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Fehrenbach GW, Murphy E, Pogue R, Carter F, Clifford E, Major I. Comprehensive analysis and assessment of exposure to enteric viruses and bacteria in shellfish. MARINE ENVIRONMENTAL RESEARCH 2024; 196:106404. [PMID: 38341981 DOI: 10.1016/j.marenvres.2024.106404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/30/2024] [Accepted: 02/07/2024] [Indexed: 02/13/2024]
Abstract
Shellfish species, including oysters, clams, and mussels, are extensively cultured in coastal waters. Its location is determined by factors such as nutrient availability, water temperature, tidal cycle, and the presence of contaminants such as Escherichia coli and enteric viruses. With the expansion and intensification of human activities at vicinities, the presence of anthropogenic contaminants has increased, threatening shellfish farms and consumer safety give the prevalent consumption of raw shellfish. This literature review aims to provide a comprehensive analysis of the dietary exposure and assess the risk associated with enteric viruses and bacteria detected in shellfish. The predominant bacteria and viruses detected in shellfish are reported, and the potential interrelation is discussed. The main characteristics of each contaminant and shellfish were reviewed for a more comprehensive understanding. To facilitate a direct estimation of exposure, the estimated daily intake (EDI) of bacteria was calculated based on the average levels of E. coli in shellfish, as reported in the literature. The mean daily ingestion of seafood in each of the five continents was considered. Asia exhibited the highest intake of contaminants, with an average of ±5.6 E. coli units/day.kg body weight in cockles. Simulations were conducted using recommended shellfish consumption levels established by state agencies, revealing significantly lower (p < 0.01) EDI for all continents compared to estimations based on recommended levels. This indicates a higher risk associated with healthy shellfish ingestion, potentially leading to increased intoxication incidents with a change in dietary habits. To promote a healthier lifestyle through increased shellfish consumptions, it is imperative to reduce the exposure of shellfish species to bacteria and enteric viruses. The conventional use of E. coli as the sole indicator for consumption safety and water quality in shellfish farms has been deemed insufficient. Instances where shellfish met E. coli limits established by state agencies were often found to be contaminated with human enteric viruses. Therefore, a holistic approach considering the entire production chain is necessary to support the shellfish industry and ensure food safety.
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Affiliation(s)
- Gustavo Waltzer Fehrenbach
- Materials Research Institute, Technological University of the Shannon, Midlands Campus, N37 HD68, Athlone, Ireland.
| | - Emma Murphy
- Materials Research Institute, Technological University of the Shannon, Midlands Campus, N37 HD68, Athlone, Ireland; LIFE - Health and Biosciences Research Institute, Technological University of the Shannon, Midwest Campus, V94 EC5T, Limerick, Ireland
| | - Robert Pogue
- Post-Graduate Program in Genomic Sciences and Biotechnology, Catholic University of Brasilia, 71966-700, Brasilia, Brazil
| | - Frank Carter
- Coney Island Shellfish Ltd., F91 YH56, Sligo, Ireland
| | - Eoghan Clifford
- School of Engineering, National University of Ireland Galway, H91 HX31, Galway, Ireland; Ryan Institute, National University of Ireland Galway, H91 HX31, Galway, Ireland
| | - Ian Major
- Materials Research Institute, Technological University of the Shannon, Midlands Campus, N37 HD68, Athlone, Ireland
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Di Maro O, Proroga YT, Castellano S, Balestrieri A, Capuano F, Arletti E, Vietina M, Bizzarri M, Murru N, Peruzy MF, Cristiano D. Detection of pathogenic Vibrio spp. in foods: polymerase chain reaction-based screening strategy to rapidly detect pathogenic Vibrio parahaemolyticus, Vibrio cholerae, and Vibrio vulnificus in bivalve mollusks and preliminary results. Ital J Food Saf 2024; 13:11635. [PMID: 38623280 PMCID: PMC11017957 DOI: 10.4081/ijfs.2024.11635] [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: 08/03/2023] [Accepted: 01/09/2023] [Indexed: 04/17/2024] Open
Abstract
The majority of human diseases attributed to seafood are caused by Vibrio spp., and the most commonly reported species are Vibrio parahaemolyticus, Vibrio vulnificus, and Vibrio cholerae. The conventional methods for the detection of Vibrio species involve the use of selective media, which are inexpensive and simple but time-consuming. The present work aimed to develop a rapid method based on the use of multiplex real-time polymerase chain reaction (PCR) to detect V. parahaemolyticus, V. vulnificus, and V. cholerae in bivalve mollusks. 30 aliquots of bivalve mollusks (Mytilus galloprovincialis) were experimentally inoculated with two levels of V. parahaemolyticus, V. vulnificus, and V. cholerae. ISO 21872-1:2017 was used in parallel for qualitative analysis. The limit of detection of 50% was 7.67 CFU/g for V. cholerae, 0.024 CFU/g for V. vulnificus, and 1.36 CFU/g for V. parahaemolyticus. For V. vulnificus and V. cholerae, the real-time PCR protocol was demonstrated to amplify the pathogens in samples seeded with the lowest and highest levels. The molecular method evaluated showed a concordance rate of 100% with the reference microbiological method. V. parahaemolyticus was never detected in samples contaminated with the lowest level, and it was detected in 14 samples (93.33%) seeded with the highest concentration. In conclusion, the developed multiplex real-time PCR proved to be reliable for V. vulnificus and V. cholerae. Results for V. parahaemolyticus are promising, but further analysis is needed. The proposed method could represent a quick monitoring tool and, if used, would allow the implementation of food safety.
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Affiliation(s)
- Orlandina Di Maro
- Department of Food Inspection, Experimental Zooprophylactic Institute of Southern Italy, Portici
| | - Yolande T.R. Proroga
- Department of Food Inspection, Experimental Zooprophylactic Institute of Southern Italy, Portici
| | - Silvia Castellano
- Department of Food Inspection, Experimental Zooprophylactic Institute of Southern Italy, Portici
| | - Anna Balestrieri
- Department of Food Inspection, Experimental Zooprophylactic Institute of Southern Italy, Portici
| | - Federico Capuano
- Department of Food Inspection, Experimental Zooprophylactic Institute of Southern Italy, Portici
| | | | | | | | - Nicoletta Murru
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Italy
| | - Maria Francesca Peruzy
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Italy
| | - Daniela Cristiano
- Department of Food Inspection, Experimental Zooprophylactic Institute of Southern Italy, Portici
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Mudadu AG, Spanu C, Salza S, Piras G, Uda MT, Giagnoni L, Fois G, Pereira JG, Pantoja JCF, Virgilio S, Tedde T. Association between rainfall and Escherichia coli in live bivalve molluscs harvested in Sardinia, Italy. Food Res Int 2023; 174:113563. [PMID: 37986518 DOI: 10.1016/j.foodres.2023.113563] [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: 08/03/2023] [Revised: 10/06/2023] [Accepted: 10/09/2023] [Indexed: 11/22/2023]
Abstract
Rainfall is generally accepted as one of the most important factors associated with an increased level of E. coli in bivalve molluscs. Performing microbiological risk assessment is relevant to official control authorities to determine the sanitary status of harvesting areas and, therefore, develop monitoring strategies and identify management practices that could be used to improve the quality and safety of the final product. The present study aimed to investigate the impact of rainfall on the content of E. coli in bivalve molluscs farmed in Sardinia (Italy). Enumeration of E. coli was performed according to the Most Probable Number (MPN) method (ISO 16649-3) on 1,920 bivalve samples collected from 7 regional counties between 2018 and 2020. Bivalve molluscs samples included 955 mussels (Mytilus galloprovincialis), 500 oysters (Crassostrea gigas), 325 clams (Ruditapes decussatus), 94 warty venus (Venus verrucosa), and 46 lagoon cockles (Cerastoderma glaucum). Rainfall data were obtained by the Department of Meteorology of the ARPA Sardegna. For each sampling site, GPS coordinates were used to identify gauge stations within catchment areas. Cumulative rain (mm) was recorded 1, 3, 5, 7, and 15 days before sampling, among which the 7-day cumulative rain was the strongest predictor of E. coli counts. Several thresholds of 7-day cumulative rain (from <10 mm up to >300 mm) before sampling were used to estimate the chances of a non-compliant sample (E. coli levels above the limit for sanitary class A; 230 MPN/100 g). The 7-day cumulative rain was positively associated with the chances of non-compliance. When the 7-day cumulative rain before sampling was >300 mm, 80.5 % of the samples were non-compliant, and the odds of a non-compliant sample were 23.6 times higher, as compared to samples harvested when the 7-day cumulative rainfall was <10 mm. Precipitation data could be a useful tool for interpreting anomalous results from official control authorities and reduce the costs that originate from closure of production areas.
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Affiliation(s)
- A G Mudadu
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, Sassari 07100, Italy
| | - C Spanu
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy.
| | - S Salza
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, Sassari 07100, Italy
| | - G Piras
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, Sassari 07100, Italy
| | - M T Uda
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, Sassari 07100, Italy
| | - L Giagnoni
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - G Fois
- Meteorological, Agrometeorological and Ecosystem Service of the Regional Environment Protection Agency of Sardinia (ARPAS), Viale Porto Torres 119, 07100 Sassari, Italy
| | - J G Pereira
- Department of Animal Production and Preventive Veterinary Medicine, São Paulo State University (UNESP), Rua Prof. Walter Mauricio Correia SN, Rubião Jr., Botucatu, SP 18618-681, Brazil
| | - J C F Pantoja
- Department of Animal Production and Preventive Veterinary Medicine, São Paulo State University (UNESP), Rua Prof. Walter Mauricio Correia SN, Rubião Jr., Botucatu, SP 18618-681, Brazil
| | - S Virgilio
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, Sassari 07100, Italy
| | - T Tedde
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, Sassari 07100, Italy
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Tedde G, Lorenzoni G, Meloni D, Salza S, Melillo R, Bazzardi R, Cau S, Tedde T, Piras G, Uda MT, Leoni F, Esposito G, Virgilio S, Mudadu AG. Trend of Pathogenic Vibrio parahaemolyticus Occurrences in Bivalve Molluscs Harvested in Sardinian Coastal Environments Between 2011 and 2018. J Food Prot 2023; 86:100150. [PMID: 37634810 DOI: 10.1016/j.jfp.2023.100150] [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: 02/28/2023] [Revised: 07/22/2023] [Accepted: 08/22/2023] [Indexed: 08/29/2023]
Abstract
The aim of the present study was to evaluate Vibrio parahaemolyticus occurrences in bivalve molluscs harvested from Sardinian coastal environments between 2013 and 2015. The prevalence of pathogenic V. parahaemolyticus isolates is based on the detection of the two major virulence genes thermostable direct hemolysin (tdh) and thermolabile hemolysin (trh) To assess changes between 2011 and 2018 in the prevalence of V. parahaemolyticus in bivalve molluscs, we compared our results with those of previous investigations. In total, 2,933 samples were collected: 1,079 in 2013, 1,288 in 2014, and 566 in 2015. The mean prevalence of V. parahaemolyticus in shellfish was 3.5% in 2013, 1.7% in 2014, and 3.5% in 2015. The highest percentage of positive samples in 2013 and 2014 was observed in clams (3.5% and 2.7%, respectively), whereas in 2015, it was reported in oysters (15.1%). By comparing the sampling period of 2011-2014 with that of 2015-2018, an increase in the prevalence of V. parahaemolyticus was observed in shellfish (p < 0.05). In parallel, 208 potentially enteropathogenic V. parahaemolyticus strains were identified through the years 2011-2018 and, in particular, 10 trh+ and six tdh+ isolates. Our present study provides information regarding trends of V. parahaemolyticus occurrences in bivalve molluscs harvested from Sardinian coastal environments between 2011 and 2018 suggesting that the prevalence varies depending on the sampling period and shellfish species.
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Affiliation(s)
- Giuseppe Tedde
- Istituto Zooprofilattico Sperimentale Della Sardegna, Struttura Complessa di Microbiologia e Ispezione Degli Alimenti di Origine Animale, Via Duca Degli Abruzzi 8, 07100 Sassari, Italy
| | - Giuseppa Lorenzoni
- Istituto Zooprofilattico Sperimentale Della Sardegna, Struttura Complessa di Microbiologia e Ispezione Degli Alimenti di Origine Animale, Via Duca Degli Abruzzi 8, 07100 Sassari, Italy
| | - Domenico Meloni
- Dipartimento di Medicina Veterinaria, Università Degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy.
| | - Sara Salza
- Istituto Zooprofilattico Sperimentale Della Sardegna, Struttura Complessa di Microbiologia e Ispezione Degli Alimenti di Origine Animale, Via Duca Degli Abruzzi 8, 07100 Sassari, Italy
| | - Rita Melillo
- Istituto Zooprofilattico Sperimentale Della Sardegna, Struttura Complessa di Microbiologia e Ispezione Degli Alimenti di Origine Animale, Via Duca Degli Abruzzi 8, 07100 Sassari, Italy
| | - Riccardo Bazzardi
- Istituto Zooprofilattico Sperimentale Della Sardegna, Struttura Complessa di Microbiologia e Ispezione Degli Alimenti di Origine Animale, Via Duca Degli Abruzzi 8, 07100 Sassari, Italy
| | - Simona Cau
- Istituto Zooprofilattico Sperimentale Della Sardegna, Struttura Complessa di Microbiologia e Ispezione Degli Alimenti di Origine Animale, Via Duca Degli Abruzzi 8, 07100 Sassari, Italy
| | - Tiziana Tedde
- Istituto Zooprofilattico Sperimentale Della Sardegna, Struttura Complessa di Microbiologia e Ispezione Degli Alimenti di Origine Animale, Via Duca Degli Abruzzi 8, 07100 Sassari, Italy
| | - Gabriella Piras
- Istituto Zooprofilattico Sperimentale Della Sardegna, Struttura Complessa di Microbiologia e Ispezione Degli Alimenti di Origine Animale, Via Duca Degli Abruzzi 8, 07100 Sassari, Italy
| | - Maria Teresa Uda
- Istituto Zooprofilattico Sperimentale Della Sardegna, Struttura Complessa di Microbiologia e Ispezione Degli Alimenti di Origine Animale, Via Duca Degli Abruzzi 8, 07100 Sassari, Italy
| | - Francesca Leoni
- Istituto Zooprofilattico Sperimentale dell'Umbria e Delle Marche, LNR per le Contaminazioni Batteriologiche dei Molluschi Bivalvi, Sezione di Ancona, Via Cupa di Posatora 3, 60131 Ancona, Italy
| | - Giuseppe Esposito
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154 Torino, Italy
| | - Sebastiano Virgilio
- Istituto Zooprofilattico Sperimentale Della Sardegna, Struttura Complessa di Microbiologia e Ispezione Degli Alimenti di Origine Animale, Via Duca Degli Abruzzi 8, 07100 Sassari, Italy
| | - Alessandro Graziano Mudadu
- Istituto Zooprofilattico Sperimentale Della Sardegna, Struttura Complessa di Microbiologia e Ispezione Degli Alimenti di Origine Animale, Via Duca Degli Abruzzi 8, 07100 Sassari, Italy
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5
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Mudadu A, Spanu C, Pantoja J, Dos Santos M, De Oliveira C, Salza S, Piras G, Uda M, Virgilio S, Giagnoni L, Pereira J, Tedde T. Association between Escherichia coli and Salmonella spp. food safety criteria in live bivalve molluscs from wholesale and retail markets. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.108942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Zahli R, Soliveri J, Abrini J, Copa-Patiño JL, Nadia A, Scheu AK, Nadia SS. Prevalence, typing and antimicrobial resistance of Salmonella isolates from commercial shellfish in the North coast of Morocco. World J Microbiol Biotechnol 2021; 37:170. [PMID: 34487261 DOI: 10.1007/s11274-021-03136-w] [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: 04/19/2021] [Accepted: 08/26/2021] [Indexed: 10/20/2022]
Abstract
Salmonellosis is one of the most common foodborne illnesses in the world. The irrational use of antibiotics in medicine and in animal nutrition has greatly favored the emergence and spread of resistant strains of non-typhoid Salmonella. This study aims the determination of the prevalence of Salmonella in bivalve mollusks in Northern Morocco, as well as the molecular typing and antibiotic susceptibility testing of the strains isolated from positive samples. In total, 150 samples from shellfish composed of mussels (Mytilus galloprovincialis), clams (Callista chione and Ruditapes descussatus) and oysters (Magallana gigas). Isolated Salmonella were characterized by Molecular techniques PCR, MLST and MLVA, phylogenetically grouped by MLSA, and susceptibilities were determined for 30 antimicrobial drugs using microdilution method by the BD Phoenix Automated Microbiology System. Prevalence of Salmonella enterica subsp. enterica was 12.67%, grouped in four serovars identified as Chester, Hadar, Typhimurium and Kentucky. Five different MLST STs (sequence types) were detected, ST1954 being the most common, which was mostly found in Chester isolates. Forty-two percent of the isolates showed resistance to more than one antibiotic, especially trimethoprim, sulfa drugs, quinolones and β-lactam. There was a marked change in the serovars and antimicrobial resistance profiles of the Salmonella isolates in this study compared to those in previous studies.
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Affiliation(s)
- Rajae Zahli
- Biotechnology and Applied Microbiology Laboratory (BMA), Department of Biology, Abdelmalek Essadi University, Tétouan, Morocco.
| | - Juan Soliveri
- Department of Biomedicine and Biotechnology, Faculty of Farmacy, University of Alcalá, 28805, Madrid, Spain
| | - Jamal Abrini
- Biotechnology and Applied Microbiology Laboratory (BMA), Department of Biology, Abdelmalek Essadi University, Tétouan, Morocco
| | - José L Copa-Patiño
- Department of Biomedicine and Biotechnology, Faculty of Farmacy, University of Alcalá, 28805, Madrid, Spain
| | - Amajoud Nadia
- Regional Environmental Laboratory of the Urban Community of Tetouan, Tétouan, Morocco
| | - Ann-Karolin Scheu
- Department of Biomedicine and Biotechnology, Faculty of Farmacy, University of Alcalá, 28805, Madrid, Spain
| | - Skali Senhaji Nadia
- Biotechnology and Applied Microbiology Laboratory (BMA), Department of Biology, Abdelmalek Essadi University, Tétouan, Morocco
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Lorenzoni G, Tedde G, Mara L, Bazzoni AM, Esposito G, Salza S, Piras G, Tedde T, Bazzardi R, Arras I, Uda MT, Virgilio S, Meloni D, Mudadu AG. Presence, Seasonal Distribution, and Biomolecular Characterization of Vibrio parahaemolyticus and Vibrio vulnificus in Shellfish Harvested and Marketed in Sardinia (Italy) between 2017 and 2018. J Food Prot 2021; 84:1549-1554. [PMID: 33956961 DOI: 10.4315/jfp-21-059] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 05/01/2021] [Indexed: 02/07/2023]
Abstract
ABSTRACT In the present study, we investigated the presence, seasonal distribution, and biomolecular characteristics of Vibrio parahaemolyticus and Vibrio vulnificus in samples of bivalve mollusks (Mytilus galloprovincialis, Crassostrea gigas, and Ruditapes decussatus) harvested and marketed in Sardinia (Italy) between 2017 and 2018. A total of 435 samples were submitted for qualitative determination of Vibrio spp., V. parahaemolyticus, and V. vulnificus. Potentially enteropathogenic isolates were detected with biomolecular methods. The overall prevalence of Vibrio spp. was 7.6%. The highest Vibrio prevalence was found in R. decussatus (8.3%). The prevalences of V. parahaemolyticus and V. vulnificus were 2.7 and 4.8%, respectively. Higher prevalences of V. parahaemolyticus and V. vulnificus were found in R. decussatus (4.2%) and C. gigas (6.2%), respectively. Only two pathogenic V. parahaemolyticus strains were recovered (genotypes: tdh- and trh+; tdh+ and trh-), both from M. galloprovincialis. None of the isolates were tdh+ and trh+. Pathogenic Vibrio infections are often underestimated, and human infections are increasing in Europe. European data on the true distribution of Vibrionaceae are scarce, and the results of the present study highlight the need of constant monitoring to update the distribution of pathogenic vibrios. HIGHLIGHTS
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Affiliation(s)
- Giuseppa Lorenzoni
- Istituto Zooprofilattico Sperimentale della Sardegna, Struttura Complessa di Microbiologia e Ispezione degli Alimenti di Origine Animale, Via Duca degli Abruzzi 8, 07100 Sassari, Italy
| | - Giuseppe Tedde
- Istituto Zooprofilattico Sperimentale della Sardegna, Struttura Complessa di Microbiologia e Ispezione degli Alimenti di Origine Animale, Via Duca degli Abruzzi 8, 07100 Sassari, Italy
| | - Laura Mara
- Istituto Zooprofilattico Sperimentale della Sardegna, Struttura Complessa di Microbiologia e Ispezione degli Alimenti di Origine Animale, Via Duca degli Abruzzi 8, 07100 Sassari, Italy
| | - Anna Maria Bazzoni
- Agenzia Regionale per la Protezione dell'Ambiente della Sardegna, Via Rockefeller 58/60, 07100 Sassari, Italy
| | - Giuseppe Esposito
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Sara Salza
- Istituto Zooprofilattico Sperimentale della Sardegna, Struttura Complessa di Microbiologia e Ispezione degli Alimenti di Origine Animale, Via Duca degli Abruzzi 8, 07100 Sassari, Italy
| | - Gabriella Piras
- Istituto Zooprofilattico Sperimentale della Sardegna, Struttura Complessa di Microbiologia e Ispezione degli Alimenti di Origine Animale, Via Duca degli Abruzzi 8, 07100 Sassari, Italy
| | - Tiziana Tedde
- Istituto Zooprofilattico Sperimentale della Sardegna, Struttura Complessa di Microbiologia e Ispezione degli Alimenti di Origine Animale, Via Duca degli Abruzzi 8, 07100 Sassari, Italy
| | - Riccardo Bazzardi
- Istituto Zooprofilattico Sperimentale della Sardegna, Struttura Complessa di Microbiologia e Ispezione degli Alimenti di Origine Animale, Via Duca degli Abruzzi 8, 07100 Sassari, Italy
| | - Igor Arras
- Istituto Zooprofilattico Sperimentale della Sardegna, Struttura Complessa di Microbiologia e Ispezione degli Alimenti di Origine Animale, Via Duca degli Abruzzi 8, 07100 Sassari, Italy
| | - Maria Teresa Uda
- Istituto Zooprofilattico Sperimentale della Sardegna, Struttura Complessa di Microbiologia e Ispezione degli Alimenti di Origine Animale, Via Duca degli Abruzzi 8, 07100 Sassari, Italy
| | - Sebastiano Virgilio
- Istituto Zooprofilattico Sperimentale della Sardegna, Struttura Complessa di Microbiologia e Ispezione degli Alimenti di Origine Animale, Via Duca degli Abruzzi 8, 07100 Sassari, Italy
| | - Domenico Meloni
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Alessandro Graziano Mudadu
- Istituto Zooprofilattico Sperimentale della Sardegna, Struttura Complessa di Microbiologia e Ispezione degli Alimenti di Origine Animale, Via Duca degli Abruzzi 8, 07100 Sassari, Italy
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Lamon S, Piras F, Meloni D, Agus V, Porcheddu G, Pes M, Cambula MG, Esposito G, Fois F, Consolati SG, Mureddu A. Enumeration of Escherichia coli and determination of Salmonella spp. and verotoxigenic Escherichia coli in shellfish ( Mytilus galloprovincialis and Ruditapes decussatus) harvested in Sardinia, Italy. Ital J Food Saf 2020; 9:8625. [PMID: 33324586 PMCID: PMC7731884 DOI: 10.4081/ijfs.2020.8625] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 02/04/2020] [Indexed: 12/02/2022] Open
Abstract
The aim of the present study was to evaluate the occurrence of Salmonella spp., Verotoxigenic E. Coli (VTEC) and enumerate E. coli in shellfish (Mytilus galloprovincialis and Ruditapes decussatus) collected before and after depuration from two class B harvesting areas located in Sardinia (Italy). All the samples were analyzed for Salmonella spp. detection according to European Commission Regulation (EC) 2073/2005 and examined using the five tube Most-Probable-Number (MPN) method for enumeration of E. coli in accordance with the European Union reference method ISO 16649-3:2015. E. coli VTEC was investigated following a direct multiplex Polymerase Chain Reaction (PCR) screening test. The enumeration of E. coli met the European law limit for Class A areas of 230 MPN/100g. The averaged enumeration of E. coli in samples of M. galloprovincialis and R. decussatus collected at the harvesting time was 39 and 37 MPN/100 g respectively. The average contamination levels in samples collected after purification were 58 MPN/100g (M. galloprovincialis) and 32 MPN/100 g (R. decussatus). E. coli VTEC was not detected, on the contrary, Salmonella ser. Typhimurium was detected in one sample of M. galloprovincialis and in one sample of R. decussatus collected at the harvesting time. No significant associations were observed between E. coli levels in shellfish and environmental parameters of water or with the detection of Salmonella ser. Typhimurium in M. galloprovincialis and R. decussatus samples. Nevertheless, the occurrence of Salmonella ser. Typhimurium, involved in human infection outbreaks, should be considered a potential risk for consumers.
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Affiliation(s)
- Sonia Lamon
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | - Francesca Piras
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | - Domenico Meloni
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | - Vanessa Agus
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | | | - Margherita Pes
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | | | - Giuseppe Esposito
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | - Federica Fois
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | | | - Anna Mureddu
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
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Giusti A, Costa E, Traina A, Nucera D, Serratore P, Orlandi M, Armani A. Analysis of the sanitary survey 2015-2017 conducted in the gulf of La Spezia (Italy): Reclassification of the areas of production of live bivalve molluscs. Ital J Food Saf 2020; 9:8448. [PMID: 32300566 PMCID: PMC7154601 DOI: 10.4081/ijfs.2020.8448] [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: 07/26/2019] [Accepted: 12/18/2019] [Indexed: 12/16/2022] Open
Abstract
The sanitary survey is aimed at classifying and monitoring the production areas of live bivalve molluscs (LBM) and it is performed using standards that are provided by the Centre for Environment, Fisheries and Aquaculture Science's Guide to Good Practice. In this study, data from the sanitary survey carried out by the Asl5 Spezzino on the production areas of the gulf of La Spezia during the period 2015-2017 were analysed. The number and type of the analysis performed both on the total sampling and on the individual target species, as well as the number and type of found non-compliance (assessed on both mandatory parameters and on parameters fixed by the local monitoring plan) were considered. Data were also compared with those from the sanitary survey 2012-2014. Appropriate statistic tests were used to evaluate data from E. coli and Norovirus monitoring. Overall, 4306 analysis were performed, especially on the species M. galloprovincialis (89%) and they were mostly focused on to the search of biological agents. 160 NC were detected. Most of the NC concerns the Norovirus's positivity (93.75%) in M. galloprovincialis and C. gigas. A correlation between the levels of E. coli and rainfall/ seasonality (higher levels in the colder months) was proved, especially in the sampling points located in the inner part of the dam and in the Portovenere Bay. Class B was reconfirmed for M. galloprovincialis, the production areas of C. gigas were reclassified as A and those of V. verrucosa were definitively closed. The sanitary survey was therefore confirmed as a useful tool for reclassification and for monitoring LBM production areas.
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Affiliation(s)
- Alice Giusti
- FishLab, Department of Veterinary Sciences, University of Pisa
| | - Erica Costa
- Liguria Local Health Unit - ASL 5, Complex Unit of Hygiene of Foods and Animal Origin, La Spezia
| | - Alice Traina
- FishLab, Department of Veterinary Sciences, University of Pisa
| | - Daniele Nucera
- Department of Agriculture, Forest and Food Science, University of Turin
| | | | - Mino Orlandi
- Liguria Local Health Unit - ASL 5, Complex Unit of Hygiene of Foods and Animal Origin, La Spezia
| | - Andrea Armani
- FishLab, Department of Veterinary Sciences, University of Pisa
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10
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Krumova-Valcheva G, Mladenova Z, Gogov Y. Study on norovirus contamination of live bivalve molluscs using real-time PCR. BULGARIAN JOURNAL OF VETERINARY MEDICINE 2020. [DOI: 10.15547/bjvm.2019-0008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Foodborne and waterborne viruses are a major cause of human morbidity. Of them, noroviruses are recognised as the leading causative agents of sporadic infections and epidemic outbreaks of acute gastroenteritis in humans. Contaminated food products and water are the main source of infection with noroviruses. The infection of bivalve molluscs with human pathogenic viruses occurs by faecal contamination in the production coastal waters. In this study, 47 samples of live bivalve molluscs, including 15 samples of cultivated mussels (Mytilus galloprovincialis) and 32 samples of wild mussels (Tapes decussatus), collected from the Bulgarian and Mediterranean coasts, respectively, were submitted to RT-real-time TaqMan PCR to detect the presence of noroviruses genotype GI and GII. Norovirus genotype GII was found in 11 (23.4%) of all the samples tested. A single mollusc sample (2.1%) was positive for both norovirus genotypes. Our results demonstrated that shellfish intended for sale on the Bulgarian market might pose a potential risk for acquiring norovirus infection. Thus, food safety quality control of shellfish by optimised and standardised methods for detection of foodborne viruses, including noroviruses, should be urgently implemented in Bulgaria.
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11
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Lamon S, Consolati SG, Fois F, Cambula MG, Pes M, Porcheddu G, Agus V, Esposito G, Mureddu A, Meloni D. Occurrence, Seasonal Distribution, and Molecular Characterization of Vibrio vulnificus, Vibrio cholerae, and Vibrio parahaemolyticus in Shellfish ( Mytilus galloprovincialis and Ruditapes decussatus) Collected in Sardinia (Italy). J Food Prot 2019; 82:1851-1856. [PMID: 31603702 DOI: 10.4315/0362-028x.jfp-19-021] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this study, we investigated the occurrence, seasonal distribution, and molecular characterization of pathogenic vibrios in Mediterranean mussels (Mytilus galloprovincialis) and grooved carpet shells (Ruditapes decussatus) from two harvesting areas of Sardinia (Italy). Samples collected before and after depuration were submitted for qualitative and quantitative determination of Vibrio spp. Vibrio spp. isolates were presumptively identified by means of biochemical methods. Identification and virulence profile of Vibrio cholerae, Vibrio parahaemolyticus, and Vibrio vulnificus were performed by molecular methods. The prevalence of Vibrio spp. in M. galloprovincialis and R. decussatus was, respectively, 96 and 77%. The averaged enumeration (mean ± standard deviation) of Vibrio spp. in samples of M. galloprovincialis and R. decussatus collected at the harvesting time was 2.04 ± 0.45 and 2.51 ± 0.65 log CFU/g, respectively. The average contamination levels in samples collected after purification were 2.28 ± 0.58 log CFU/g (M. galloprovincialis) and 2.12 ± 0.67 log CFU/g (R. decussatus). Four potentially pathogenic V. parahaemolyticus isolates (tdh+ or trh+) were recovered from grooved carpet shells samples. No isolate was tdh+/trh+. The presence of potentially pathogenic vibrios in Sardinian waters strengthens the need for rational purification practices under controlled conditions to guarantee the protection of consumers.
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Affiliation(s)
- Sonia Lamon
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Simonetta G Consolati
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Federica Fois
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Maria G Cambula
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Margherita Pes
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Gabriella Porcheddu
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Vanessa Agus
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Giuseppe Esposito
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Anna Mureddu
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Domenico Meloni
- Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
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12
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Bazzoni AM, Mudadu AG, Esposito G, Urru R, Ortu S, Mara L, Uda MT, Arras I, Lorenzoni G, Sanna G, Bazzardi R, Marongiu E, Virgilio S, Meloni D. Bacterial and Viral Investigations Combined with Determination of Phytoplankton and Algal Biotoxins in Mussels and Water from a Mediterranean Coastal Lagoon (Sardinia, Italy). J Food Prot 2019; 82:1501-1511. [PMID: 31411509 DOI: 10.4315/0362-028x.jfp-18-569] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Calich Lagoon is a Mediterranean coastal lagoon located along the northwestern coast of Sardinia (Italy). The connection to marine and fresh water determines the high productivity of this coastal lagoon. Despite its great potential and the presence of natural beds of bivalve mollusks (Mytilus galloprovincialis), the lagoon has not yet been classified for shellfish production. In this study, through a multidisciplinary approach, the presence of several bacterial pathogens (Escherichia coli, Salmonella spp., and Vibrio spp.) and viral pathogens (hepatitis A virus and norovirus genogroups I and II) was evaluated from March 2017 to February 2018. In addition, phytoplankton composition in lagoon waters and associated algal biotoxins (paralytic and diarrhetic shellfish poisoning) in mussels were also monitored. The aim of this study was to provide useful data to improve knowledge about their seasonal presence and to assess the potential risk for public health, as well as to provide input for future conservation and management strategies. In mussels, Salmonella spp. were found in spring, along with E. coli, but Salmonella spp. were not found in autumn or winter, even though E. coli was detected in these seasons. Vibrio parahaemolyticus was found in autumn and winter, but not in spring. Norovirus genogroups I and II were found in winter samples. None of the bacteria were found in summer. Algal biotoxins have never been detected in mussel samples. Among potentially harmful phytoplankton, only Pseudo-nitzschia spp. were present, mainly in summer. The results showed that a possible bacterial and viral contamination, together with the presence of potentially toxic microalgae, is a real problem. Therefore, the development of natural resource management strategies is necessary to ensure the good quality of waters and guarantee the protection of consumers.
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Affiliation(s)
- Anna Maria Bazzoni
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.])
| | - Alessandro Graziano Mudadu
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.])
| | - Giuseppe Esposito
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.]).,University of Sassari, Department of Veterinary Medicine, Via Vienna 2, 07100 Sassari, Italy
| | - Roberta Urru
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.])
| | - Sergio Ortu
- Regional Natural Park of Porto Conte, SP. 55 N. 44, 07041 Alghero, Italy
| | - Laura Mara
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.])
| | - Maria Teresa Uda
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.])
| | - Igor Arras
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.])
| | - Giuseppa Lorenzoni
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.])
| | - Giovanna Sanna
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.])
| | - Riccardo Bazzardi
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.])
| | - Edoardo Marongiu
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.])
| | - Sebastiano Virgilio
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.])
| | - Domenico Meloni
- Veterinary Public Health Institute of Sardinia, Complex Structure of Food Hygiene, Via Duca degli Abruzzi 8, 07100 Sassari, Italy (ORCID: https://orcid.org/0000-0001-7236-3845 [A.M.B.]).,University of Sassari, Department of Veterinary Medicine, Via Vienna 2, 07100 Sassari, Italy
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