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Costa JCCP, Bolívar A, Alberte TM, Zurera G, Pérez-Rodríguez F. Listeria monocytogenes in aquatic food products: Spotlight on epidemiological information, bio-based mitigation strategies and predictive approaches. Microb Pathog 2024:106981. [PMID: 39349150 DOI: 10.1016/j.micpath.2024.106981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 09/16/2024] [Accepted: 09/24/2024] [Indexed: 10/02/2024]
Abstract
Listeria monocytogenes is the foodborne pathogen responsible for listeriosis in humans. Its ability to grow at refrigeration temperatures, particularly in products that support its growth and have a long-refrigerated shelf-life, poses a significant health risk, especially for vulnerable consumer groups such as pregnant woman and immunocompromised individuals. A comprehensive analysis of L. monocytogenes in aquatic food products (AFPs) was conducted, examining the prevalence of the bacterium, the associated outbreaks, and the resulting deaths. Data from 66 studies, comprising a total of 19,373 samples, were analysed from the scientific literature to determine prevalence of the pathogen. The mean pooled prevalence of L. monocytogenes was 11% (95% CI: 8-14%) among different AFPs categories. Additionally, an overview of worldwide listeriosis outbreaks associated with contaminated AFPs between 1980 and 2023 was provided, totalling 1,824 cases, including 41 deaths. Furthermore, a compilation of bio-based mitigation strategies was presented, including the use of lactic acid bacteria (LAB) and bacteriophages as bio-protective cultures to inhibit L. monocytogenes in AFPs. A variety of predictive microbiology models, based on growth prediction and interaction for Listeria, were reviewed to assess the effectiveness of control strategies in different types of AFPs, offering insights into pathogen behaviour throughout the production chain. The reported growth models described the impact of product storage temperature on pathogen growth parameters, while interaction models, based on the inhibitory effect of LAB presence against Listeria, were described using the Jameson-effect approach and Lotka-Volterra model (i.e., predator-prey model). Both models can be used to describe the simultaneous growth of two bacterial populations and their interactions. Several Quantitative Risk assessment studies have been conducted for AFP, identifying the food category as a relevant contributor in Listeriosis risk, and providing predictive insight into how storage temperature, food microbiota, product shelf-life and population aging influence the risk by L. monocytogenes. More importantly, this quantitative approach can serve as a key tool to assess the effectiveness of specific mitigation and intervention strategies to control the pathogen, such as sampling schemes or bio-preservation techniques.
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Affiliation(s)
- Jean Carlos Correia Peres Costa
- Department of Food Science and Technology, UIC Zoonosis y Enfermedades Emergentes ENZOEM, ceiA3, Universidad de Córdoba, 14014, Córdoba, Spain.
| | - Araceli Bolívar
- Department of Food Science and Technology, UIC Zoonosis y Enfermedades Emergentes ENZOEM, ceiA3, Universidad de Córdoba, 14014, Córdoba, Spain
| | - Tânia Maria Alberte
- Department of Food Engineering, Campus de Ariquemes, Federal University of Rondônia, 76872-848, Ariquemes, Brazil
| | - Gonzalo Zurera
- Department of Food Science and Technology, UIC Zoonosis y Enfermedades Emergentes ENZOEM, ceiA3, Universidad de Córdoba, 14014, Córdoba, Spain
| | - Fernando Pérez-Rodríguez
- Department of Food Science and Technology, UIC Zoonosis y Enfermedades Emergentes ENZOEM, ceiA3, Universidad de Córdoba, 14014, Córdoba, Spain
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Oh H, Lee J. Psychrotrophic Bacteria Threatening the Safety of Animal-Derived Foods: Characteristics, Contamination, and Control Strategies. Food Sci Anim Resour 2024; 44:1011-1027. [PMID: 39246535 PMCID: PMC11377203 DOI: 10.5851/kosfa.2024.e70] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/26/2024] [Accepted: 07/26/2024] [Indexed: 09/10/2024] Open
Abstract
Animal-derived foods, such as meat and dairy products, are prone to spoilage by psychrotrophic bacteria due to their high-water activity and nutritional value. These bacteria can grow at refrigerated temperatures, posing significant concerns for food safety and quality. Psychrotrophic bacteria, including Pseudomonas, Listeria, and Yersinia, not only spoil food but can also produce heat-resistant enzymes and toxins, posing health risks. This review examines the characteristics and species composition of psychrotrophic bacteria in animal-derived foods, their impact on food spoilage and safety, and contamination patterns in various products. It explores several nonthermal techniques to combat bacterial contamination as alternatives to conventional thermal methods, which can affect food quality. This review highlights the importance of developing nonthermal technologies to control psychrotrophic bacteria that threaten the cold storage of animal-derived foods. By adopting these technologies, the food industry can better ensure the safety and quality of animal-derived foods for consumers.
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Affiliation(s)
- Hyemin Oh
- Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea
| | - Jeeyeon Lee
- Department of Food & Nutrition, Dong-eui University, Busan 47340, Korea
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Panera-Martínez S, Capita R, García-Fernández C, Alonso-Calleja C. Viability and Virulence of Listeria monocytogenes in Poultry. Microorganisms 2023; 11:2232. [PMID: 37764076 PMCID: PMC10538215 DOI: 10.3390/microorganisms11092232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 08/11/2023] [Accepted: 08/18/2023] [Indexed: 09/29/2023] Open
Abstract
The prevalence of Listeria monocytogenes in 30 samples of poultry was determined using culture-dependent (isolation on OCLA and confirmation by conventional polymerase chain reaction -PCR-, OCLA&PCR) and culture-independent (real-time polymerase chain reaction, q-PCR) methods. L. monocytogenes was detected in 15 samples (50.0%) by OCLA&PCR and in 20 (66.7%) by q-PCR. The concentrations (log10 cfu/g) of L. monocytogenes (q-PCR) ranged from 2.40 to 5.22 (total cells) and from <2.15 to 3.93 (viable cells). The two methods, q-PCR using a viability marker (v-PCR) and OCLA&PCR (gold standard), were compared for their capacity to detect viable cells of L. monocytogenes, with the potential to cause human disease. The values for sensitivity, specificity and efficiency of the v-PCR were 100%, 66.7% and 83.3%, respectively. The agreement between the two methods (kappa coefficient) was 0.67. The presence of nine virulence genes (hlyA, actA, inlB, inlA, inlC, inlJ, prfA, plcA and iap) was studied in 45 L. monocytogenes isolates (three from each positive sample) using PCR. All the strains harbored between six and nine virulence genes. Fifteen isolates (33.3% of the total) did not show the potential to form biofilm on a polystyrene surface, as determined by a crystal violet assay. The remaining strains were classified as weak (23 isolates, 51.1% of the total), moderate (one isolate, 2.2%) or strong (six isolates, 13.3%) biofilm producers. The strains were tested for susceptibility to a panel of 15 antibiotics. An average of 5.11 ± 1.30 resistances per isolate was observed. When the values for resistance and for reduced susceptibility were taken jointly, this figure rose to 6.91 ± 1.59. There was a prevalence of resistance or reduced susceptibility of more than 50.0% for oxacillin, cefoxitin, cefotaxime, cefepime ciprofloxacin, enrofloxacin and nitrofurantoin. For the remaining antibiotics tested, the corresponding values ranged from 0.0% for chloramphenicol to 48.9% for rifampicin. The high prevalence and level of L. monocytogenes with numerous virulence factors in poultry underline how crucial it is to follow correct hygiene procedures during the processing of this foodstuff in order to reduce the risk of human listeriosis.
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Affiliation(s)
- Sarah Panera-Martínez
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, 24071 León, Spain
- Institute of Food Science and Technology, University of León, 24071 León, Spain
| | - Rosa Capita
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, 24071 León, Spain
- Institute of Food Science and Technology, University of León, 24071 León, Spain
| | | | - Carlos Alonso-Calleja
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, 24071 León, Spain
- Institute of Food Science and Technology, University of León, 24071 León, Spain
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Rodríguez-Melcón C, Esteves A, Carballo J, Alonso-Calleja C, Capita R. Effect of Sodium Nitrite, Nisin and Lactic Acid on the Prevalence and Antibiotic Resistance Patterns of Listeria monocytogenes Naturally Present in Poultry. Foods 2023; 12:3273. [PMID: 37685205 PMCID: PMC10486771 DOI: 10.3390/foods12173273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/09/2023] [Accepted: 08/11/2023] [Indexed: 09/10/2023] Open
Abstract
The impact of treating minced chicken meat with sodium nitrite (SN, 100 ppm), nisin (Ni, 10 ppm) and lactic acid (LA, 3000 ppm) on the levels of some microbial groups indicating hygiene quality were investigated. Specifically, aerobic plate counts and culture-based counts of psychrotrophic microorganisms and enterobacteria were obtained. Additionally, the prevalence of Listeria monocytogenes and the resistance of 245 isolates from this bacterium to 15 antibiotics were documented. L. monocytogenes was isolated using the ISO 11290-1:2017 method and confirmed with polymerase chain reaction using the lmo1030 gene. Antibiotic resistance was established using the disc diffusion technique (EUCAST and CLSI criteria). Twenty-four hours after treatment, the microbial load (log10 cfu/g) was reduced (p < 0.05) relative to controls in those samples treated with LA, with counts of 5.51 ± 1.05 (LA-treated samples) vs. 7.53 ± 1.02 (control) for APC, 5.59 ± 1.14 (LA) vs. 7.13 ± 1.07 (control) for psychrotrophic microorganisms and 2.33 ± 0.51 (LA) vs. 4.23 ± 0.88 (control) for enterobacteria. L. monocytogenes was detected in 70% (control samples), 60% (samples receiving SN), 65% (Ni) and 50% (LA) (p > 0.05) of samples. All strains showed resistance to multiple antimicrobials (between 3 and 12). In all, 225 isolates (91.8%) showed a multi-drug resistant (MDR) phenotype, and one isolate (0.4%) showed an extensively drug-resistant (XDR) phenotype. The mean number of resistances per strain was lower (p < 0.01) in the control samples, at 5.77 ± 1.22, than in those receiving treatment, at 6.39 ± 1.51. It is suggested that the use of food additives might increase the prevalence of resistance to antibiotics in L. monocytogenes, although additional studies would be necessary to verify this finding by analyzing a higher number of samples and different foodstuffs and by increasing the number of antimicrobial compounds and concentrations to be tested.
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Affiliation(s)
- Cristina Rodríguez-Melcón
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, E-24071 León, Spain
- Institute of Food Science and Technology, University of León, E-24071 León, Spain
| | - Alexandra Esteves
- Department of Veterinary Sciences, School of Agrarian and Veterinary Sciences, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Javier Carballo
- Area of Food Technology, Faculty of Sciences, University of Vigo, E-32004 Ourense, Spain
| | - Carlos Alonso-Calleja
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, E-24071 León, Spain
- Institute of Food Science and Technology, University of León, E-24071 León, Spain
| | - Rosa Capita
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, E-24071 León, Spain
- Institute of Food Science and Technology, University of León, E-24071 León, Spain
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Madad A, Marshall KE, Blessington T, Hardy C, Salter M, Basler C, Conrad A, Stroika S, Luo Y, Dwarka A, Gerhardt T, Rosa Y, Cibulskas K, Rosen HE, Adcock B, Kiang D, Hutton S, Parish M, Podoski B, Patel B, Viazis S. Investigation of a Multistate Outbreak of Listeria monocytogenes Infections Linked to Frozen Vegetables Produced at Individually Quick-Frozen Vegetable Manufacturing Facilities. J Food Prot 2023; 86:100117. [PMID: 37327999 PMCID: PMC10829048 DOI: 10.1016/j.jfp.2023.100117] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 06/01/2023] [Accepted: 06/10/2023] [Indexed: 06/18/2023]
Abstract
In 2016, the U.S. Food and Drug Administration (FDA), the Centers for Disease Control and Prevention (CDC), and state partners investigated nine Listeria monocytogenes infections linked to frozen vegetables. The investigation began with two environmental L. monocytogenes isolates recovered from Manufacturer A, primarily a processor of frozen onions, that were a match by whole genome sequencing (WGS) to eight clinical isolates and historical onion isolates with limited collection details. Epidemiologic information, product distribution, and laboratory evidence linked suspect food items, including products sourced from Manufacturer B, also a manufacturer of frozen vegetable/fruit products, with an additional illness. The environmental isolates were obtained during investigations at Manufacturers A and B. State and federal partners interviewed ill people, analyzed shopper card data, and collected household and retail samples. Nine ill persons between 2013 and 2016 were reported in four states. Of four ill people with information available, frozen vegetable consumption was reported by three, with shopper cards confirming purchases of Manufacturer B brands. Two identified outbreak strains of L. monocytogenes (Outbreak Strain 1 and Outbreak Strain 2) were a match to environmental isolates from Manufacturer A and/or isolates from frozen vegetables recovered from open and unopened product samples sourced from Manufacturer B; the investigation resulted in extensive voluntary recalls. The close genetic relationship between isolates helped investigators determine the source of the outbreak and take steps to protect public health. This is the first known multistate outbreak of listeriosis in the United States linked to frozen vegetables and highlights the significance of sampling and WGS analyses when there is limited epidemiologic information. Additionally, this investigation emphasizes the need for further research regarding food safety risks associated with frozen foods.
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Affiliation(s)
- Asma Madad
- Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA.
| | | | - Tyann Blessington
- Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA
| | - Cerisé Hardy
- Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA
| | - Monique Salter
- Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA
| | - Colin Basler
- Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Amanda Conrad
- Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Steven Stroika
- Centers for Disease Control and Prevention, Atlanta, GA 30329, USA
| | - Yan Luo
- Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA
| | - Asha Dwarka
- Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA
| | - Terri Gerhardt
- Ohio Department of Agriculture, Reynoldsburg, OH 43068, USA
| | - Yamir Rosa
- Ohio Department of Agriculture Consumer Protection Laboratory, Reynoldsburg, OH 43068, USA
| | | | - Hilary E Rosen
- California Department of Public Health, Los Angeles, CA 90013, USA
| | - Brandon Adcock
- Food and Drug Branch, California Department of Public Health, Sacramento, CA 95814, USA
| | - David Kiang
- Food and Drug Laboratory Branch, California Department of Public Health, Richmond, CA 94804, USA
| | - Scott Hutton
- Idaho Department of Health and Welfare, Boise, ID 83720, USA
| | - Mickey Parish
- Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA
| | - Brett Podoski
- Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA
| | - Bhavini Patel
- Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA
| | - Stelios Viazis
- Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740, USA
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Treatment of Ready-To-Eat Cooked Meat Products with Cold Atmospheric Plasma to Inactivate Listeria and Escherichia coli. Foods 2023; 12:foods12040685. [PMID: 36832760 PMCID: PMC9955718 DOI: 10.3390/foods12040685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/24/2023] [Accepted: 01/28/2023] [Indexed: 02/09/2023] Open
Abstract
Ready-to-eat meat products have been identified as a potential vehicle for Listeria monocytogenes. Postprocessing contamination (i.e., handling during portioning and packaging) can occur, and subsequent cold storage together with a demand for products with long shelf life can create a hazardous scenario. Good hygienic practice is augmented by intervention measures in controlling post-processing contamination. Among these interventions, the application of 'cold atmospheric plasma' (CAP) has gained interest. The reactive plasma species exert some antibacterial effect, but can also alter the food matrix. We studied the effect of CAP generated from air in a surface barrier discharge system (power densities 0.48 and 0.67 W/cm2) with an electrode-sample distance of 15 mm on sliced, cured, cooked ham and sausage (two brands each), veal pie, and calf liver pâté. Colour of samples was tested immediately before and after CAP exposure. CAP exposure for 5 min effectuated only minor colour changes (ΔE max. 2.7), due to a decrease in redness (a*), and in some cases, an increase in b*. A second set of samples was contaminated with Listeria (L.) monocytogenes, L. innocua and E. coli and then exposed to CAP for 5 min. In cooked cured meats, CAP was more effective in inactivating E. coli (1 to 3 log cycles) than Listeria (from 0.2 to max. 1.5 log cycles). In (non-cured) veal pie and calf liver pâté that had been stored 24 h after CAP exposure, numbers of E. coli were not significantly reduced. Levels of Listeria were significantly reduced in veal pie that had been stored for 24 h (at a level of ca. 0.5 log cycles), but not in calf liver pâté. Antibacterial activity differed between but also within sample types, which requires further studies.
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Virulence Characteristics and Distribution of the Pathogen Listeria ivanovii in the Environment and in Food. Microorganisms 2022; 10:microorganisms10081679. [PMID: 36014096 PMCID: PMC9414773 DOI: 10.3390/microorganisms10081679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/10/2022] [Accepted: 08/18/2022] [Indexed: 11/17/2022] Open
Abstract
Listeria ivanovii and L. monocytogenes, are the only pathogenic species of the genus Listeria and share many virulence factors and mechanisms of pathogenicity. L. ivanovii shows host tropism towards small ruminants and rodents and much lower virulence for humans compared to L. monocytogenes. However, severe infections caused by L. ivanovii, resulting in bacteremia, abortion and stillbirth, occasionally occurred in immunocompromised persons and in pregnant women, while in immunocompetent hosts L. ivanovii can cause gastroenteritis. In this review, the updated knowledge on virulence aspects and distribution of L. ivanovii in the environment and in food is summarized. Recent research on its virulence characters at genome level gave indications on how pathogenicity evolved in this bacterial species. As for L. monocytogenes, L. ivanovii infections occurred after the ingestion of contaminated food, so an overview of reports regarding its distribution in food products was carried out to obtain indications on the categories of foods exposed to contamination by L. ivanovii. It was found that a wide variety of food products can be a source of this microorganism and that, like L. monocytogenes, L. ivanovii is able to persist in the food production environment. Studies on its ability to grow in enrichment and isolation media suggested that its occurrence in nature might be underestimated. Moreover, virulence varies among strains for differences in virulence character regulation, presence/absence of genetic regions and the possible instability of a Listeria pathogenicity genomic island, LIPI-2, which is unique to L. ivanovii. We can conclude that L. ivanovii, as a possible pathogen for animals and humans, requires more focused investigations regarding its occurrence in the environment and in food and on intra-species variability of pathogenic potential.
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Gana J, Gcebe N, Pierneef R, Moerane R, Adesiyun AA. Multiple-Locus Variable-Number Tandem Repeat Analysis Genotypes of Listeria monocytogenes Isolated from Farms, Abattoirs, and Retail in Gauteng Province, South Africa. J Food Prot 2022; 85:1249-1257. [PMID: 35588459 DOI: 10.4315/jfp-22-081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 04/29/2022] [Indexed: 11/11/2022]
Abstract
ABSTRACT The use of multiple-locus variable-number analysis (MLVA) of tandem repeats (TRs) for subtyping Listeria monocytogenes has proven to be reliable and fast. This study determined the MLVA genotypes of 60 isolates of L. monocytogenes recovered from cattle farms, abattoirs, and retail outlets in Gauteng province, South Africa. The distribution of the 60 L. monocytogenes isolates analyzed by type of sample was as follows: raw beef (28, 46.7%), ready-to-eat beef products (9, 15.0%), beef carcass swabs (9, 15.0%), cattle environment (6, 10.0%), and cattle feces (8, 13.3%). The serogroups of the isolates were determined using PCR and the MLVA genotypes based on six selected loci. The frequency of the 60 serogroups detected was as follows: 1/2a-3a (IIa) (27, 45.0%); 4b-4d-4e (1Vb) (24, 40.0%); 1/2c-3c (IIc) (8, 13.3%); and 1/2b-3b (IIb) (1, 1.7%). MLVA successfully clustered genetically related isolates and differentiated nonrelated isolates, irrespective of their sources, sample types, and serogroups, as demonstrated by 16 MLVA pattern types detected. For serogroup 4b-4d-4e (IVb), there was no variation in TRs LM-TR2, LM-TR4, and LM-TR6, which each contained only one allele (02, 00, and 93, respectively). However, across the sources and sample types of isolates, there was variation in serogroup 4b-4d-4e (IVb): LM-TR1 contained 00, 03, and 05; LM-TR3 contained 14, 20, and 22; and LM-TR5 contained 14, 21, and 25. Similar patterns of variation in the TRs were detected in the other serogroups (1/2a-3a, 1/2b-3b, and 1/2c-3c). BioNumeric data analysis identified at least five types in Gauteng province. MLVA epidemiologically clustered the related isolates and differentiated unrelated isolates. HIGHLIGHTS
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Affiliation(s)
- James Gana
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa.,Department of Agricultural Education, Federal College of Education, Kontagora, Niger State, Nigeria
| | - Nomakorinte Gcebe
- Bacteriology Department, Onderstepoort Veterinary Research, Agricultural Research Council, South Africa
| | - Rian Pierneef
- Agricultural Research Council-Biotechnology Platform, 100 Old Soutpan Road, Onderstepoort, Pretoria 0110, South Africa
| | - Rebone Moerane
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Abiodun A Adesiyun
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa.,Department of Paraclinical Sciences, School of Veterinary Medicine, The University of West Indies, St. Augustine, Trinidad and Tobago
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Mao Y, Cui X, Wang H, Qin X, Liu Y, Yin Y, Su X, Tang J, Wang F, Ma F, Duan N, Zhang D, Hu Y, Wang W, Wei S, Chen X, Mao Z, Chen X, Shen X. De novo assembly provides new insights into the evolution of Elaeagnus angustifolia L. PLANT METHODS 2022; 18:84. [PMID: 35717244 PMCID: PMC9206267 DOI: 10.1186/s13007-022-00915-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 05/26/2022] [Indexed: 05/04/2023]
Abstract
BACKGROUND Elaeagnus angustifolia L. is a deciduous tree in the family Elaeagnaceae. It is widely used to study abiotic stress tolerance in plants and to improve desertification-affected land because of its ability to withstand diverse types of environmental stress, such as drought, salt, cold, and wind. However, no studies have examined the mechanisms underlying the resistance of E. angustifolia to environmental stress and its adaptive evolution. METHODS Here, we used PacBio, Hi-C, resequencing, and RNA-seq to construct the genome and transcriptome of E. angustifolia and explore its adaptive evolution. RESULTS The reconstructed genome of E. angustifolia was 526.80 Mb, with a contig N50 of 12.60 Mb and estimated divergence time of 84.24 Mya. Gene family expansion and resequencing analyses showed that the evolution of E. angustifolia was closely related to environmental conditions. After exposure to salt stress, GO pathway analysis showed that new genes identified from the transcriptome were related to ATP-binding, metal ion binding, and nucleic acid binding. CONCLUSION The genome sequence of E. angustifolia could be used for comparative genomic analyses of Elaeagnaceae family members and could help elucidate the mechanisms underlying the response of E. angustifolia to drought, salt, cold, and wind stress. Generally, these results provide new insights that could be used to improve desertification-affected land.
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Affiliation(s)
- Yunfei Mao
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Xueli Cui
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Haiyan Wang
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Xin Qin
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Yangbo Liu
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Yijun Yin
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Xiafei Su
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Juan Tang
- Biomarker Technologies Corporation, Beijing, China
| | | | - Fengwang Ma
- College of Horticulture, Northwest Agriculture and Forestry University, Yangling, China
| | - Naibin Duan
- Germplasm Resource Center of Shandong Province, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Donglin Zhang
- Department of Horticulture, University of Georgia, Athens, USA
| | - Yanli Hu
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Wenli Wang
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Shaochong Wei
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Xiaoliu Chen
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Zhiquan Mao
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Xuesen Chen
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China
| | - Xiang Shen
- College of Horticultural Science and Engineering/State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China.
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Tanui CK, Benefo EO, Karanth S, Pradhan AK. A Machine Learning Model for Food Source Attribution of Listeria monocytogenes. Pathogens 2022; 11:pathogens11060691. [PMID: 35745545 PMCID: PMC9230378 DOI: 10.3390/pathogens11060691] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 06/06/2022] [Accepted: 06/10/2022] [Indexed: 12/07/2022] Open
Abstract
Despite its low morbidity, listeriosis has a high mortality rate due to the severity of its clinical manifestations. The source of human listeriosis is often unclear. In this study, we investigate the ability of machine learning to predict the food source from which clinical Listeria monocytogenes isolates originated. Four machine learning classification algorithms were trained on core genome multilocus sequence typing data of 1212 L. monocytogenes isolates from various food sources. The average accuracies of random forest, support vector machine radial kernel, stochastic gradient boosting, and logit boost were found to be 0.72, 0.61, 0.7, and 0.73, respectively. Logit boost showed the best performance and was used in model testing on 154 L. monocytogenes clinical isolates. The model attributed 17.5 % of human clinical cases to dairy, 32.5% to fruits, 14.3% to leafy greens, 9.7% to meat, 4.6% to poultry, and 18.8% to vegetables. The final model also provided us with genetic features that were predictive of specific sources. Thus, this combination of genomic data and machine learning-based models can greatly enhance our ability to track L. monocytogenes from different food sources.
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Affiliation(s)
- Collins K. Tanui
- Department of Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA; (C.K.T.); (E.O.B.); (S.K.)
- Center for Food Safety and Security Systems, University of Maryland, College Park, MD 20742, USA
| | - Edmund O. Benefo
- Department of Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA; (C.K.T.); (E.O.B.); (S.K.)
| | - Shraddha Karanth
- Department of Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA; (C.K.T.); (E.O.B.); (S.K.)
| | - Abani K. Pradhan
- Department of Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA; (C.K.T.); (E.O.B.); (S.K.)
- Center for Food Safety and Security Systems, University of Maryland, College Park, MD 20742, USA
- Correspondence:
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11
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Prevalence, quantification and antibiotic resistance of Listeria monocytogenes in poultry preparations. Food Control 2022. [DOI: 10.1016/j.foodcont.2021.108608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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12
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Antibiotic Resistance Patterns of Listeria Species Isolated from Broiler Abattoirs in Lusaka, Zambia. Antibiotics (Basel) 2022; 11:antibiotics11050591. [PMID: 35625235 PMCID: PMC9137566 DOI: 10.3390/antibiotics11050591] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/16/2022] [Accepted: 04/25/2022] [Indexed: 02/04/2023] Open
Abstract
L. monocytogenes is a public health threat linked to fast foods such as broiler chickens. This study aimed to verify the occurrence of Listeria species in chickens from abattoirs and evaluate their antimicrobial resistance. In total, 150 broiler carcass swabs distributed as cloacal (n = 60), exterior surface (n = 60), and environmental (n = 30) were collected. Listeria species were characterized using biochemical tests and PCR. We conducted antibiotic resistance tests using the disc diffusion and Etest (Biomerieux, Durham, NC, USA) methods. Overall isolation of Listeria species was 15% (23/150) 95% CI (10.16–22.33), 2% (3/150) 95% CI (0.52–6.19) and 13% (20/150) 95% CI (8.53–20.08) came from environmental swabs and carcass swabs, respectively. Proportions of positive Listeria isolates were L. monocytogenes 74% (17/23), L. welshimeri 22% (5/23), and L. innocua 4% (1/23). Listeria species from the exterior carcass swabs was 61% (14/23), cloacal swabs 26% (6/23), and environmental swabs 3% (3/23). L. monocytogenes had the greatest resistance percentage to the following antibiotics: clindamycin (61%, 10/23), tetracycline 30% (7/23), and erythromycin 13%, (3/23). Isolation of L. monocytogenes in relatively high numbers, including the antimicrobial profiles, suggests a potential risk of the pathogen remaining viable in the food continuum and a public health risk to would-be consumers.
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Kayode AJ, Okoh AI. Incidence and genetic diversity of multi-drug resistant Listeria monocytogenes isolates recovered from fruits and vegetables in the Eastern Cape Province, South Africa. Int J Food Microbiol 2021; 363:109513. [PMID: 34971880 DOI: 10.1016/j.ijfoodmicro.2021.109513] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 12/02/2021] [Accepted: 12/19/2021] [Indexed: 11/24/2022]
Abstract
We investigated the prevalence, genetic diversity and antibiogram profiles of Listeria monocytogenes (Lm) recovered from fruits and vegetables sourced from three District Municipalities in the Eastern Cape Province, South Africa after the recent listeriosis outbreak in the country. The procedure outlined by the International Organization for Standardization EN ISO 11290:2017 Parts 1 and 2 was adopted for the isolation of Lm from 140 vegetable samples. Molecular detection of the pathogen and the presence of 10 virulence-associated markers were assessed. Lm was detected in 42.86% of all the vegetable samples tested. Highest prevalence was recorded in tomato (65.52%) followed by spinach (56.67%), cabbage (38.10%), apple (36.84%), mushroom (29.41%) and carrot (10%). The virulence determinants including the inlA, inlC, prfA and plcA, hly, plcB genes were detected in all Lm isolates whereas, inlJ (88.35%), inlB (86.41%), mpl (92.23%) and actA (84.55%) respectively. High susceptibility (> 50) was observed to all antibiotics tested except for sulfamethoxazole (17.48%), streptomycin (38.84%), amoxicillin (41.75%) and erythromycin (43.69%). However, high resistance against sulfamethoxazole (80.58%), amoxicillin (58.25%) and erythromycin (49.52%) were observed. About 85.44% of Lm isolates showed multidrug-resistance phenotypes against the test antibiotics. Furthermore, twenty (20) resistance genes encoding tetracyclines, sulphonamides, phenicols, aminoglycosides, β-lactamases, and variants of the extended-spectrum of β-lactamases (ESBLs) resistance were detected among the Lm isolates. The sul2 (90.81), tetM (68.42%) sul1 (45.98%) were more prevalent among the resistant strains. The dendrogram signatures generating seven clades is an indication of the high genetic diversity among the isolates. We conclude that the presence of Lm in fruits and vegetables is a potential threat to the consumers and a potential public health hazard, particularly to the high-risk group of the population.
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Affiliation(s)
- Adeoye John Kayode
- SAMRC Microbial Water Quality Monitoring Center, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa; Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa.
| | - Anthony Ifeanyi Okoh
- Department of Environmental Health Sciences, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates; SAMRC Microbial Water Quality Monitoring Center, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa; Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa
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Papatzimos G, Kotzamanidis C, Kyritsi M, Malissiova E, Economou V, Giantzi V, Zdragas A, Hadjichristodoulou C, Sergelidis D. Prevalence and characteristics of Listeria monocytogenes in meat, meat products, food handlers and the environment of the meat processing and the retail facilities of a company in Northern Greece. Lett Appl Microbiol 2021; 74:367-376. [PMID: 34850423 DOI: 10.1111/lam.13620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 11/16/2021] [Accepted: 11/23/2021] [Indexed: 01/17/2023]
Abstract
In this study, we investigated the incidence of Listeria monocytogenes in the receiving meat, the meat products, the personnel and the environment of a vertically integrated company in Northern Greece owing a processing plant and three trading facilities. A total of 303 samples were examined from the receiving raw meat, raw meat preparations, ready-to-eat meat products, processing surfaces and the environment of these facilities as well as the food handlers' hands and nasal cavities. MALDI-TOF MS was used for Listeria identification; from the 22 (7·26%) positive to Listeria spp. isolates, 12 (3·96%) identified as L. monocytogenes, eight (2·64%) as Listeria innocua and two (0·66%) as Listeria welshimeri. Molecular serotyping of L. monocytogenes isolates by multiplex PCR revealed 11 strains belonging to serogroup IIa (1/2a and 3a) and one to IIc (1/2c and 3c). The assay for the detection of the virulence-associated genes revealed eight isolates carrying all the examined genes (inlA, inlB, inlC, plcA, prfA, actA, hlyA and iap) and four carrying all except the actA gene. Eleven (91·7%) of the isolates showed a strong ability to form biofilm. All isolates were multidrug resistant. The MALDI-TOF Main Spectrum Profile (MSPs), revealed three clusters: one with five isolates (four from environmental samples and one from a food handler), one with five isolates (all from environmental samples) and one with two isolates (both from raw meat products). MALDI-TOF MS seems to be a reliable tool for the identification of niches and contamination routes in processing plants, contributing also to the evaluation and improvement of the applied preventive measures to control L. monocytogenes.
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Affiliation(s)
- G Papatzimos
- Laboratory of Hygiene of Foods of Animal Origin - Veterinary Public Health, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - C Kotzamanidis
- Hellenic Agricultural Organization-DIMITRA, Veterinary Research Institute of Thessaloniki, Thermi, Greece
| | - M Kyritsi
- Laboratory of Hygiene and Epidemiology, Medical School, University of Thessaly, Larissa, Greece
| | - E Malissiova
- Food of Animal Origin Laboratory, Animal Science Department, University of Thessaly, Larisa, Greece
| | - V Economou
- Laboratory of Hygiene of Foods of Animal Origin - Veterinary Public Health, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - V Giantzi
- Hellenic Agricultural Organization-DIMITRA, Veterinary Research Institute of Thessaloniki, Thermi, Greece
| | - A Zdragas
- Hellenic Agricultural Organization-DIMITRA, Veterinary Research Institute of Thessaloniki, Thermi, Greece
| | - C Hadjichristodoulou
- Laboratory of Hygiene and Epidemiology, Medical School, University of Thessaly, Larissa, Greece
| | - D Sergelidis
- Laboratory of Hygiene of Foods of Animal Origin - Veterinary Public Health, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Diriba K, Awulachew E, Diribsa K. The prevalence of Listeria species in different food items of animal and plant origin in Ethiopia: a systematic review and meta-analysis. Eur J Med Res 2021; 26:60. [PMID: 34167579 PMCID: PMC8223351 DOI: 10.1186/s40001-021-00532-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 06/14/2021] [Indexed: 11/30/2022] Open
Abstract
Background Listeriosis is one of the important emerging zoonotic disease affecting human health following the consumption of contaminated food of animal origin. It results in serious clinical complications in humans with a high case facility rate. Therefore, this systematic review and meta-analysis aimed to estimate the pooled prevalence of Listeria species in Ethiopia. Methods A systematic search was conducted on PubMed, Web of Science, EMBASE, Google Scholar and the Cochrane Library. All identified observational studies reporting the prevalence of Listeria species in different food items of animal and plant origin in Ethiopia were included. Three authors independently extracted data and analyzed them using STATA Version 13 statistical software. A random effects model was computed to estimate the pooled prevalence of Listeria species in Ethiopia. Results After reviewing 122 studies, five studies fulfilled the inclusion criteria were included in the meta-analysis. The findings from the five studies revealed that the pooled prevalence of Listeria species in different food items of animal and plant origin in Ethiopia was 27% (95% CI 25, 29). The highest prevalence of Listeria species was reported in beef meat followed by ice cream with prevalence rates of 62% (95% CI 50, 75) and 43% (95% CI 33, 53), respectively. Conclusion The presence of Listeria species in different food items of animal and plant origin in Ethiopia is an indicator of the presence of public health hazards to the consumer, particularly to the high-risk groups. Hence, awareness creation on food safety and implementation of regulations is strongly recommended.
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Affiliation(s)
- Kuma Diriba
- Department of Medical Laboratory Sciences, Health Science and Medical College, Dilla University, Dilla, Ethiopia.
| | - Ephrem Awulachew
- Department of Medical Laboratory Sciences, Health Science and Medical College, Dilla University, Dilla, Ethiopia
| | - Kuma Diribsa
- Department of Biology, Educational College, Dilla University, Dilla, Ethiopia
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Gebremedhin EZ, Hirpa G, Borana BM, Sarba EJ, Marami LM, Kelbesa KA, Tadese ND, Ambecha HA. Listeria Species Occurrence and Associated Factors and Antibiogram of Listeria monocytogenes in Beef at Abattoirs, Butchers, and Restaurants in Ambo and Holeta in Ethiopia. Infect Drug Resist 2021; 14:1493-1504. [PMID: 33907427 PMCID: PMC8064612 DOI: 10.2147/idr.s304871] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 03/31/2021] [Indexed: 11/24/2022] Open
Abstract
PURPOSE Listeriosis is one of the globally distributed foodborne diseases with the highest fatality rate. The objectives of this study were to isolate and identify Listeria species, assess factors for contamination of beef, and antibiogram of Listeria monocytogenes in Ambo and Holeta towns, Central Ethiopia. MATERIALS AND METHODS A total of 450 meat samples were collected from abattoirs (n=150), butchers (n=150), and restaurants (n=150) for isolation and identification of Listeria species. Logistic regression analysis was used to assess the association between the occurrence of Listeria species in meat and potential risk factors. The antimicrobial susceptibility test was done using the Kirby Bauer test. RESULTS The overall occurrence of Listeria species in Ambo and Holeta towns was 28.4% (128/450; 95% confidence interval [CI]: 24.3-32.9%). The isolation rate of Listeria monocytogenes was 4.4%, Listeria ivanovii 2.2%, Listeria seeligeri 1.8%, Listeria welshimeri 3.8%, Listeria innocua 6.2%, and Listeria grayi 10.2%. The probability of contamination of meat in butchers and restaurants was higher in Holeta than Ambo [OR=3.4; 95%; p=0.001], in dry than wet season [OR=5.2; p=0.009], and where the hygiene of cutting boards was poor (OR=7.7; p=0.008). Of the 20 Listeria monocytogenes isolates, 80%, 70%, 60%, and 55% were resistant to oxacillin, amikacin, and nalidixic acid, chloramphenicol, and tetracycline, respectively. The Listeria monocytogenes isolates were 95%, 90%, and 85% susceptible to amoxicillin, vancomycin, and clindamycin, respectively. About 95% of Listeria monocytogenes isolates were multidrug-resistant. One isolate (5%) had developed resistance to 10 classes of antimicrobial drugs. CONCLUSION Listeria species are widespread and study towns, season, and hygiene of cutting boards are independent predictors of isolation of Listeria species. Multidrug resistance among Listeria monocytogenes was very high. Therefore, adequate cooking of meat, regular training of beef handlers, prudent use of drugs, and further molecular studies on Listeria species are important.
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Affiliation(s)
- Endrias Zewdu Gebremedhin
- Department of Veterinary Sciences, College of Agriculture and Veterinary Science, Ambo University, Ambo, Ethiopia
| | - Gadisa Hirpa
- Department of Biology, Ambo Preparatory School, Ambo, Ethiopia
| | - Bizunesh Mideksa Borana
- Department of Veterinary Sciences, College of Agriculture and Veterinary Science, Ambo University, Ambo, Ethiopia
| | - Edilu Jorga Sarba
- Department of Veterinary Sciences, College of Agriculture and Veterinary Science, Ambo University, Ambo, Ethiopia
| | - Lencho Megersa Marami
- Department of Veterinary Laboratory Technology, College of Agriculture and Veterinary Science, Ambo University, Ambo, Ethiopia
| | - Kebede Abdisa Kelbesa
- Department of Veterinary Sciences, College of Agriculture and Veterinary Science, Ambo University, Ambo, Ethiopia
| | - Nega Desalegn Tadese
- Department of Veterinary Laboratory Technology, College of Agriculture and Veterinary Science, Ambo University, Ambo, Ethiopia
| | - Hirut Abebe Ambecha
- Department of Veterinary Laboratory Technology, College of Agriculture and Veterinary Science, Ambo University, Ambo, Ethiopia
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Jarvis KG, Hsu CK, Pettengill JB, Ihrie J, Karathia H, Hasan NA, Grim CJ. Microbiome Population Dynamics of Cold-Smoked Sockeye Salmon during Refrigerated Storage and after Culture Enrichment. J Food Prot 2021; 85:238-253. [PMID: 34614175 DOI: 10.4315/jfp-21-228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 10/05/2021] [Indexed: 11/11/2022]
Abstract
ABSTRACT Cold-smoked salmon is a ready-to-eat seafood product of high commercial importance. The processing and storage steps facilitate the introduction, growth, and persistence of foodborne pathogens and spoilage bacteria. The growth of commensal bacteria during storage and once the product is opened also influence the quality and safety of cold-smoked salmon. Here we investigated the microbial community through targeted 16S rRNA gene and shotgun metagenomic sequencing as means to better understand the interactions among bacteria in cold-smoked salmon. Cold-smoked salmon samples were tested over 30 days of aerobic storage at 4°C and cultured at each time point in a buffered Listeria enrichment broth (BLEB) commonly used to detect Listeria in foods. The microbiomes were composed of Firmicutes and Proteobacteria, namely, Carnobacterium, Brochothrix, Pseudomonas, Serratia, and Psychrobacter. Pseudomonas species were the most diverse species, with 181 taxa identified. In addition, we identified potential homologs to 10 classes of bacteriocins in microbiomes of cold-smoked salmon stored at 4°C and corresponding BLEB culture enrichments. The findings presented here contribute to our understanding of microbiome population dynamics in cold-smoked salmon, including changes in bacterial taxa during aerobic cold storage and after culture enrichment. This may facilitate improvements to pathogen detection and quality preservation of this food. HIGHLIGHTS
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Affiliation(s)
- Karen G Jarvis
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, Laurel, Maryland 20708
| | - Chiun-Kang Hsu
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, Laurel, Maryland 20708
| | - James B Pettengill
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, Maryland 20742
| | - John Ihrie
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, Maryland 20742
| | - Hiren Karathia
- Cancer Data Science Laboratory, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892
| | - Nur A Hasan
- Center for Bioinformatics and Computational Biology, University of Maryland, College Park, Maryland 20742, USA
| | - Christopher J Grim
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, Laurel, Maryland 20708
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Maćkiw E, Korsak D, Kowalska J, Felix B, Stasiak M, Kucharek K, Postupolski J. Incidence and genetic variability of Listeria monocytogenes isolated from vegetables in Poland. Int J Food Microbiol 2020; 339:109023. [PMID: 33341686 DOI: 10.1016/j.ijfoodmicro.2020.109023] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 12/08/2020] [Accepted: 12/09/2020] [Indexed: 02/07/2023]
Abstract
The aim of the present study is to investigate the prevalence and genetic diversity of Listeria monocytogenes in various fresh and frozen vegetable products available in Poland. The samples were collected at retail market within the framework of national official control and monitoring program. In the years 2016-2019 a total of 49 samples out of 8712 collected vegetable samples were positive for L. monocytogenes. Our findings demonstrated that the occurrence of L. monocytogenes in various vegetable products was generally low, on average only 0.56% in the studied years. All isolates were susceptible to 11 antimicrobial agents: penicillin, ampicillin, meropenem, erythromycin, sulfamethoxazole-trimethoprim, amoxicillin-clavulanic acid, ciprofloxacin, chloramphenicol, gentamicin, vancomycin, and tetracycline. All of them harbored virulence-associated genes (inlA, inlC, and lmo2672), 82% harbored inlJ gene and few of them (22%) also possessed the llsX gene. The majority of collected isolates (65%) belonged to molecular serogroup 1/2a-3a, followed by 4ab-4b-4d-4e (33%), and only one to serogroup 1/2b-3b-7 (2%). Isolates yielded 18 different restriction profiles, revealing a large cluster of contamination linked to frozen corn (21 strains) and distributed in 3 pulsotypes. MLST analysis classified selected isolates into nine clonal complexes (CCs). The obtained results contribute to characterizing the diversity of L. monocytogenes isolated from various vegetable products in Poland and their impact on food safety and public health.
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Affiliation(s)
- Elżbieta Maćkiw
- Department of Food Safety, National Institute of Public Health - National Institute of Hygiene, Warsaw, Poland.
| | - Dorota Korsak
- Department of Food Safety, National Institute of Public Health - National Institute of Hygiene, Warsaw, Poland
| | - Joanna Kowalska
- Department of Food Safety, National Institute of Public Health - National Institute of Hygiene, Warsaw, Poland
| | - Benjamin Felix
- European Union Reference Laboratory for L. monocytogenes, ANSES, Laboratory for Food Safety, University of Paris-Est, 94700 Maisons-Alfort, France
| | - Monika Stasiak
- Department of Food Safety, National Institute of Public Health - National Institute of Hygiene, Warsaw, Poland
| | - Katarzyna Kucharek
- Department of Food Safety, National Institute of Public Health - National Institute of Hygiene, Warsaw, Poland
| | - Jacek Postupolski
- Department of Food Safety, National Institute of Public Health - National Institute of Hygiene, Warsaw, Poland
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Willis C, McLauchlin J, Aird H, Amar C, Barker C, Dallman T, Elviss N, Lai S, Sadler-Reeves L. Occurrence of Listeria and Escherichia coli in frozen fruit and vegetables collected from retail and catering premises in England 2018–2019. Int J Food Microbiol 2020; 334:108849. [DOI: 10.1016/j.ijfoodmicro.2020.108849] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 08/18/2020] [Accepted: 08/19/2020] [Indexed: 10/23/2022]
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20
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Georgalis L, Garre A, Fernandez Escamez PS. Training in tools to develop Quantitative Risk Assessment using Spanish ready-to-eat food examples. EFSA J 2020; 18:e181103. [PMID: 33294042 PMCID: PMC7691611 DOI: 10.2903/j.efsa.2020.e181103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Unsafe food poses global health threats, potentially endangering consumers. The great majority of people will experience a food-borne disease at some point in their lives. Ready-to-eat (RTE) food is the one intended by the producer or the manufacturer for direct human consumption without the need for cooking or other processing effective to eliminate or reduce the concentration of pathogenic microorganisms. Prepared foods are often complex and may contain multiple components that make them vulnerable for growth of pathogenic microorganisms. Among all the pathogenic microorganisms that may be present in RTE foods, Listeria monocytogenes is of special interest because it is the causative agent of listeriosis and it has the ability to survive and replicate at refrigeration and low pH conditions. We performed a quantitative microbial risk assessment (QMRA) in RTE dry-fermented sausage to measure the risk of listeriosis associated to the consumption of this product. The starting point of our investigation was the storage at the factory, after the end-product was produced and before distribution to retail. The stochastic model was implemented in MicroHibro, an online tool for QMRA. Because L. monocytogenes concentration and prevalence can vary greatly between different studies and different types of fermented sausages, we tested different scenarios to show the importance of low prevalence and concentration of the pathogen at the final product. Our results show that the risk estimates are very sensitive to the modelling hypotheses used to describe this process. Therefore, the development of accurate probabilistic models describing the initial concentration of L. monocytogenes shall largely reduce the uncertainty associated to the QMRA of listeriosis in this type of product.
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Matle I, Mbatha KR, Madoroba E. A review of Listeria monocytogenes from meat and meat products: Epidemiology, virulence factors, antimicrobial resistance and diagnosis. ACTA ACUST UNITED AC 2020; 87:e1-e20. [PMID: 33054262 PMCID: PMC7565150 DOI: 10.4102/ojvr.v87i1.1869] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 08/03/2020] [Accepted: 08/04/2020] [Indexed: 12/13/2022]
Abstract
Listeria monocytogenes is a zoonotic food-borne pathogen that is associated with serious public health and economic implications. In animals, L. monocytogenes can be associated with clinical listeriosis, which is characterised by symptoms such as abortion, encephalitis and septicaemia. In human beings, listeriosis symptoms include encephalitis, septicaemia and meningitis. In addition, listeriosis may cause gastroenteric symptoms in human beings and still births or spontaneous abortions in pregnant women. In the last few years, a number of reported outbreaks and sporadic cases associated with consumption of contaminated meat and meat products with L. monocytogenes have increased in developing countries. A variety of virulence factors play a role in the pathogenicity of L. monocytogenes. This zoonotic pathogen can be diagnosed using both classical microbiological techniques and molecular-based methods. There is limited information about L. monocytogenes recovered from meat and meat products in African countries. This review strives to: (1) provide information on prevalence and control measures of L. monocytogenes along the meat value chain, (2) describe the epidemiology of L. monocytogenes (3) provide an overview of different methods for detection and typing of L. monocytogenes for epidemiological, regulatory and trading purposes and (4) discuss the pathogenicity, virulence traits and antimicrobial resistance profiles of L. monocytogenes.
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Affiliation(s)
- Itumeleng Matle
- Bacteriology Division, Agricultural Research Council - Onderstepoort Veterinary Research, Onderstepoort, Pretoria, South Africa; and, Department of Agriculture and Animal Health, University of South Africa, Science Campus, Florida.
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Obaidat MM, Kiryluk H, Rivera A, Stringer AP. Molecular serogrouping and virulence of Listeria monocytogenes from local dairy cattle farms and imported beef in Jordan. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Assessment of the microbiological quality and safety of marinated chicken products from Greek retail outlets. Int J Food Microbiol 2020; 320:108506. [DOI: 10.1016/j.ijfoodmicro.2019.108506] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 12/30/2019] [Accepted: 12/31/2019] [Indexed: 02/07/2023]
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Koutsoumanis K, Alvarez‐Ordóñez A, Bolton D, Bover‐Cid S, Chemaly M, Davies R, De Cesare A, Herman L, Hilbert F, Lindqvist R, Nauta M, Peixe L, Ru G, Simmons M, Skandamis P, Suffredini E, Jordan K, Sampers I, Wagner M, Da Silva Felicio MT, Georgiadis M, Messens W, Mosbach‐Schulz O, Allende A. The public health risk posed by Listeria monocytogenes in frozen fruit and vegetables including herbs, blanched during processing. EFSA J 2020; 18:e06092. [PMID: 32874300 PMCID: PMC7448082 DOI: 10.2903/j.efsa.2020.6092] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
A multi-country outbreak of Listeria monocytogenes ST6 linked to blanched frozen vegetables (bfV) took place in the EU (2015-2018). Evidence of food-borne outbreaks shows that L. monocytogenes is the most relevant pathogen associated with bfV. The probability of illness per serving of uncooked bfV, for the elderly (65-74 years old) population, is up to 3,600 times greater than cooked bfV and very likely lower than any of the evaluated ready-to-eat food categories. The main factors affecting contamination and growth of L. monocytogenes in bfV during processing are the hygiene of the raw materials and process water; the hygienic conditions of the food processing environment (FPE); and the time/Temperature (t/T) combinations used for storage and processing (e.g. blanching, cooling). Relevant factors after processing are the intrinsic characteristics of the bfV, the t/T combinations used for thawing and storage and subsequent cooking conditions, unless eaten uncooked. Analysis of the possible control options suggests that application of a complete HACCP plan is either not possible or would not further enhance food safety. Instead, specific prerequisite programmes (PRP) and operational PRP activities should be applied such as cleaning and disinfection of the FPE, water control, t/T control and product information and consumer awareness. The occurrence of low levels of L. monocytogenes at the end of the production process (e.g. < 10 CFU/g) would be compatible with the limit of 100 CFU/g at the moment of consumption if any labelling recommendations are strictly followed (i.e. 24 h at 5°C). Under reasonably foreseeable conditions of use (i.e. 48 h at 12°C), L. monocytogenes levels need to be considerably lower (not detected in 25 g). Routine monitoring programmes for L. monocytogenes should be designed following a risk-based approach and regularly revised based on trend analysis, being FPE monitoring a key activity in the frozen vegetable industry.
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Velasco-Hernández A, Saucedo-Veloz C, Ramírez-Guzmán ME, Chávez-Franco SH, Valle-Guadarrama S, Saucedo-Reyes D. Effect of moderate thermal treatments on the inactivation of a strain of Listeria monocytogenes and physicochemical properties of soursop pulp. FOOD SCI TECHNOL INT 2020; 26:535-548. [PMID: 32223432 DOI: 10.1177/1082013220913357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Soursop (Annona muricata L.) is a commercially important tropical fruit, whether fresh or processed as a pasteurized or frozen pulp used to prepare juice, drinks, nectar, ice cream, popsicles, and desserts. Besides preserving quality, another preoccupation in the processing of fruit pulps is product safety. Several studies show the association between pulp processing and the development of various microorganisms; however, few have focused on the association between L. monocytogenes and the pulp of sour fruits. The objective was to evaluate the effect of moderate thermal treatments on the inactivation of L. monocytogenes and the physicochemical properties in soursop pulp in order to determine the best processing conditions that will allow to maintain quality as well as to achieve an adequate level of safety. Thermal inactivation kinetics were obtained for L. monocytogenes inoculated in soursop pulp at five levels of temperature (50, 52.5, 55, 57.5, and 60 ℃) and different exposure times (0-60 min). The survival curves did not suggest a log-linear relationship, and were, consequently, fitted to the modified Gompertz equation. The results indicated that the modified Gompertz equation provided an acceptable goodness of fit. Five-log10 cycles reductions of L. monocytogenes were achieved at 50 ℃/60 min, 52.5 ℃/16 min, 55 ℃/10 min, 57.5 ℃/5 min, and 60 ℃/1.25 min. These 5-log10 treatments applied to the soursop pulp indicated that the soursop pulp showed changes in the color parameters and a decrease in the content of total sugars, reducing sugars, ascorbic acid, total phenols, and pH.
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Nemati V, Khomeiri M, Moayedi A, Sadeghi Mahoonak A, Sadeghi A, Yamchi A. Use of Cuminum Cyminum Essential Oil and Biarum carduchcorum Water Extract on Shelf-life Extension of lambs at Cold Storage. NUTRITION AND FOOD SCIENCES RESEARCH 2019. [DOI: 10.29252/nfsr.6.3.23] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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Kotzamanidis C, Papadopoulos T, Vafeas G, Tsakos P, Giantzi V, Zdragas A. Characterization of Listeria monocytogenes from encephalitis cases of small ruminants from different geographical regions, in Greece. J Appl Microbiol 2019; 126:1373-1382. [PMID: 30835952 DOI: 10.1111/jam.14244] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 02/13/2019] [Accepted: 03/02/2019] [Indexed: 12/19/2022]
Abstract
AIMS The aim of this study was to evaluate the genetic diversity and resistance phenotypes of Listeria monocytogenes strains isolated from clinical encephalitis cases, and compare this population to isolates derived from tank milk of healthy animals. METHODS AND RESULTS A total of 57 L. monocytogenes strains isolated from ruminant's listeriosis cases (n = 31) and from tank milk of healthy ruminants (n = 26) were characterized by species PCR, molecular serotyping, PCR detection of virulence genes, pulsed-field gel electrophoresis and antimicrobial susceptibility testing. All strains possessed inlA, inlC, inlJ, plcA, actA, hlyA and iap virulence-associated genes while serotyping analysis revealed that they were mainly assigned into IVb group. Genotyping revealed 50 pulsotypes among the 57 strains assigned into seven clusters while indistinguishable pulsotypes between clinical and milk strains were not identified. Resistance of L. monocytogenes isolates to 14-16 antimicrobial agents tested was observed and 23 antimicrobial resistance profiles (ARPs) were defined while no apparent predominant ARP type was observed among isolates. CONCLUSIONS Small ruminants are exposed to a broad range of antimicrobial-resistant as well as genetically diverse strains of L. monocytogenes carrying virulence-associated genes but not all of them associated with the disease. Pulsed-field gel electrophoresis analysis suggests that pulsotypes associated with encephalitis are found in farms only in association with listeriosis. SIGNIFICANCE AND IMPACT OF THE STUDY These findings are valuable in understanding the ecology of this important food-borne pathogen and creating awareness for the emerging antimicrobial resistance.
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Affiliation(s)
- C Kotzamanidis
- Hellenic Agricultural Organisation-DEMETER, Veterinary Research Institute of Thessaloniki, Thermi, Greece
| | - T Papadopoulos
- Hellenic Agricultural Organisation-DEMETER, Veterinary Research Institute of Thessaloniki, Thermi, Greece.,Department of Epidemiology and Public Health, Sciensano, Brussels, Belgium
| | - G Vafeas
- Hellenic Agricultural Organisation-DEMETER, Veterinary Research Institute of Thessaloniki, Thermi, Greece
| | - P Tsakos
- Ministry of Rural Development and Food Directorate of Veterinary Centre of Thessaloniki Department of Microbiology, Infectious Diseases and Brucellosis, Thessaloniki, Greece
| | - V Giantzi
- Hellenic Agricultural Organisation-DEMETER, Veterinary Research Institute of Thessaloniki, Thermi, Greece
| | - A Zdragas
- Hellenic Agricultural Organisation-DEMETER, Veterinary Research Institute of Thessaloniki, Thermi, Greece
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Skowron K, Grudlewska K, Lewandowski D, Gajewski P, Reśliński A, Gospodarek-Komkowska E. Antibiotic susceptibility and ability to form biofilm of Listeria monocytogenes strains isolated from frozen vegetables. ACTA ALIMENTARIA 2019. [DOI: 10.1556/066.2019.48.1.8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- K. Skowron
- Department of Microbiology, Faculty of Pharmacy, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, 9 M. Skłodowskiej-Curie Street, 85-094 Bydgoszcz. Poland
| | - K. Grudlewska
- Department of Microbiology, Faculty of Pharmacy, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, 9 M. Skłodowskiej-Curie Street, 85-094 Bydgoszcz. Poland
| | - D. Lewandowski
- Department of Microbiology, Faculty of Pharmacy, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, 9 M. Skłodowskiej-Curie Street, 85-094 Bydgoszcz. Poland
| | - P. Gajewski
- Department of Microbiology, Faculty of Pharmacy, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, 9 M. Skłodowskiej-Curie Street, 85-094 Bydgoszcz. Poland
| | - A. Reśliński
- Department of General Surgery and Transplantology, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, 9 M. Skłodowskiej-Curie Street, 85-094 Bydgoszcz. Poland
| | - E. Gospodarek-Komkowska
- Department of Microbiology, Faculty of Pharmacy, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, 9 M. Skłodowskiej-Curie Street, 85-094 Bydgoszcz. Poland
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Andrade JMD, Moura FMDL, Silva TMSS, Medeiros ESD. Listeria monocytogenes in ham sliced in supermarkets in Recife city, Pernambuco state. ARQUIVOS DO INSTITUTO BIOLÓGICO 2019. [DOI: 10.1590/1808-1657000652018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
ABSTRACT: The aim of this study was to investigate Listeria monocytogenes in ham sliced in supermarkets in Recife city, Pernambuco state. In total, 40 samples of sliced ham were collected, and 25 g of ham was added to 225 mL of Demi Fraser broth. After incubation, 0.1 mL was inoculated in Fraser broth and, subsequently, sown in supplemented Listeria Selective Agar, based on Otaviani and Agosti. The following tests were carried out for confirmation purposes: Gram stain, motility test, catalase test and cAMP test. There was L. monocytogenes in 25% (10/40) of the samples. The presence of L. monocytogenes in ready-to-eat food, such as sliced ham, is likely related to lack of proper equipment-cleaning in supermarkets, a fact that poses great risk to public health.
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Oh H, Kim S, Lee S, Ha J, Lee J, Choi Y, Lee Y, Kim Y, Seo Y, Yoon Y. Development of Hydrogels to Improve the Safety of Yukhoe (Korean Beef Tartare) by Reducing Psychrotrophic Listeria monocytogenes Cell Counts on Raw Beef Surface. Korean J Food Sci Anim Resour 2018; 38:1189-1195. [PMID: 30675111 PMCID: PMC6335136 DOI: 10.5851/kosfa.2018.e50] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 10/23/2018] [Accepted: 10/23/2018] [Indexed: 11/06/2022] Open
Abstract
This study developed an antimicrobial hydrogel to control Listeria
monocytogenes in Yukhoe (Korean beef tartare).
Four hydrogels (hydrogel 1: 5% alginate+1% chitosan+0.2% CaCl2,
hydrogel 2: 1% κ-carrageenan+1% chitosan, hydrogel 3: 2%
κ-carrageenan+1% CaCl2, and hydrogel 4: 2%
κ-carrageenan+3% CaCl2) were prepared. The hydrogels then
absorbed 0.1% grapefruit seed extract (GSE) and 0.1% citrus extract (CE) for 30,
60, 120, and 240 min to be antimicrobial hydrogels. To select the most effective
antimicrobial hydrogel, their swelling ratio (SR) and antilisterial activities
were determined. The selected hydrogel (2×2 cm) was then placed on
surface of beef (round; 3×3 cm), where L. monocytogenes
(ca. 106 CFU/g) were inoculated, and the cell counts were enumerated
on PALCAM agar. Among the hydrogels, the SR of hydrogel 1 increased with
absorbing time, but other hydrogels showed no significant changes. Antimicrobial
hydrogel 1 showed higher (p<0.05) antilisterial activity than other
antimicrobial hydrogels, especially for the one absorbed the antimicrobial for
120 min. Thus, the antimicrobial hydrogel 1 absorbed antimicrobials for 120 min
was applied on raw beef at 4℃, and reduced (p<0.05) more than 90%
of L. monocytogenes on raw beef. These results indicate that
antimicrobial hydrogel 1 formulated with 0.1% GSE or 0.1% CE is appropriate to
improve the safety of Yukhoe by reducing psychrotrophic
L. monocytogenes cell counts on raw beef.
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Affiliation(s)
- Hyemin Oh
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea.,Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - Sejeong Kim
- Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - Soomin Lee
- Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - Jimyeong Ha
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea.,Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - Jeeyeon Lee
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea.,Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - Yukyung Choi
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea.,Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - Yewon Lee
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea.,Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - Yujin Kim
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea.,Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - Yeongeun Seo
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea.,Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
| | - Yohan Yoon
- Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea.,Risk Analysis Research Center, Sookmyung Women's University, Seoul 04310, Korea
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Gérard A, El-Hajjaji S, Niyonzima E, Daube G, Sindic M. Prevalence and survival of Listeria monocytogenes
in various types of cheese-A review. INT J DAIRY TECHNOL 2018. [DOI: 10.1111/1471-0307.12552] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Amaury Gérard
- Laboratory of Quality and Safety of Agro-Food Products; Gembloux Agro-Bio Tech; University of Liège; Passage des Déportés, 2 5030 Gembloux Belgium
| | - Soundous El-Hajjaji
- Laboratory of Quality and Safety of Agro-Food Products; Gembloux Agro-Bio Tech; University of Liège; Passage des Déportés, 2 5030 Gembloux Belgium
| | - Eugène Niyonzima
- Food Safety and Quality Management Department; School of Food Science and Technology; University of Rwanda; Avenue de l'armée, P.O. Box 3900 Kigali Rwanda
| | - Georges Daube
- Food Science Department; Faculty of Veterinary Medicine; FARAH, University of Liège; Sart-Tilman B43b 4000 Liège Belgium
| | - Marianne Sindic
- Laboratory of Quality and Safety of Agro-Food Products; Gembloux Agro-Bio Tech; University of Liège; Passage des Déportés, 2 5030 Gembloux Belgium
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Al-Ali HJ, Al-Rodhan MA, Al-Hilali SA, Al-Charrakh AH, Al-Mohana AM, Hadi ZJ. Molecular detection ofserotype groups of Listeria monocytogenes isolated from gallbladder of cattle and sheep in Iraq. Vet World 2018; 11:431-436. [PMID: 29805206 PMCID: PMC5960780 DOI: 10.14202/vetworld.2018.431-436] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 02/27/2018] [Indexed: 11/16/2022] Open
Abstract
Aim This study was designed to investigate the occurrence of serotypes of Listeria monocytogenes, an important food-borne pathogen, in gallbladder samples from cattle and sheep. Materials and Methods Three hundred samples were collected and screened for the presence of L. monocytogenes. The identification of the isolates was confirmed by API-Listeria system and by the presence of hemolysin (hyl) gene. The isolates were subjected to polymerase chain reaction-based serotype identification with d1 (division 1), d2 (division 2), glt, mama (mismatch amplification mutation assay), and flaA (flagellin protein) genes. Results A total of 8 (2.7%) L. monocytogenes were recovered from 6 (4.0%) samples of sheep and 2 (1.3%) samples of cattle. All isolates showed positive results with Hly primers. Four isolates carried d1 gene, did not possess glt gene and harbored mama gene. The serotypes of these isolates were identified as 4a or 4c. The other 4 isolates carried d2 gene, 3 of them were positive with the FlaA primers, and hence, determined to be a 1/2a or 3a serotype, and 1 isolate was determined to be 1/2c or 3c serotype. Conclusion This study concluded that the presence of 1/2a serotype in gallbladder samples indicates public health risk through cross-contamination of meat at slaughterhouses.
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Affiliation(s)
| | - Mohsen Abd Al-Rodhan
- Department of Clinical and Laboratory Science, College of Pharmacy, University of Al-Qadisiyah, Diwaniyah, Iraq
| | | | - Alaa Hani Al-Charrakh
- Department of Microbiology, College of Medicine, Babylon University, Hillah, Babylon Governorate, Iraq
| | | | - Zainab Jaber Hadi
- Department of Microbiology, College of Medicine, University of Kufa, Kufa, Iraq
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Gonçalves-Tenório A, Silva BN, Rodrigues V, Cadavez V, Gonzales-Barron U. Prevalence of Pathogens in Poultry Meat: A Meta-Analysis of European Published Surveys. Foods 2018; 7:E69. [PMID: 29751496 PMCID: PMC5977089 DOI: 10.3390/foods7050069] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 04/24/2018] [Accepted: 04/26/2018] [Indexed: 01/05/2023] Open
Abstract
The objective of this study was to investigate and summarize the levels of incidence of Salmonella spp., Listeria monocytogenes, Staphylococcus aureus and Campylobacter spp. in poultry meat commercialized in Europe. After systematic review, incidence data and study characteristics were extracted from 78 studies conducted in 21 European countries. Pooled prevalence values from 203 extracted observations were estimated from random-effects meta-analysis models adjusted by pathogen, poultry type, sampling stage, cold preservation type, meat cutting type and packaging status. The results suggest that S. aureus is the main pathogen detected in poultry meat (38.5%; 95% CI: 25.4⁻53.4), followed by Campylobacter spp. (33.3%; 95% CI: 22.3⁻46.4%), while L. monocytogenes and Salmonella spp. present lower prevalence (19.3%; 95% CI: 14.4⁻25.3% and 7.10%; 95% CI: 4.60⁻10.8%, respectively). Despite the differences in prevalence, all pathogens were found in chicken and other poultry meats, at both end-processing step and retail level, in packed and unpacked products and in several meat cutting types. Prevalence data on cold preservation products also revealed that chilling and freezing can reduce the proliferation of pathogens but might not be able to inactivate them. The results of this meta-analysis highlight that further risk management strategies are needed to reduce pathogen incidence in poultry meat throughout the entire food chain across Europe, in particular for S. aureus and Campylobacter spp.
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Affiliation(s)
- Andiara Gonçalves-Tenório
- CIMO Mountain Research Centre, School of Agriculture, Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5301-855 Bragança, Portugal.
| | - Beatriz Nunes Silva
- CIMO Mountain Research Centre, School of Agriculture, Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5301-855 Bragança, Portugal.
| | - Vânia Rodrigues
- CIMO Mountain Research Centre, School of Agriculture, Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5301-855 Bragança, Portugal.
| | - Vasco Cadavez
- CIMO Mountain Research Centre, School of Agriculture, Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5301-855 Bragança, Portugal.
| | - Ursula Gonzales-Barron
- CIMO Mountain Research Centre, School of Agriculture, Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5301-855 Bragança, Portugal.
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Chin PS, Ang GY, Yu CY, Tan EL, Tee KK, Yin WF, Chan KG, Tan GYA. Prevalence, Antimicrobial Resistance, and Genetic Diversity of Listeria spp. Isolated from Raw Chicken Meat and Chicken-Related Products in Malaysia. J Food Prot 2018; 81:284-289. [PMID: 29360399 DOI: 10.4315/0362-028x.jfp-17-186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Listeria spp. are ubiquitous in nature and can be found in various environmental niches such as soil, sewage, river water, plants, and foods, but the most frequently isolated species are Listeria monocytogenes and Listeria innocua. In this study, the presence of Listeria spp. in raw chicken meat and chicken-related products sold in local markets in Klang Valley, Malaysia was investigated. A total of 44 Listeria strains (42 L. innocua and 2 L. welshimeri) were isolated from 106 samples. Antibiotic susceptibility tests of the L. innocua strains revealed a high prevalence of resistance to clindamycin (92.9%), ceftriaxone (76.2%), ampicillin (73.8%), tetracycline (69%), and penicillin G (66.7%). Overall, 31 L. innocua and 1 L. welshimeri strain were multidrug resistant, i.e., nonsusceptible to at least one antimicrobial agent in three or more antibiotic classes. The majority of the L. innocua strains were placed into five AscI pulsogroups, and overall 26 distinct AscI pulsotypes were identified. The detection of multidrug-resistant Listeria strains from different food sources and locations warrants attention because these strains could serve as reservoirs for antimicrobial resistance genes and may facilitate the spread and emergence of other drug-resistant strains.
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Affiliation(s)
- Pui San Chin
- 1 Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Geik Yong Ang
- 2 Integrative Pharmacogenomics Institute (iPROMISE), Universiti Teknologi MARA, Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor, Malaysia.,3 Faculty of Sports Science & Recreation, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - Choo Yee Yu
- 2 Integrative Pharmacogenomics Institute (iPROMISE), Universiti Teknologi MARA, Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor, Malaysia
| | - Eng Lee Tan
- 1 Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Kok Keng Tee
- 4 Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Wai Fong Yin
- 1 Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Kok Gan Chan
- 1 Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia.,5 Vice Chancellor Office, Jiangsu University, Zhenjiang 212013, People's Republic of China (ORCID: http://orcid.org/0000-0002-1883-1115 )
| | - Geok Yuan Annie Tan
- 1 Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
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36
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Listeria monocytogenes Biofilms in the Wonderland of Food Industry. Pathogens 2017; 6:pathogens6030041. [PMID: 28869552 PMCID: PMC5617998 DOI: 10.3390/pathogens6030041] [Citation(s) in RCA: 126] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 09/01/2017] [Accepted: 09/03/2017] [Indexed: 01/31/2023] Open
Abstract
The foodborne pathogen Listeria monocytogenes is a concern in food safety because of its ability to form biofilm and to persist in food industry. In this mini-review, the issue represented by this pathogen and some of the latest efforts performed in order to investigate the composition of biofilms formed by L. monocytogenes are summarized.
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Occurrence and characterization of food-borne pathogens isolated from fruit, vegetables and sprouts retailed in the Czech Republic. Food Microbiol 2017; 63:147-152. [DOI: 10.1016/j.fm.2016.11.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 11/08/2016] [Accepted: 11/17/2016] [Indexed: 11/20/2022]
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38
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Losio MN, Dalzini E, Pavoni E, Merigo D, Finazzi G, Daminelli P. A survey study on safety and microbial quality of “gluten-free” products made in Italian pasta factories. Food Control 2017. [DOI: 10.1016/j.foodcont.2016.08.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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39
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Prevalence and molecular characterization of Listeria spp. and Listeria monocytogenes isolated from fish, shrimp, and cooked ready-to-eat (RTE) aquatic products in Iran. Lebensm Wiss Technol 2016. [DOI: 10.1016/j.lwt.2016.06.020] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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40
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Voloski F, Tonello L, Ramires T, Reta G, Dewes C, Iglesias M, Mondadori R, Gandra E, da Silva W, Duval E. Influence of cutting and deboning operations on the microbiological quality and shelf life of buffalo meat. Meat Sci 2016; 116:207-12. [DOI: 10.1016/j.meatsci.2016.02.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 02/04/2016] [Accepted: 02/09/2016] [Indexed: 01/26/2023]
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Zittermann SI, Stanghini B, See RS, Melano RG, Boleszczuk P, Murphy A, Maki A, Mallo GV. Assessment of Listeria sp. Interference Using a Molecular Assay To Detect Listeria monocytogenes in Food. J Food Prot 2016; 79:138-43. [PMID: 26735040 DOI: 10.4315/0362-028x.jfp-15-122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Detection of Listeria monocytogenes in food is currently based on enrichment methods. When L. monocytogenes is present with other Listeria species in food, the species compete during the enrichment process. Overgrowth competition of the nonpathogenic Listeria species might result in false-negative results obtained with the current reference methods. This potential issue was noted when 50 food samples artificially spiked with L. monocytogenes were tested with a real-time PCR assay and Canada's current reference method, MFHPB-30. Eleven of the samples studied were from foods naturally contaminated with Listeria species other than those used for spiking. The real-time PCR assay detected L. monocytogenes in all 11 of these samples; however, only 6 of these samples were positive by the MFHPB-30 method. To determine whether L. monocytogenes detection can be affected by other species of the same genus due to competition, an L. monocytogenes strain and a Listeria innocua strain with a faster rate of growth in the enrichment broth were artificially coinoculated at different ratios into ground pork meat samples and cultured according to the MFHPB-30 method. L. monocytogenes was detected only by the MFHPB-30 method when L. monocytogenes/L. innocua ratios were 6.0 or higher. In contrast, using the same enrichments, the real-time PCR assay detected L. monocytogenes at ratios as low as 0.6. Taken together, these findings support the hypothesis that L. monocytogenes can be outcompeted by L. innocua during the MFHPB-30 enrichment phase. However, more reliable detection of L. monocytogenes in this situation can be achieved by a PCR-based method mainly because of its sensitivity.
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Affiliation(s)
| | | | - Ryan Soo See
- Public Health Ontario, Toronto, Ontario, Canada M5G 1M1
| | - Roberto G Melano
- Public Health Ontario, Toronto, Ontario, Canada M5G 1M1; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada M5S 1A8; Mount Sinai Hospital, Toronto, Ontario, Canada M5G 1X5
| | | | - Allana Murphy
- Public Health Ontario, Toronto, Ontario, Canada M5G 1M1
| | - Anne Maki
- Public Health Ontario, Toronto, Ontario, Canada M5G 1M1
| | - Gustavo V Mallo
- Public Health Ontario, Toronto, Ontario, Canada M5G 1M1; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada M5S 1A8.
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Gómez D, Iguácel LP, Rota MC, Carramiñana JJ, Ariño A, Yangüela J. Occurrence of Listeria monocytogenes in Ready-to-Eat Meat Products and Meat Processing Plants in Spain. Foods 2015; 4:271-282. [PMID: 28231204 PMCID: PMC5224534 DOI: 10.3390/foods4030271] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/06/2015] [Accepted: 07/08/2015] [Indexed: 11/23/2022] Open
Abstract
The aim of this work was to study the occurrence of Listeria monocytogenes in several types of ready-to-eat (RTE) meat products and in the environment of meat processing plants. A total of 129 samples of RTE meat products and 110 samples from work surfaces and equipment were analyzed. L. monocytogenes was detected in 6 out of 35 cooked products (17.14%), 21 out of 57 raw-cured products (36.84%), and 9 out of 37 dry-cured, salted products (24.32%). The number of sample units that exceeded the food safety limit of 100 cfu/g decreased from the manufacture date to half shelf life, and then it was further reduced at the end of shelf life. L. monocytogenes was detected in 25 out of 110 (22.72%) food contact surfaces. The number of positive and negative results from both food and environmental samples were cross-tabulated and the calculated Cohen's kappa coefficient (κ) was 0.3233, indicating a fair agreement in terms of Listeria contamination. L.monocytogenes was recovered after cleaning and disinfection procedures in four plants, highlighting the importance of thorough cleaning and disinfection.
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Affiliation(s)
- Diego Gómez
- Department of Animal Production and Food Science, Veterinary Faculty, University of Zaragoza, c/Miguel Servet 177, Zaragoza 50013, Spain.
| | - Laura Pilar Iguácel
- Agrifood Research and Technology Centre of Aragón (CITA), Avda. Montañana 930, Zaragoza 50059, Spain.
| | - Mª Carmen Rota
- Department of Animal Production and Food Science, Veterinary Faculty, University of Zaragoza, c/Miguel Servet 177, Zaragoza 50013, Spain.
| | - Juan José Carramiñana
- Department of Animal Production and Food Science, Veterinary Faculty, University of Zaragoza, c/Miguel Servet 177, Zaragoza 50013, Spain.
| | - Agustín Ariño
- Department of Animal Production and Food Science, Veterinary Faculty, University of Zaragoza, c/Miguel Servet 177, Zaragoza 50013, Spain.
| | - Javier Yangüela
- Department of Animal Production and Food Science, Veterinary Faculty, University of Zaragoza, c/Miguel Servet 177, Zaragoza 50013, Spain.
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The occurrence of Listeria monocytogenes in retail ready-to-eat meat and poultry products related to the levels of acetate and lactate in the products. Food Control 2015. [DOI: 10.1016/j.foodcont.2014.12.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Garedew L, Taddese A, Biru T, Nigatu S, Kebede E, Ejo M, Fikru A, Birhanu T. Prevalence and antimicrobial susceptibility profile of listeria species from ready-to-eat foods of animal origin in Gondar Town, Ethiopia. BMC Microbiol 2015; 15:100. [PMID: 25963134 PMCID: PMC4427937 DOI: 10.1186/s12866-015-0434-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 05/01/2015] [Indexed: 11/10/2022] Open
Abstract
Background Listeriosis, mostly caused by Listeria monocytogenes species, has become a major concern to public health authorities due to its clinical severity and high mortality rate, particularly in high risk groups. Currently, there is limited information regarding the prevalence and antimicrobial susceptibility profiles of listeria species in ready-to-eat foods of animal origin in Gondar town, Ethiopia. The aim of this study was to determine the prevalence and antimicrobial susceptibility pattern of Listeria species isolated from ready-to-eat food of animal origin from public dinning places in Gondar town, Ethiopia. A cross sectional study on ready-toeat foods of animal origin sampled from major supermarkets, butcher shops, pastry shops, restaurants and hotels was carried out. Culture, biochemical and sugar tests were conducted for listeria species identification and disc diffusion test was performed to study the antimicrobial susceptibility profiles of the isolates. Results Out of 384 food samples examined, 96 (25%) were positive for Listeria species. Listeria monocytogenes was detected in 24 (6.25%) of the samples. Listeria monocytogenes was isolated from cake, raw meat, ice cream, minced beef, fish, unpasteurized milk and pizza in that order from higher to lower rate. Assessment of antimicrobial susceptibility profile of L. monocytogenes revealed the presence of four multi-drug resistant isolates. The higher resistance rate was recorded for penicillin, nalidixic acid, tetracycline and chloramphenicol, in decreasing order. All L. monocytogenes identified in the current study were sensitive to amoxicillin, cephalothin, cloxacillin, sulfamethoxazole, gentamicin and vancomycin. Conclusions The presence of L. monocytogenes including drug resistant and multidrug resistant isolates in some ready-to-eat food items is an indicator of the presence of public health hazards to the consumer, particularly to the high-risk groups. Hence awareness creation on food safety and implementation of regulations about the use of drugs in humans and animals is strongly recommended. Electronic supplementary material The online version of this article (doi:10.1186/s12866-015-0434-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Legesse Garedew
- St. Paul's Hospital Millennium Medical College, Department of Microbiology, Addis Ababa, Ethiopia.
| | - Ayele Taddese
- Max Planck Institute for Heart and Lung Research, Department III-Developmental Genetics, Bad Nauheim, Germany.
| | - Tigist Biru
- University of Gondar, Faculty of Veterinary Medicine, Gondar, Ethiopia.
| | - Seleshe Nigatu
- University of Gondar, Faculty of Veterinary Medicine, Gondar, Ethiopia.
| | - Elias Kebede
- University of Gondar, Faculty of Veterinary Medicine, Gondar, Ethiopia.
| | - Mebrat Ejo
- University of Gondar, Faculty of Veterinary Medicine, Gondar, Ethiopia.
| | - Abraham Fikru
- Hawassa University, School of Veterinary Medicine, Awassa, Ethiopia.
| | - Tamiru Birhanu
- University of Montreal, Faculty of Veterinary Medicine, Montreal, Canada.
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Gião MS, Blanc S, Porta S, Belenguer J, Keevil CW. Improved recovery of Listeria monocytogenes from stainless steel and polytetrafluoroethylene surfaces using air/water ablation. J Appl Microbiol 2015; 119:253-62. [PMID: 25943582 DOI: 10.1111/jam.12837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 04/10/2015] [Accepted: 04/24/2015] [Indexed: 11/30/2022]
Abstract
AIMS To develop a gentle ablation technique to recover Listeria monocytogenes biofilms from stainless steel (SS) and polytetrafluoroethylene (PTFE) surfaces by using compressed air and water injection. METHODS AND RESULTS Biofilms were grown for 4, 24 and 48 h or 7 days and a compressed air and water flow at 2, 3 and 4 bars was applied for cell removal. Collected cells were quantified for total/dead by staining with SYTO 9/PI double staining and cultivable populations were determined by plating onto brain heart infusion (BHI) agar, while coupon surfaces also were stained with DAPI to quantify in situ the remaining cells. The recovery efficiency was compared to that of conventional swabbing. Results showed that the air/water ablation is able to collect up to 98·6% of cells from SS surfaces while swabbing only recovered 11·2% of biofilm. Moreover, air/water ablation recovered 99·9% of cells from PTFE surfaces. CONCLUSIONS The high recovery rate achieved by this technique, along with the fact that cells were able to retain membrane integrity and cultivability, indicate that this device is suitable for the gentle recovery of viable L. monocytogenes biofilm cells. SIGNIFICANCE AND IMPACT OF THE STUDY This work presents a highly efficient technique to remove, collect and quantify L. monocytogenes from surfaces commonly used in the food industry, which can thus serve as an important aid in verifying cleaning and sanitation as well as in reducing the likelihood of cross-contamination events.
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Affiliation(s)
- M S Gião
- Centre for Biological Sciences, University of Southampton, Southampton, UK
| | - S Blanc
- 40-30, Parc Technologique des Fontaines, Chemin des Franques, Bernin, France
| | - S Porta
- Ainia, Parque Tecnólogico de Valencia, Valencia, Spain
| | - J Belenguer
- Ainia, Parque Tecnólogico de Valencia, Valencia, Spain
| | - C W Keevil
- Centre for Biological Sciences, University of Southampton, Southampton, UK
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Bouayad L, Hamdi TM, Naim M, Leclercq A, Lecuit M. Prevalence of Listeria spp. and Molecular Characterization of Listeria monocytogenes Isolates from Broilers at the Abattoir. Foodborne Pathog Dis 2015; 12:606-11. [PMID: 25942617 DOI: 10.1089/fpd.2014.1904] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Products from three broiler abattoirs were sampled for Listeria species to evaluate the changes in the prevalence and contamination rates at two stages of processing. Sampling was performed at the evisceration stage and at the end of processing after packaging and refrigerating at 4°C for 24 h. A total of 212 samples were collected; 52 were from abattoir A, and 80 samples each were collected from abattoirs B and C. Among all samples, 99 (46.7%) tested positive for Listeria, including L. monocytogenes 19 (8.9%), L. innocua 69 (32.5%), L. grayi 10 (4.7%), and L. welshimeri 1 (0.5%). The L. monocytogenes contamination rate varied from 5% to 11.5% in the 3 abattoirs. L. innocua was the most common species identified and was found in 8.8% of the samples from abattoir A and 33.7% of the samples from both abattoirs B and C. Twenty-six of the L. monocytogenes isolates obtained from positive samples were subjected to serotyping by multiplex polymerase chain reaction and characterization by the pulsed-field gel electrophoresis (PFGE) method using two cutting enzymes, ApaI and AscI. Three molecular serogroups were identified: IIa, IIb, and IVb. Serogroup IIa was common to all abattoirs, and serogroups IIb and IVb were found only in abattoir C. The 10 different obtained PFGE profiles were grouped into 7 clusters; some of these clusters were common to the 3 abattoirs, and others were specific to the abattoirs in which they were identified. This study revealed a high prevalence of Listeria spp., particularly L. monocytogenes, in raw broilers. This high incidence presents a risk to consumers due to the potential occurrence of cross-contamination with other foods in domestic refrigerators and the ability of these microorganisms to survive in undercooked products.
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Affiliation(s)
- Leila Bouayad
- 1 Laboratory of Food Hygiene and Quality Insurance System, High National Veterinary School , Algiers, Algeria
| | - Taha M Hamdi
- 1 Laboratory of Food Hygiene and Quality Insurance System, High National Veterinary School , Algiers, Algeria
| | - Malek Naim
- 2 Laboratory of Microbiology of the Central Hospital of the Army , Algiers, Algeria
| | - Alexandre Leclercq
- 3 Biology of Infection Unit , French National Reference Center and World Health Organization Collaborating Centre on Listeria, Institut Pasteur, Paris, France
| | - Marc Lecuit
- 3 Biology of Infection Unit , French National Reference Center and World Health Organization Collaborating Centre on Listeria, Institut Pasteur, Paris, France
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Wang G, Qian W, Zhang X, Wang H, Ye K, Bai Y, Zhou G. Prevalence, genetic diversity and antimicrobial resistance of Listeria monocytogenes isolated from ready-to-eat meat products in Nanjing, China. Food Control 2015. [DOI: 10.1016/j.foodcont.2014.07.057] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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