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Rampacci E, Diaferia M, Lucentini L, Brustenga L, Capasso M, Girardi S, Gizzi I, Primavilla S, Veronesi F, Passamonti F. Detection of zoonotic enteropathogens in captive large felids in Italy. Zoonoses Public Health 2024; 71:200-209. [PMID: 38017609 DOI: 10.1111/zph.13099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 06/07/2023] [Accepted: 11/06/2023] [Indexed: 11/30/2023]
Abstract
AIMS Within the One Health paradigm, infectious disease surveillance have been developed for domestic and wild animals, leaving the role of captive non-domestic populations, especially felids in zoos and circuses, less explored. This study addresses the proximity of these captive animals to urban areas, necessitating focused monitoring for potential zoonotic enteropathogens. The present work aimed to investigate the presence of such zoonotic enteropathogens in faecal samples from captive large felid populations. METHODS AND RESULTS A total of 108 faecal samples were collected in three circuses, five zoos and one rescue centre across Italy. Salmonella spp. isolation, serotyping and antimicrobial susceptibility testing were conducted on all samples. Additionally, 60 samples were also examined for gastrointestinal parasites using standard coprological techniques. Giardia spp. detection employed direct immunofluorescent staining and specific PCR, while Toxoplasma gondii was detected using PCR targeting B1 gene. A total of 51 Salmonella enterica subsp. enterica were isolated, with predominant serovariants including Infantis (43.1%), Coeln (11.8%) and Newport (11.8%). The captive felids likely act as asymptomatic carriers of foodborne Salmonella, with notable resistance ampicillin and trimethoprim-sulfamethoxazole, no resistance to enrofloxacin was noted. Microscopic analysis revealed Toxascaris leonina eggs in 11 faecal samples (18.3%) and Giardia duodenalis cysts in one animal (1.7%). CONCLUSIONS Captive animals in public settings may act as sources of Salmonella infection and enteroparasitosis for both occupational and general exposure. The study emphasizes the role of captive animals in antimicrobial resistance dynamics, highlighting the need for routine pathogen screening in the management practices of zoological structures.
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Affiliation(s)
- Elisa Rampacci
- Department of Veterinary Medicine, University of Perugia, Perugia, Italy
| | - Manuela Diaferia
- Department of Veterinary Medicine, University of Perugia, Perugia, Italy
| | - Livia Lucentini
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Perugia, Italy
| | - Leonardo Brustenga
- Department of Veterinary Medicine, University of Perugia, Perugia, Italy
| | - Michele Capasso
- Department of Veterinary Medicine & Animal Production, University of Naples 'Federico II', Naples, Italy
| | - Stefano Girardi
- Department of Veterinary Medicine, University of Perugia, Perugia, Italy
| | - Ilaria Gizzi
- Department of Veterinary Medicine, University of Perugia, Perugia, Italy
| | - Sara Primavilla
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche 'Togo Rosati', Perugia, Italy
| | - Fabrizia Veronesi
- Department of Veterinary Medicine, University of Perugia, Perugia, Italy
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2
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Fischerström K, Dryselius R, Lindblad M, Kühlmann-Berenzon S, Karamehmedovic N, Börjesson S, Hashemi N, Gunn I, Gustavsson AM, Lindroos N, Nederby-Öhd J, Widerström M, Rimhanen-Finne R, Vainio A, Rehn M. Outbreak of Salmonella Typhimurium linked to Swedish pre-washed rocket salad, Sweden, September to November 2022. Euro Surveill 2024; 29:2300299. [PMID: 38456218 PMCID: PMC10986667 DOI: 10.2807/1560-7917.es.2024.29.10.2300299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 12/04/2023] [Indexed: 03/09/2024] Open
Abstract
In September 2022, the Public Health Agency of Sweden observed an increase in domestic Salmonella Typhimurium cases through the Swedish electronic notification system, and an outbreak strain was identified with whole genome sequencing. Overall, 109 cases with symptom onset between 17 September and 24 November 2022 were reported from 20 of 21 Swedish regions. The median age of cases was 52 years (range 4-87 years) and 62% were female. A case-control study found cases to be associated with consumption of rocket salad (adjusted odds ratio (aOR) = 4.9; 95% confidence interval (CI): 2.4-10, p value < 0.001) and bagged mixed salad (aOR = 4.0; 95% CI: 1.9-8.1, p value < 0.001). Trace-back, supported by Finnish authorities who identified the Swedish outbreak strain in a Finnish cluster during the same time period, identified rocket salad, cultivated, pre-washed and pre-packed in Sweden as the likely source of the outbreak. No microbiological analyses of rocket salad were performed. Our investigation indicates that bagged leafy greens such as rocket salad, regardless of pre-washing procedures in the production chain, may contain Salmonella and cause outbreaks, posing a health risk to consumers. We emphasise the need for primary producers of leafy greens to identify possible contamination points to prevent outbreaks.
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Affiliation(s)
- Karolina Fischerström
- ECDC Fellowship Programme, Field Epidemiology path (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
- Public Health Agency of Sweden (PHAS), Solna, Sweden
| | | | | | | | | | - Stefan Börjesson
- School of Health Science, Örebro University, Örebro, Sweden
- Public Health Agency of Sweden (PHAS), Solna, Sweden
| | | | - Ingrid Gunn
- Department of Infectious Disease Prevention and Control, Region Kalmar County, Kalmar, Sweden
| | - Ann-Mari Gustavsson
- Department of Infection Prevention and Control, County of Värmland, Karlstad, Sweden
| | - Nilla Lindroos
- Department of Infectious Disease Prevention and Control, Region Halland, Halmstad, Sweden
| | - Joanna Nederby-Öhd
- Department of Infectious Disease Prevention and Control, Stockholm Region, Stockholm, Sweden
| | | | - Ruska Rimhanen-Finne
- Department of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Anni Vainio
- Department of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Moa Rehn
- Public Health Agency of Sweden (PHAS), Solna, Sweden
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3
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Joachim A, Auersperg V, Drüe J, Wiedermann S, Hinney B, Spergser J. Parasites and zoonotic bacteria in the feces of cats and dogs from animal shelters in Carinthia, Austria. Res Vet Sci 2023; 164:105022. [PMID: 37741041 DOI: 10.1016/j.rvsc.2023.105022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/04/2023] [Accepted: 09/15/2023] [Indexed: 09/25/2023]
Abstract
Due to their close associations with humans, dogs and cats can be important reservoirs for zoonotic pathogens. In the current study 200 fecal samples of dogs (n = 70 samples) and cats (n = 130 samples) from animal shelters in Carinthia, southern Austria, were examined for the presence of parasites (fecal flotation and larval migration assay) and selected bacteria. Overall, 17.1% of the canine and 38.5% of the feline samples were positive for parasites (p < 0.001), most commonly Giardia duodenalis (dogs and cats), including potentially zoonotic genotypes revealed by multilocus genotyping, and Toxocara cati (cats). Cryptosporidium (C. felis), Cystoisospora spp. (dogs and cats), hookworms (dog), Trichuris (dog) Capillaria hepatica (cats), taeniids (cat), and Aelurostrongylus abstrusus (cat) were also found. Zoonotic bacteria were detected in 10.5% of the samples, Salmonella enterica (dogs), Campylobacter jejuni (dogs and cats) and Yersinia enterocolitica (cat) and were significantly associated with parasite infections in cats but not in dogs. Samples that were positive for several pathogens were common; especially G. duodenalis and T. cati were frequently found in association with each other, other parasites or bacteria. The spectrum of detected pathogens is comparable to that of other dog and cat populations in central Europe. However, since animals from shelters are frequently rehomed, diagnostic measures, appropriate hygiene and therapy as well as training of shelter staff are recommended to prevent zoonotic transmission of enteropathogens to staff or new owners. The presence of heteroxenic parasites, i.e. Aelurostrongylus abstrusus and Taenia taeniaeformis, and spurious excretion of Ca. hepatica in cats, indicates that these animals preyed on intermediate hosts, and that biosafety measures in pet shelters need to be evaluated for their efficacy in the prevention of pathogen transmission.
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Affiliation(s)
- Anja Joachim
- Institute of Parasitology, Department of Pathobiology, University of Veterinary Medicine, A-1210 Vienna, Austria.
| | - Valerie Auersperg
- Institute of Parasitology, Department of Pathobiology, University of Veterinary Medicine, A-1210 Vienna, Austria.
| | - Joel Drüe
- Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine, A-1210 Vienna, Austria.
| | - Sandra Wiedermann
- Institute of Parasitology, Department of Pathobiology, University of Veterinary Medicine, A-1210 Vienna, Austria.
| | - Barbara Hinney
- Institute of Parasitology, Department of Pathobiology, University of Veterinary Medicine, A-1210 Vienna, Austria.
| | - Joachim Spergser
- Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine, A-1210 Vienna, Austria.
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4
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Bumunang EW, Zaheer R, Niu D, Narvaez-Bravo C, Alexander T, McAllister TA, Stanford K. Bacteriophages for the Targeted Control of Foodborne Pathogens. Foods 2023; 12:2734. [PMID: 37509826 PMCID: PMC10379335 DOI: 10.3390/foods12142734] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/05/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
Foodborne illness is exacerbated by novel and emerging pathotypes, persistent contamination, antimicrobial resistance, an ever-changing environment, and the complexity of food production systems. Sporadic and outbreak events of common foodborne pathogens like Shiga toxigenic E. coli (STEC), Salmonella, Campylobacter, and Listeria monocytogenes are increasingly identified. Methods of controlling human infections linked with food products are essential to improve food safety and public health and to avoid economic losses associated with contaminated food product recalls and litigations. Bacteriophages (phages) are an attractive additional weapon in the ongoing search for preventative measures to improve food safety and public health. However, like all other antimicrobial interventions that are being employed in food production systems, phages are not a panacea to all food safety challenges. Therefore, while phage-based biocontrol can be promising in combating foodborne pathogens, their antibacterial spectrum is generally narrower than most antibiotics. The emergence of phage-insensitive single-cell variants and the formulation of effective cocktails are some of the challenges faced by phage-based biocontrol methods. This review examines phage-based applications at critical control points in food production systems with an emphasis on when and where they can be successfully applied at production and processing levels. Shortcomings associated with phage-based control measures are outlined together with strategies that can be applied to improve phage utility for current and future applications in food safety.
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Affiliation(s)
- Emmanuel W Bumunang
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB T1K 1M4, Canada
| | - Rahat Zaheer
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB T1J 4B1, Canada
| | - Dongyan Niu
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Claudia Narvaez-Bravo
- Food and Human Nutritional Sciences, Faculty of Agricultural & Food Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Trevor Alexander
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB T1J 4B1, Canada
| | - Tim A McAllister
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB T1J 4B1, Canada
| | - Kim Stanford
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB T1K 1M4, Canada
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5
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Esmael A, Al-Hindi RR, Albiheyri RS, Alharbi MG, Filimban AAR, Alseghayer MS, Almaneea AM, Alhadlaq MA, Ayubu J, Teklemariam AD. Fresh Produce as a Potential Vector and Reservoir for Human Bacterial Pathogens: Revealing the Ambiguity of Interaction and Transmission. Microorganisms 2023; 11:microorganisms11030753. [PMID: 36985326 PMCID: PMC10056104 DOI: 10.3390/microorganisms11030753] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/08/2023] [Accepted: 03/10/2023] [Indexed: 03/17/2023] Open
Abstract
The consumer demand for fresh produce (vegetables and fruits) has considerably increased since the 1980s for more nutritious foods and healthier life practices, particularly in developed countries. Currently, several foodborne outbreaks have been linked to fresh produce. The global rise in fresh produce associated with human infections may be due to the use of wastewater or any contaminated water for the cultivation of fruits and vegetables, the firm attachment of the foodborne pathogens on the plant surface, and the internalization of these agents deep inside the tissue of the plant, poor disinfection practices and human consumption of raw fresh produce. Several investigations have been established related to the human microbial pathogens (HMPs) interaction, their internalization, and survival on/within plant tissue. Previous studies have displayed that HMPs are comprised of several cellular constituents to attach and adapt to the plant’s intracellular niches. In addition, there are several plant-associated factors, such as surface morphology, nutrient content, and plant–HMP interactions, that determine the internalization and subsequent transmission to humans. Based on documented findings, the internalized HMPs are not susceptible to sanitation or decontaminants applied on the surface of the fresh produce. Therefore, the contamination of fresh produce by HMPs could pose significant food safety hazards. This review provides a comprehensive overview of the interaction between fresh produce and HMPs and reveals the ambiguity of interaction and transmission of the agents to humans.
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Affiliation(s)
- Ahmed Esmael
- Botany and Microbiology Department, Faculty of Science, Benha University, Benha 13518, Egypt
- Nebraska Center for Virology, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
- Correspondence: (A.E.); (R.R.A.)
| | - Rashad R. Al-Hindi
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Correspondence: (A.E.); (R.R.A.)
| | - Raed S. Albiheyri
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Mona G. Alharbi
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Amani A. R. Filimban
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Mazen S. Alseghayer
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Monitoring and Risk Assessment Department, Saudi Food and Drug Authority, Riyadh 13513, Saudi Arabia
| | - Abdulaziz M. Almaneea
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Monitoring and Risk Assessment Department, Saudi Food and Drug Authority, Riyadh 13513, Saudi Arabia
| | - Meshari Ahmed Alhadlaq
- Molecular Biology Section, Reference Laboratory for Microbiology Department, Research and Laboratories Sector, Saudi Food and Drug Authority, Riyadh 13513, Saudi Arabia
| | - Jumaa Ayubu
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Addisu D. Teklemariam
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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6
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Faria CP, Pereira A, Almeida D, Pinto M, Lourenço Á, do Céu Sousa M. Molecular investigation of ready-to-eat salads for Giardia duodenalis and Cryptosporidium spp. in Portugal. Food Waterborne Parasitol 2023; 30:e00190. [PMID: 36923349 PMCID: PMC10009061 DOI: 10.1016/j.fawpar.2023.e00190] [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: 08/02/2022] [Revised: 02/10/2023] [Accepted: 02/14/2023] [Indexed: 02/24/2023] Open
Abstract
Foodborne outbreaks are often associated with the consumption of salads. However, published studies on the detection of foodborne pathogens in ready-to-eat salads are scarce. The aim of this study was to detect Giardia duodenalis and Cryptosporidium DNA in ready-to-eat salads, by applying techniques of molecular biology to study the frequency of contamination in salads. A total of 100 packages of ready-to-eat salads containing assorted leafy green vegetables were randomly purchased from hypermarkets located in central regions of Portugal (Coimbra and Viseu). Nested-PCR and qPCR methods were used to detect G. duodenalis and Cryptosporidium DNA. Species and assemblages of the parasites were identified by sequence analysis and PCR. Eighteen of the 100 samples (18%) were positive for G. duodenalis and twelve were sequenced and identified as assemblage A. Cryptosporidium spp. were not detected in any salads. Overall, pre-harvest and post-harvest preventive measures may be need for G. duodenalis control throughout the food production industry, from the field to consumers.
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Affiliation(s)
- Clarissa Perez Faria
- CNC - Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, 3030-548 Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, Azinhaga de Santa Comba, 3030-548 Coimbra, Portugal
| | - Adelaide Pereira
- Faculty of Pharmacy, University of Coimbra, Azinhaga de Santa Comba, 3030-548 Coimbra, Portugal
| | - Daniela Almeida
- Faculty of Pharmacy, University of Coimbra, Azinhaga de Santa Comba, 3030-548 Coimbra, Portugal
| | - Miguel Pinto
- Faculty of Pharmacy, University of Coimbra, Azinhaga de Santa Comba, 3030-548 Coimbra, Portugal
| | - Ágata Lourenço
- CNC - Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, 3030-548 Coimbra, Portugal
| | - Maria do Céu Sousa
- CNC - Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, 3030-548 Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, Azinhaga de Santa Comba, 3030-548 Coimbra, Portugal
- Corresponding author at: Faculty of Pharmacy and CNC, University of Coimbra, 3030-548 Coimbra, Portugal.
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7
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Microbiological Risk Assessment of Ready-to-Eat Leafy Green Salads via a Novel Electrochemical Sensor. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10040134] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Nowadays, the growing interest in a healthy lifestyle, to compensate for modern stressful habits, has led to an increased demand for wholesome products with quick preparation times. Fresh and ready-to-eat leafy green vegetables are generally perceived as salutary and safe, although they have been recognized as a source of food poisoning outbreaks worldwide. The reason is that these products retain much of their indigenous microflora after minimal industrial processing, and are expected to be consumed without any additional treatment by consumers. Microbiological safety requires a systematic approach that encompasses all aspects of production, processing and distribution. Nevertheless, the most common laboratory techniques used for the detection of pathogens are expensive, time consuming, need laboratory professionals and are not able to provide prompt results, required to undertake effective corrective actions. In this context, the solution proposed in this work is a novel electrochemical sensing system, able to provide real-time information on microbiological risk, which is also potentially embeddable in an industrial production line. The results showed the sensor ability to detect leafy green salad bacterial contaminations with adequate sensibility, even at a low concentration.
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8
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Antimicrobial activities of virgin olive oils in vitro and on lettuce from pathogen-inoculated commercial quick salad bags. Food Control 2022. [DOI: 10.1016/j.foodcont.2021.108657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Barberi G, González-Alonso V, Spilimbergo S, Barolo M, Zambon A, Facco P. Optimization of the Appearance Quality in CO 2 Processed Ready-to-Eat Carrots through Image Analysis. Foods 2021; 10:foods10122999. [PMID: 34945550 PMCID: PMC8700774 DOI: 10.3390/foods10122999] [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] [Received: 10/31/2021] [Revised: 11/26/2021] [Accepted: 12/01/2021] [Indexed: 01/19/2023] Open
Abstract
A high-pressure CO2 process applied to ready-to-eat food products guarantees an increase of both their microbial safety and shelf-life. However, the treatment often produces unwanted changes in the visual appearance of products depending on the adopted process conditions. Accordingly, the alteration of the visual appearance influences consumers' perception and acceptability. This study aims at identifying the optimal treatment conditions in terms of visual appearance by using an artificial vision system. The developed methodology was applied to fresh-cut carrots (Daucus carota) as the test product. The results showed that carrots packaged in 100% CO2 and subsequently treated at 6 MPa and 40 °C for 15 min maintained an appearance similar to the fresh product for up to 7 days of storage at 4 °C. Mild appearance changes were identified at 7 and 14 days of storage in the processed products. Microbiological analysis performed on the optimal treatment condition showed the microbiological stability of the samples up to 14 days of storage at 4 °C. The artificial vision system, successfully applied to the CO2 pasteurization process, can easily be applied to any food process involving changes in the appearance of any food product.
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Affiliation(s)
- Gianmarco Barberi
- CAPE-Lab–Computer Aided Process Engineering Laboratory, Department of Industrial Engineering, University of Padova, Via Marzolo, 9-35131 Padova, Italy; (G.B.); (M.B.)
| | - Víctor González-Alonso
- Superunit–CO2 Innovation Lab, Department of Industrial Engineering, University of Padova, Via Marzolo, 9-35131 Padova, Italy; (V.G.-A.); (S.S.); (A.Z.)
| | - Sara Spilimbergo
- Superunit–CO2 Innovation Lab, Department of Industrial Engineering, University of Padova, Via Marzolo, 9-35131 Padova, Italy; (V.G.-A.); (S.S.); (A.Z.)
| | - Massimiliano Barolo
- CAPE-Lab–Computer Aided Process Engineering Laboratory, Department of Industrial Engineering, University of Padova, Via Marzolo, 9-35131 Padova, Italy; (G.B.); (M.B.)
| | - Alessandro Zambon
- Superunit–CO2 Innovation Lab, Department of Industrial Engineering, University of Padova, Via Marzolo, 9-35131 Padova, Italy; (V.G.-A.); (S.S.); (A.Z.)
| | - Pierantonio Facco
- CAPE-Lab–Computer Aided Process Engineering Laboratory, Department of Industrial Engineering, University of Padova, Via Marzolo, 9-35131 Padova, Italy; (G.B.); (M.B.)
- Correspondence:
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10
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Ebani VV, Guardone L, Bertelloni F, Perrucci S, Poli A, Mancianti F. Survey on the Presence of Bacterial and Parasitic Zoonotic Agents in the Feces of Wild Birds. Vet Sci 2021; 8:171. [PMID: 34564565 PMCID: PMC8472958 DOI: 10.3390/vetsci8090171] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/20/2021] [Accepted: 08/23/2021] [Indexed: 01/23/2023] Open
Abstract
Wild avifauna may act as fecal source of bacterial and parasitic pathogens for other birds and mammals. Most of these pathogens have a relevant impact on human and livestock health which may cause severe disease and economic loss. In the present study, the fecal samples collected from 121 wild birds belonging to 15 species of the genera Anas, Tadorna, Fulica, Arddea, Larus, Falco, Athene, Accipiter, and Columba were submitted to bacteriological and molecular analyses to detect Brucella spp., Coxiella burnetii, Mycobacterium spp., Salmonella spp., Cryptosporidium spp., Giardia spp., and microsporidia. Four (3.3%) animals were positive for one pathogen: one Anas penelope for C. burnetii, one Larus michahellis for S. enterica serovar Coeln, and two Columba livia for Encephalitozoon hellem. Although the prevalence rates found in the present survey were quite low, the obtained results confirm that wild birds would be the a potential fecal source of bacterial and parasitic zoonotic pathogens which sometimes can also represent a severe threat for farm animals.
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Affiliation(s)
- Valentina Virginia Ebani
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 56124 Pisa, Italy; (L.G.); (F.B.); (S.P.); (A.P.); (F.M.)
- Centre for Climate Change Impact, University of Pisa, Via del Borghetto 80, 56124 Pisa, Italy
| | - Lisa Guardone
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 56124 Pisa, Italy; (L.G.); (F.B.); (S.P.); (A.P.); (F.M.)
| | - Fabrizio Bertelloni
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 56124 Pisa, Italy; (L.G.); (F.B.); (S.P.); (A.P.); (F.M.)
| | - Stefania Perrucci
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 56124 Pisa, Italy; (L.G.); (F.B.); (S.P.); (A.P.); (F.M.)
| | - Alessandro Poli
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 56124 Pisa, Italy; (L.G.); (F.B.); (S.P.); (A.P.); (F.M.)
| | - Francesca Mancianti
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 56124 Pisa, Italy; (L.G.); (F.B.); (S.P.); (A.P.); (F.M.)
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11
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Ehuwa O, Jaiswal AK, Jaiswal S. Salmonella, Food Safety and Food Handling Practices. Foods 2021; 10:907. [PMID: 33919142 PMCID: PMC8143179 DOI: 10.3390/foods10050907] [Citation(s) in RCA: 137] [Impact Index Per Article: 45.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/19/2021] [Accepted: 04/19/2021] [Indexed: 02/06/2023] Open
Abstract
Salmonellosis is the second most reported gastrointestinal disorder in the EU resulting from the consumption of Salmonella-contaminated foods. Symptoms include gastroenteritis, abdominal cramps, bloody diarrhoea, fever, myalgia, headache, nausea and vomiting. In 2018, Salmonella accounted for more than half of the numbers of foodborne outbreak illnesses reported in the EU. Salmonella contamination is mostly associated with produce such as poultry, cattle and their feeds but other products such as dried foods, infant formula, fruit and vegetable products and pets have become important. Efforts aimed at controlling Salmonella are being made. For example, legislation and measures put in place reduced the number of hospitalizations between 2014 and 2015. However, the number of hospitalizations started to increase in 2016. This calls for more stringent controls at the level of government and the private sector. Food handlers of "meat processing" and "Ready to Eat" foods play a crucial role in the spread of Salmonella. This review presents an updated overview of the global epidemiology, the relevance of official control, the disease associated with food handlers and the importance of food safety concerning salmonellosis.
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Affiliation(s)
- Olugbenga Ehuwa
- School of Food Science and Environmental Health, College of Sciences and Health, Technological University Dublin—City Campus, Central Quad, Grangegorman, D07 EWV4 Dublin, Ireland; (O.E.); (S.J.)
| | - Amit K. Jaiswal
- School of Food Science and Environmental Health, College of Sciences and Health, Technological University Dublin—City Campus, Central Quad, Grangegorman, D07 EWV4 Dublin, Ireland; (O.E.); (S.J.)
- Environmental Sustainability and Health Institute (ESHI), Technological University Dublin—City Campus, Grangegorman, D07 H6K8 Dublin, Ireland
| | - Swarna Jaiswal
- School of Food Science and Environmental Health, College of Sciences and Health, Technological University Dublin—City Campus, Central Quad, Grangegorman, D07 EWV4 Dublin, Ireland; (O.E.); (S.J.)
- Environmental Sustainability and Health Institute (ESHI), Technological University Dublin—City Campus, Grangegorman, D07 H6K8 Dublin, Ireland
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12
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Umutoni N, Jakobsen AN, Mukhatov K, Thomassen GMB, Karlsen H, Mehli L. Occurrence, diversity and temperature-dependent growth kinetics of Aeromonas spp. in lettuce. Int J Food Microbiol 2020; 335:108852. [PMID: 32932210 DOI: 10.1016/j.ijfoodmicro.2020.108852] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 08/23/2020] [Accepted: 08/25/2020] [Indexed: 11/25/2022]
Abstract
Bagged, pre-cut and prewashed lettuce products are marketed as ready to eat. This concept poses a food safety concern, due to lack of efficient hurdles to eliminate possible microbial contaminants from the fresh produce and/or the processing itself. Aeromonas spp. are potential foodborne pathogens that are frequently isolated from lettuce. High counts of, e.g., A. hydrophila have been found in retail ready-to-eat (RTE) vegetable salads. The aim of this study was to assess the general microbiological quality, the occurrence and diversity of potential human pathogenic mesophilic Aeromonas spp. of retail RTE lettuce products. Additionally, temperature-dependent growth kinetic parameters of Aerobic Plate Counts (APC) and Aeromonas spp. in one selected RTE lettuce product, rocket lettuce, were quantified by performing storage experiments at 4 °C, 8 °C and 12 °C. The Aeromonas isolates were further characterized regarding pathogenic traits and phylogenetic relationship. The overall hygienic quality of the lettuce products was unsatisfactory, as 60% of the products had an APC level higher than 7.0 log CFU/g. Presumptive Aeromonas spp. were detected in 52% of the samples, levels ranging from approximately 2.0-6.0 log CFU/g. Significantly lower counts of APC and Aeromonas spp. were found in uncut and unwashed products. Presumptive Aeromonas spp. were able to proliferate in rocket lettuce stored at 4 °C (μmax = 0.39 ± 0.06/d and μmax = 0.43 ± 0.05/d for lettuce from producers A and B, respectively), and μmax was approximately 2× higher at 8 °C and 3× higher at 12 °C. Eighty-four percent of the collected isolates were identified as A. media, based on partial gyrB sequencing. Additionally A. salmonicida and A. bestiarum were detected. The pathogenic potential in this material was high, most of the isolates harbored at least one of the toxin genes, act, ast, alt.
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Affiliation(s)
- Noelle Umutoni
- Norwegian University of Science and Technology, NTNU, 7491 Trondheim, Norway; SYNLAB Analytics & Services, dep. Rørvik. Fjordgata 8, 7900 Rørvik, Norway.
| | - Anita N Jakobsen
- Norwegian University of Science and Technology, NTNU, 7491 Trondheim, Norway
| | - Kirill Mukhatov
- Norwegian University of Science and Technology, NTNU, 7491 Trondheim, Norway
| | | | - Hanne Karlsen
- Norwegian University of Science and Technology, NTNU, 7491 Trondheim, Norway.
| | - Lisbeth Mehli
- Norwegian University of Science and Technology, NTNU, 7491 Trondheim, Norway.
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13
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Arienzo A, Murgia L, Fraudentali I, Gallo V, Angelini R, Antonini G. Microbiological Quality of Ready-to-Eat Leafy Green Salads during Shelf-Life and Home-Refrigeration. Foods 2020; 9:foods9101421. [PMID: 33049952 PMCID: PMC7601731 DOI: 10.3390/foods9101421] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 09/30/2020] [Accepted: 10/02/2020] [Indexed: 11/23/2022] Open
Abstract
The market of ready-to-eat leafy green salads is experiencing a noticeable growth in Europe. Since they are intended to be consumed without additional treatments, these ready-to-eat products are associated with a high microbiological risk. The aim of this work was to evaluate the microbiological quality and safety of ready-to-eat leafy green salads sold in widespread supermarket chains in Lazio, Italy, on the packaging date during shelf-life and during home-refrigeration. The study also aimed to determine the differences between low-, medium-, and high-cost products. Salmonella spp. and L. monocytogenes were chosen as safety indicators as specified by European regulations while total aerobic mesophilic bacteria and Escherichia coli were chosen as quality indicators as suggested by national guidelines. Analyses were performed following the ISO standards and in parallel for the evaluation of total aerobic mesophilic bacteria, with an alternative colorimetric system, the Micro Biological Survey method, in order to propose a simple, affordable and accurate alternative for testing the microbiological quality of products, especially suitable for small and medium enterprises and on-site analyses. The study revealed high, unsatisfactory, total bacterial loads in all analyzed samples on the packaging date and expiry date and a very high prevalence of Salmonella spp. (67%) regardless of the selected varieties and cost categories; L. monocytogenes was not recovered aligning with the results obtained in other studies.
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Affiliation(s)
- Alyexandra Arienzo
- Department of Science, Roma Tre University, Viale Guglielmo Marconi 446, 00146 Rome, Italy; (A.A.); (I.F.); (R.A.)
| | - Lorenza Murgia
- Interuniversity Consortium INBB National Institute of Biostructures and Biosystems, Viale delle Medaglie d’Oro, 305, 00136 Rome, Italy; (L.M.); (V.G.)
| | - Ilaria Fraudentali
- Department of Science, Roma Tre University, Viale Guglielmo Marconi 446, 00146 Rome, Italy; (A.A.); (I.F.); (R.A.)
| | - Valentina Gallo
- Interuniversity Consortium INBB National Institute of Biostructures and Biosystems, Viale delle Medaglie d’Oro, 305, 00136 Rome, Italy; (L.M.); (V.G.)
| | - Riccardo Angelini
- Department of Science, Roma Tre University, Viale Guglielmo Marconi 446, 00146 Rome, Italy; (A.A.); (I.F.); (R.A.)
| | - Giovanni Antonini
- Department of Science, Roma Tre University, Viale Guglielmo Marconi 446, 00146 Rome, Italy; (A.A.); (I.F.); (R.A.)
- Interuniversity Consortium INBB National Institute of Biostructures and Biosystems, Viale delle Medaglie d’Oro, 305, 00136 Rome, Italy; (L.M.); (V.G.)
- Correspondence:
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14
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Wan J, Lu Z, Bie X, Lv F, Zhao H. Improvement of a new selective enrichment broth for culturing
Salmonella
in ready‐to‐eat fruits and vegetables. J Food Saf 2020. [DOI: 10.1111/jfs.12817] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Jiajia Wan
- College of Food Science and Technology Nanjing Agricultural University Nanjing People's Republic of China
| | - Zhaoxin Lu
- College of Food Science and Technology Nanjing Agricultural University Nanjing People's Republic of China
| | - Xiaomei Bie
- College of Food Science and Technology Nanjing Agricultural University Nanjing People's Republic of China
| | - Fengxia Lv
- College of Food Science and Technology Nanjing Agricultural University Nanjing People's Republic of China
| | - Haizhen Zhao
- College of Food Science and Technology Nanjing Agricultural University Nanjing People's Republic of China
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15
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Yang J, Zhang Z, Zhou X, Cui Y, Shi C, Shi X. Prevalence and Characterization of Antimicrobial Resistance in Salmonella enterica Isolates from Retail Foods in Shanghai, China. Foodborne Pathog Dis 2020; 17:35-43. [DOI: 10.1089/fpd.2019.2671] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Affiliation(s)
- Jingxian Yang
- MOST-USDA Joint Research Center for Food Safety, School of Agriculture & Biology, and State Key Lab of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
| | - Zengfeng Zhang
- MOST-USDA Joint Research Center for Food Safety, School of Agriculture & Biology, and State Key Lab of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
| | - Xiujuan Zhou
- MOST-USDA Joint Research Center for Food Safety, School of Agriculture & Biology, and State Key Lab of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
| | - Yan Cui
- MOST-USDA Joint Research Center for Food Safety, School of Agriculture & Biology, and State Key Lab of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
| | - Chunlei Shi
- MOST-USDA Joint Research Center for Food Safety, School of Agriculture & Biology, and State Key Lab of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
| | - Xianming Shi
- MOST-USDA Joint Research Center for Food Safety, School of Agriculture & Biology, and State Key Lab of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
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16
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Wan J, Guo J, Lu Z, Bie X, Lv F, Zhao H. Development of a test kit for visual loop-mediated isothermal amplification of Salmonella in spiked ready-to-eat fruits and vegetables. J Microbiol Methods 2019; 169:105830. [PMID: 31891738 DOI: 10.1016/j.mimet.2019.105830] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 12/25/2019] [Accepted: 12/27/2019] [Indexed: 02/02/2023]
Abstract
The purpose of this study was to assemble two types of loop-mediated isothermal amplification (LAMP) kit that have the ability to visually detect Salmonella in ready-to-eat fruits and vegetables. The reaction results were obtained within 20-40 min after addition of DNA and can be discerned by the naked eye or an amplification plot. The stability of the LAMP wet kit was evident after multiple freezing and thawing cycles, and the one-step LAMP lyophilized kit was further evolved to allow ambient temperature transport for deployment in resource-limited settings. The cost-effective wet kit had the ability to detect minimum amounts of 1.8 CFU/ml Salmonella DNA without enrichment, while the sensitivity of the one-step LAMP lyophilized kit was only 9.8 × 103 CFU/ml. They both have good anti-interference, as they were both able to detect 2.1 × 102 CFU/ml Salmonella mixed with 106 CFU/ml four non-Salmonella strain mixture. Moreover, cucumber and lettuce that were contaminated with an initial inoculation of 1.7 CFU of Salmonella/10 g showed detection within a reaction time of 30 min after 10 h enrichment. The present research setup is a convenient and practical kit for Salmonella rapid detection that has good application prospects in food safety monitoring.
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Affiliation(s)
- Jiajia Wan
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Jianping Guo
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Zhaoxin Lu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Xiaomei Bie
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
| | - Fengxia Lv
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Haizhen Zhao
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
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17
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Machado-Moreira B, Richards K, Brennan F, Abram F, Burgess CM. Microbial Contamination of Fresh Produce: What, Where, and How? Compr Rev Food Sci Food Saf 2019; 18:1727-1750. [PMID: 33336968 DOI: 10.1111/1541-4337.12487] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 06/07/2019] [Accepted: 07/10/2019] [Indexed: 01/02/2023]
Abstract
Promotion of healthier lifestyles has led to an increase in consumption of fresh produce. Such foodstuffs may expose consumers to increased risk of foodborne disease, as often they are not subjected to processing steps to ensure effective removal or inactivation of pathogenic microorganisms before consumption. Consequently, reports of ready-to-eat fruit and vegetable related disease outbreak occurrences have increased substantially in recent years, and information regarding these events is often not readily available. Identifying the nature and source of microbial contamination of these foodstuffs is critical for developing appropriate mitigation measures to be implemented by food producers. This review aimed to identify the foodstuffs most susceptible to microbial contamination and the microorganisms responsible for disease outbreaks from information available in peer-reviewed scientific publications. A total of 571 outbreaks were identified from 1980 to 2016, accounting for 72,855 infections and 173 deaths. Contaminated leafy green vegetables were responsible for 51.7% of reported outbreaks. Contaminated soft fruits caused 27.8% of infections. Pathogenic strains of Escherichia coli and Salmonella, norovirus, and hepatitis A accounted for the majority of cases. Large outbreaks resulted in particular biases such as the observation that contaminated sprouted plants caused 31.8% of deaths. Where known, contamination mainly occurred via contaminated seeds, water, and contaminated food handlers. There is a critical need for standardized datasets regarding all aspects of disease outbreaks, including how foodstuffs are contaminated with pathogenic microorganisms. Providing food business operators with this knowledge will allow them to implement better strategies to improve safety and quality of fresh produce.
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Affiliation(s)
- Bernardino Machado-Moreira
- Teagasc Food Research Centre, Ashtown, Dublin, Ireland.,Functional Environmental Microbiology, National Univ. of Ireland Galway, Galway, Ireland
| | - Karl Richards
- Teagasc Johnstown Castle Environmental Research Centre, Wexford, Ireland
| | - Fiona Brennan
- Teagasc Johnstown Castle Environmental Research Centre, Wexford, Ireland
| | - Florence Abram
- Functional Environmental Microbiology, National Univ. of Ireland Galway, Galway, Ireland
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18
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The role of domestic reservoirs in domestically acquired Salmonella infections in Norway: epidemiology of salmonellosis, 2000-2015, and results of a national prospective case-control study, 2010-2012. Epidemiol Infect 2018; 147:e43. [PMID: 30428947 PMCID: PMC6518537 DOI: 10.1017/s0950268818002911] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In Norway, incidence of sporadic domestically acquired salmonellosis is low, and most frequently due to Salmonalla Typhimurium. We investigated the risk factors for sporadic Salmonella infections in Norway to improve control and prevention measures. Surveillance data for all Salmonella infections from 2000 to 2015 were analysed for seasonality and proportion associated with domestic reservoirs, hedgehogs and wild birds. A prospective case–control study was conducted from 2010 to 2012 by recruiting cases from the Norwegian Surveillance System for Communicable Diseases and controls from the Norwegian Population Registry (389 cases and 1500 controls). Univariable analyses using logistic regression were conducted and a multivariable model was developed using regularised/penalised logistic regression. In univariable analysis, eating snow, dirt, sand or playing in a sandbox (aOR 4.14; CI 2.15–7.97) was associated with salmonellosis. This was also the only exposure significantly associated with illness in the multivariable model. Since 2004, 34.2% (n = 354) of S. Typhimuirum cases had an MLVA profile linked to a domestic reservoir. A seasonal trend with a peak in August for all Salmonella types and in February for S. Typhimurium was observed. Indirect exposure to domestic reservoirs remains a source of salmonellosis in Norway, particularly for children. Information to the public about avoiding environmental exposure should be strengthened and initiatives to combat salmonellosis in the food chain should be reinforced.
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19
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Ziegler M, Rüegg S, Stephan R, Guldimann C. Growth potential of Listeria monocytogenes in six different RTE fruit products: impact of food matrix, storage temperature and shelf life. Ital J Food Saf 2018; 7:7581. [PMID: 30538961 PMCID: PMC6240924 DOI: 10.4081/ijfs.2018.7581] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/26/2018] [Accepted: 09/05/2018] [Indexed: 12/29/2022] Open
Abstract
We tested the growth potential of Listeria monocytogenes on six RTE fruit products at low (4°C at the factory followed by 8°C retail/home storage) and abusive (4°C followed by 12°C) storage temperatures. Sliced coconut and fresh cut cantaloupe, as well as a fruit mix containing diced pineapple, cantaloupe, apples and grapes supported the growth of L. monocytogenes with a growth potential δ>0.5 log CFU/g over six days. Mangoes, a mix of diced kiwi, cantaloupe and pineapple as well as a mix of diced pineapple, mango, grapefruit, kiwi and pomegranate did not support a growth potential that exceeded 0.5 log CFU/g over six days. The growth potential of L. monocytogenes correlated significantly with the pH; no product with a pH below 4 showed a significant growth potential of L. monocytogenes. Time after inoculation was also a significant predictor of the growth potential, while the fruit type and storage temperature were not.
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Affiliation(s)
| | - Simon Rüegg
- Section of Epidemiology, Vetsuisse Faculty, University of Zürich, Switzerland
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20
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Mogren L, Windstam S, Boqvist S, Vågsholm I, Söderqvist K, Rosberg AK, Lindén J, Mulaosmanovic E, Karlsson M, Uhlig E, Håkansson Å, Alsanius B. The Hurdle Approach-A Holistic Concept for Controlling Food Safety Risks Associated With Pathogenic Bacterial Contamination of Leafy Green Vegetables. A Review. Front Microbiol 2018; 9:1965. [PMID: 30197634 PMCID: PMC6117429 DOI: 10.3389/fmicb.2018.01965] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 08/02/2018] [Indexed: 01/24/2023] Open
Abstract
Consumers appreciate leafy green vegetables such as baby leaves for their convenience and wholesomeness and for adding a variety of tastes and colors to their plate. In Western cuisine, leafy green vegetables are usually eaten fresh and raw, with no step in the long chain from seed to consumption where potentially harmful microorganisms could be completely eliminated, e.g., through heating. A concerning trend in recent years is disease outbreaks caused by various leafy vegetable crops and one of the most important foodborne pathogens in this context is Shiga toxin-producing Escherichia coli (STEC). Other pathogens such as Salmonella, Shigella, Yersinia enterocolitica and Listeria monocytogenes should also be considered in disease risk analysis, as they have been implicated in outbreaks associated with leafy greens. These pathogens may enter the horticultural value network during primary production in field or greenhouse via irrigation, at harvest, during processing and distribution or in the home kitchen/restaurant. The hurdle approach involves combining several mitigating approaches, each of which is insufficient on its own, to control or even eliminate pathogens in food products. Since the food chain system for leafy green vegetables contains no absolute kill step for pathogens, use of hurdles at critical points could enable control of pathogens that pose a human health risk. Hurdles should be combined so as to decrease the risk due to pathogenic microbes and also to improve microbial stability, shelf-life, nutritional properties and sensory quality of leafy vegetables. The hurdle toolbox includes different options, such as physical, physiochemical and microbial hurdles. The goal for leafy green vegetables is multi-target preservation through intelligently applied hurdles. This review describes hurdles that could be used for leafy green vegetables and their biological basis, and identifies prospective hurdles that need attention in future research.
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Affiliation(s)
- Lars Mogren
- Microbial Horticulture, Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Sofia Windstam
- Microbial Horticulture, Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Alnarp, Sweden
- Department of Biological Sciences, SUNY Oswego, Oswego, NY, United States
| | - Sofia Boqvist
- Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Ivar Vågsholm
- Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Karin Söderqvist
- Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Anna K. Rosberg
- Microbial Horticulture, Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Julia Lindén
- Microbial Horticulture, Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Emina Mulaosmanovic
- Microbial Horticulture, Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Maria Karlsson
- Microbial Horticulture, Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Elisabeth Uhlig
- Department of Food Technology, Engineering and Nutrition, Lund University, Lund, Sweden
| | - Åsa Håkansson
- Department of Food Technology, Engineering and Nutrition, Lund University, Lund, Sweden
| | - Beatrix Alsanius
- Microbial Horticulture, Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Alnarp, Sweden
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21
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Lamas A, Regal P, Vázquez B, Miranda JM, Cepeda A, Franco CM. Salmonella and Campylobacter biofilm formation: a comparative assessment from farm to fork. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:4014-4032. [PMID: 29424050 DOI: 10.1002/jsfa.8945] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 01/16/2018] [Accepted: 02/02/2018] [Indexed: 06/08/2023]
Abstract
It takes several steps to bring food from the farm to the fork (dining table), and contamination with food-borne pathogens can occur at any point in the process. Campylobacter spp. and Salmonella spp. are the main microorganisms responsible for foodborne disease in the EU. These two pathogens are able to persist throughout the food supply chain thanks to their ability to form biofilms. Owing to the high prevalence of Salmonella and especially of Campylobacter in the food supply chain and the huge efforts of food authorities to reduce these levels, it is of great importance to fully understand their mechanisms of persistence. Diverse studies have evaluated the biofilm-forming capacity of foodborne pathogens isolated at different steps of food production. Nonetheless, the principal obstacle of these studies is to reproduce the real conditions that microorganisms encounter in the food supply chain. While there are a wide number of Salmonella biofilm studies, information on Campylobacter biofilms is still limited. A comparison between the two microorganisms could help to develop new research in the field of Campylobacter biofilms. Therefore, this review evaluates relevant work in the field of Salmonella and Campylobacter biofilms and the applicability of the data obtained from these studies to real working conditions. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Alexandre Lamas
- Laboratorio de Higiene Inspección y Control de Alimentos, Departamento de Química Analítica, Nutrición y Bromatología, Universidad de Santiago de Compostela, Lugo, Spain
| | - Patricia Regal
- Laboratorio de Higiene Inspección y Control de Alimentos, Departamento de Química Analítica, Nutrición y Bromatología, Universidad de Santiago de Compostela, Lugo, Spain
| | - Beatriz Vázquez
- Laboratorio de Higiene Inspección y Control de Alimentos, Departamento de Química Analítica, Nutrición y Bromatología, Universidad de Santiago de Compostela, Lugo, Spain
| | - José M Miranda
- Laboratorio de Higiene Inspección y Control de Alimentos, Departamento de Química Analítica, Nutrición y Bromatología, Universidad de Santiago de Compostela, Lugo, Spain
| | - Alberto Cepeda
- Laboratorio de Higiene Inspección y Control de Alimentos, Departamento de Química Analítica, Nutrición y Bromatología, Universidad de Santiago de Compostela, Lugo, Spain
| | - Carlos M Franco
- Laboratorio de Higiene Inspección y Control de Alimentos, Departamento de Química Analítica, Nutrición y Bromatología, Universidad de Santiago de Compostela, Lugo, Spain
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22
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Silveira LO, do Rosário DKA, Giori ACG, Oliveira SBS, da Silva Mutz Y, Marques CS, Coelho JM, Bernardes PC. Combination of peracetic acid and ultrasound reduces Salmonella Typhimurium on fresh lettuce ( Lactuca sativa L. var. crispa). Journal of Food Science and Technology 2018; 55:1535-1540. [PMID: 29606768 DOI: 10.1007/s13197-018-3071-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 01/26/2018] [Accepted: 02/12/2018] [Indexed: 10/18/2022]
Abstract
Salmonella outbreaks related to fruits and vegetables have been reported being lettuce one of the most contaminated. Peracetic acid (PA) at 50 mg/L, sodium dichloroisocyanurate (SD) at 100 mg/L, and the combination of SD at 100 mg/L and babaçu coconut (Attalea speciosa) oil detergent at 100 mg/L were applied to fresh lettuce. Natural contaminant microbiota, physicochemical characteristics, and sensory attributes were evaluated. PA and SD reduced mesophilic aerobic counts by 2.1 and 1.5 log cfu/g, respectively. The most efficient treatment in reducing natural microbiota (i.e., PA) was applied alone and in combination with ultrasound (US). It reduced Salmonella enterica Typhimurium counts to undetectable levels (< 1 log cfu/g). US further reduced S. Typhimurium counts by 0.6 log cfu/g in relation to PA, treatment which lessened the pH but increased the titratable acidity of lettuce, but did not cause total color difference. Therefore, the combination of PA and US holds a potential industrial application for sanitization purposes.
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Affiliation(s)
- Luiza Oliveira Silveira
- 1Departamento de Engenharia de Alimentos, Universidade Federal do Espírito Santo, Alto Universitário, s/n, Alegre, ES 29500-000 Brazil
| | - Denes Kaic Alves do Rosário
- 2Programa de Ciência de Alimentos, Instituto de Química, Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos 149, Cidade Universitária, Rio de Janeiro, RJ 21941-909 Brazil
| | - Ana Carolina Garcia Giori
- 1Departamento de Engenharia de Alimentos, Universidade Federal do Espírito Santo, Alto Universitário, s/n, Alegre, ES 29500-000 Brazil
| | - Syllas Borburema Silva Oliveira
- 1Departamento de Engenharia de Alimentos, Universidade Federal do Espírito Santo, Alto Universitário, s/n, Alegre, ES 29500-000 Brazil
| | - Yhan da Silva Mutz
- 1Departamento de Engenharia de Alimentos, Universidade Federal do Espírito Santo, Alto Universitário, s/n, Alegre, ES 29500-000 Brazil
| | - Clara Suprani Marques
- 1Departamento de Engenharia de Alimentos, Universidade Federal do Espírito Santo, Alto Universitário, s/n, Alegre, ES 29500-000 Brazil
| | - Jussara Moreira Coelho
- 1Departamento de Engenharia de Alimentos, Universidade Federal do Espírito Santo, Alto Universitário, s/n, Alegre, ES 29500-000 Brazil
| | - Patrícia Campos Bernardes
- 1Departamento de Engenharia de Alimentos, Universidade Federal do Espírito Santo, Alto Universitário, s/n, Alegre, ES 29500-000 Brazil
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23
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Silberbauer A, Schmid M. Packaging Concepts for Ready-to-Eat Food: Recent Progress. ACTA ACUST UNITED AC 2017. [DOI: 10.1007/s41783-017-0019-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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24
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Paz-Méndez AM, Lamas A, Vázquez B, Miranda JM, Cepeda A, Franco CM. Effect of Food Residues in Biofilm Formation on Stainless Steel and Polystyrene Surfaces by Salmonella enterica Strains Isolated from Poultry Houses. Foods 2017; 6:E106. [PMID: 29186017 PMCID: PMC5742774 DOI: 10.3390/foods6120106] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 11/26/2017] [Accepted: 11/27/2017] [Indexed: 12/13/2022] Open
Abstract
Salmonella spp. is a major food-borne pathogen around the world. The ability of Salmonella to produce biofilm is one of the main obstacles in reducing the prevalence of these bacteria in the food chain. Most of Salmonella biofilm studies found in the literature used laboratory growth media. However, in the food chain, food residues are the principal source of nutrients of Salmonella. In this study, the biofilm formation, morphotype, and motility of 13 Salmonella strains belonging to three different subspecies and isolated from poultry houses was evaluated. To simulate food chain conditions, four different growth media (Tryptic Soy Broth at 1/20 dilution, milk at 1/20 dilution, tomato juice, and chicken meat juice), two different surfaces (stainless steel and polystyrene) and two temperatures (6 °C and 22 °C) were used to evaluate the biofilm formation. The morphotype, motility, and biofilm formation of Salmonella was temperature-dependent. Biofilm formation was significantly higher with 1/20 Tryptic Soy Broth in all the surfaces and temperatures tested, in comparison with the other growth media. The laboratory growth medium 1/20 Tryptic Soy Broth enhanced biofilm formation in Salmonella. This could explain the great differences in biofilm formation found between this growth medium and food residues. However, Salmonella strains were able to produce biofilm on the presence of food residues in all the conditions tested. Therefore, the Salmonella strain can use food residues to produce biofilm on common surfaces of the food chain. More studies combining more strains and food residues are necessary to fully understand the mechanism used by Salmonella to produce biofilm on the presence of these sources of nutrients.
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Affiliation(s)
- Alba María Paz-Méndez
- Laboratorio de Higiene, Inspección y Control de Alimentos, Dpto. de Química Analítica, Nutrición y Bromatología, Universidad de Santiago de Compostela, 27002 Lugo, Spain.
| | - Alexandre Lamas
- Laboratorio de Higiene, Inspección y Control de Alimentos, Dpto. de Química Analítica, Nutrición y Bromatología, Universidad de Santiago de Compostela, 27002 Lugo, Spain.
| | - Beatriz Vázquez
- Laboratorio de Higiene, Inspección y Control de Alimentos, Dpto. de Química Analítica, Nutrición y Bromatología, Universidad de Santiago de Compostela, 27002 Lugo, Spain.
| | - José Manuel Miranda
- Laboratorio de Higiene, Inspección y Control de Alimentos, Dpto. de Química Analítica, Nutrición y Bromatología, Universidad de Santiago de Compostela, 27002 Lugo, Spain.
| | - Alberto Cepeda
- Laboratorio de Higiene, Inspección y Control de Alimentos, Dpto. de Química Analítica, Nutrición y Bromatología, Universidad de Santiago de Compostela, 27002 Lugo, Spain.
| | - Carlos Manuel Franco
- Laboratorio de Higiene, Inspección y Control de Alimentos, Dpto. de Química Analítica, Nutrición y Bromatología, Universidad de Santiago de Compostela, 27002 Lugo, Spain.
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