration *** different PFGE genotypes were detected,indicating a high diversity among these S.1,4,[5],12:i:-*** sequence types(ST19,ST1544,ST34)were identified by *** them,ST1544 was first detected in S.1,4,[5],12:i:-environmental isolates from poultry *** isolates were resistant to cefazolin,cefotetan,tobramycin,amikacin,and gentamicin,but susceptible to piperacillin-tazobactam,aztreonam,ceftazidime,cefepime,and *** incompatibility groups(Inc)of plasmids were identified,including IncFIIs(66.7%),IncHI2(20%),IncI1(6.7%),IncN(6.7%),and IncQ(6.7%).Among these isolates,80%carried at least one plasmid replicon type,and 20%carried multiple plasmid replicon ***,the multidrug-resistant isolate 263 carried numerous resistance genes(***,aac(6ʹ)-Ib-cr,bla_(TEM),bla_(CTX-M-9),bla_(OXA-1),sul1,sul2,sul3,floR,and mcr-1)and class I integronase gene intI1,which possessed both IncHI2 and IncQ plasmids,suggesting that resistance genes may be horizontally transferred by the combination of IncHI2 and IncQ ***,antibiotic-resistant S.1,4,[5],12:i:-isolates were first found in poultry farm environments in China,and surveillance should be strengthened to prevent their further spread from poultry farms to foods.

关键词： Salmonella enterica serovar 1,4,,12:i:- PFGE typing MLST typing plasmid replicon typing antibiotic resistance food safety

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Using risk-benefit analysis to control Salmonella in chicken meat

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food Quality and safety 2021年第4期5卷 375-387页

作者： Eduardo Cesar Tondo Claudia Titze Hessel Gonçalves Department of food Science Institute of Food Science and Technology of the Federal University of Rio Grande do Sul-ICTA/UFRGSPorto AlegreRSBrazil

We have created a risk-benefit analysis(RBA)model to assist in food safety decision-making by analyzing Salmonella control in Brazilian chicken ***,we described the issues in a risk profile and used a 5x5 matrix to rank the risks associated with *** then classified the magnitude of benefits and costs of control measures using another ***,we verified the beneficial effects of recommended control measures using Quantitative Microbiological Risk Assessment(QMRA).The RBA classified Salmonella contamination as risk 6,indicating that control measures should be taken in the short and medium *** also recommended the adoption of biosecurity measures on farms to reduce the prevalence of Salmonella in birds,better control of carcass washings and chiller tank management,and information placement on packages and campaigns to raise the awareness of the population about the need to control Salmonella contamination before *** the other hand,it did not recommend better controls at scalding and *** confirmed the beneficial effects of the recommended control *** example,as Salmonella prevalence in poultry increased from 4.04 per cent to 50 per cent,the risk of infection per serving also increased from 0.0080 to *** better controls in washings and chiller tank management did not affect the risk of infection,it reduced Salmonella counts on *** assume that the presence of Salmonella on carcasses was due to improper thermal processing or cross-contamination,which increased the risk from 0.0080 to *** RBA demonstrated the logic involved in the adoption of control measures,and this can be helpful in the risk management of food safety issues.

关键词： Risk management risk perception food safety

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Variety-specific responses of lettuce grown in. a gravel-film technique closed hydroponic system to N supply on yield, morphology, phytochemicals, mineral content and safety

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Journal of Integrative Agriculture 2018年第11期17卷 2447-2457页

作者： Bevly M. Mampholo Martin M. Maboko Puffy Soundy Dharini Sivakumar Phytochemical food Network to Improve Nutritional Quality for Consumers Group Department of Crop Sciences Tshwane University of Technology Pretoria West Pretoria 0001 South Africa Agricultural Research CounciI-Roodeplaat Vegetable and Ornamental Plants Private Bag X293 Pretoria 0001 South Africa

Utilization of nitrogen （N） element is a common practice used to reach profitable yields in horticultural crops and N supply can be used as a tool to manipulate the enhancement of phytochemicals and minerals in vegetable crops to address consumer-oriented quality production. Hence the study was aimed to investigate the effect of N application on leaf morphology, ascorbic acid content, phenolic acids, flavonoids, mineral content, and nitrate residues in three lettuce varieties （two green leafy lettuce, Multigreen 1 and Multigreen 3; one red leafy lettuce, Multired 4） grown in a closed hydroponic system （grave^-film） at harvest. Nitrogen was applied as ammonium nitrate （NH4NO3） at six different concentrations of 0, 60, 90, 120, 150 and 180 mg L^-1. The results obtained during 2015 and 2016 seasons were similar and demonstrated variety dependent responses with respect to different N application rates. Multigreen 3 was more sensitive to N supply and showed higher amount of nitrate residue at harvest. Variety Multired 4 was less sensitive to N supply followed by Multigreen 11 Although N supply at 120 mg L^-1 improved the yield and the number of leaves in Multigreen 3, overall 90 mg L^-1 can be recommended for these lettuce varieties to improve the yield and the accumulation of ascorbic acid content, phenolic acids mainly caffeic, caftaric acids, quercetin （the important flavonoid in lettuce）, and Fe and Mn contents. Furthermore, the concentration of 90 mg L^-1 improved the antioxidant property （FRAP and ABTS^＋） and reduced the nitrate accumulation, ensuring safe food for consumers.

关键词： fertilizer application fresh weight phenolic acids antioxidant property flavonoids Fe Mn food safety

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Molecular mechanisms underlying the toxicity and detoxification of trace metals and metalloids in plants

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Journal of Integrative Plant Biology 2023年第2期65卷 570-593页

作者： Zhong Tang Han-Qing Wang Jie Chen Jia-Dong Chang Fang-Jie Zhao State Key Laboratory of Crop Genetics and Germplasm Enhancement College of Resources and Environmental SciencesNanjing Agricultural UniversityNanjing 210095China

Plants take up a wide range of trace metals/metalloids(hereinafter referred to as trace metals)from the soil,some of which are essential but become toxic at high concentrations(e.g.,Cu,Zn,Ni,Co),while others are non-essential and toxic even at relatively low concentrations(e.g.,As,Cd,Cr,Pb,and Hg).Soil contamination of trace metals is an increasing problem worldwide due to intensifying human *** metal contamination can cause toxicity and growth inhibition in plants,as well as accumulation in the edible parts to levels that threatens food safety and human *** the mechanisms of trace metal toxicity and how plants respond to trace metal stress is important for improving plant growth and food safety in contaminated *** accumulation of excess trace metals in plants can cause oxidative stress,genotoxicity,programmed cell death,and disturbance in multiple physiological *** have evolved various strategies to detoxify trace metals through cell-wall binding,complexation,vacuolar sequestration,efflux,and *** signal transduction pathways and regulatory responses are involved in plants challenged with trace metal *** this review,we discuss the recent progress in understanding the molecular mechanisms involved in trace metal toxicity,detoxification,and regulation,as well as strategies to enhance plant resistance to trace metal stresses and reduce toxic metal accumulation in food crops.

关键词： detoxification food safety stress response trace metals/metalloids toxic mechanisms

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Effect of sewage sludge and sugarcane bagasse biochar on soil properties and sugar beet production

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Pedosphere 2021年第4期31卷 572-582页

作者： Barbara Samartini Queiroz ALVES Katherin Prissila Sevilla ZELAYA Fernando COLEN Ledivan Almeida FRAZÃO Alfredo NAPOLI Sanjai J.PARIKH Luiz Arnaldo FERNANDES Department of Land Air and Water ResourcesUniversity of California-DavisDavis CA 95616(USA) Institute of Agrarian Sciences Federal University of Minas GeraisMontes Claros MG 39404547(Brazil) Department of performance of tropical production and processing systems(PERSYST) Centre de Coopération Internationale en Recherche Agronomique pour le Développement(CIRAD)Montpellier 34170(France)

Recently, biochar has shown to be an alternative to waste disposal and a source of nutrients, acting as a soil amendment. The effects of two types of biochar on soil properties and sugar beet production as well as potential for carbon(C) sequestration were evaluated: biochar produced from sewage sludge(SB) and biochar produced from a 1:1 mixture of sewage sludge and sugarcane bagasse(MB). A greenhouse pot experiment was conducted using a sandy loam soil from the Brazilian savanna under treatments of MB applications at 2.5%, 5.0%, 7.5%, and 10.0%, SB application at 5.0%, and a conventional fertilization(CF) using lime and mineral fertilizers, with no fertilization as a control. After incubation for 45 d, seedlings were transplanted into each pot and cultivated for 55 d. Biochar characterization showed that pyrolysis reduced the biomass volume drastically, but concentrated the trace elements per unit of biochar weight. The MB treatments increased soil total C(by 27.8%) and pH(by 0.6), reduced the concentrations of nutrients, except for potassium(K), and chromium(Cr), and did not significantly alter lead(Pb) and cadmium(Cd) concentrations. Results of stable isotopes showed that all biochar treatments increased the total soil C stock and stability, suggesting a potential for application in C sequestration, and improved overall soil fertility. However, the biochar treatments also increased the concentrations of trace elements in the soil and plants. The sugar beet yields at 10.0% MB and 5.0% SB corresponded to 55%and 29% of the yield obtained in the CF treatment, respectively. These results may be due to biochar nutrients not being bioavailable when required by plants or to biochar nutrient adsorption.

关键词： carbon sequestration food safety organic wastes plant fertilizers soil fertility soil organic matter fractions stable isotopes waste management

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