Occurrence of foodborne pathogenic bacteria in retail prepackaged portions of marine fish in Spain

To survey the presence of indigenous and nonindigenous foodborne bacterial pathogens in displayed prepacked portions of fresh marine fish. A survey of 50 different samples of fresh marine fish (conger, swordfish, sole, grouper and whiting) was conducted over a period of 5 months. Trays of fillets an...

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Veröffentlicht in:Journal of applied microbiology 2006-03, Vol.100 (3), p.527-536
Hauptverfasser: Herrera, F.C, Santos, J.A, Otero, A, García-López, M.-L
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creator Herrera, F.C
Santos, J.A
Otero, A
García-López, M.-L
description To survey the presence of indigenous and nonindigenous foodborne bacterial pathogens in displayed prepacked portions of fresh marine fish. A survey of 50 different samples of fresh marine fish (conger, swordfish, sole, grouper and whiting) was conducted over a period of 5 months. Trays of fillets and steaks were obtained at retail level and tested for foodborne bacterial pathogens. Vibrio cholerae and Salmonella were not detected. Two samples (4%) yielded Vibrio strains carrying a DNA fragment specific for Vibrio parahaemolyticus, but resulted negative to PCR amplification of the virulence-related tdh gene. Levels of motile Aeromonas ranging from 2·29 to 7·20 log CFU g[superscript [-]1] were found in 31 (62%) samples. All fish portions were positive for the Aeromonas hlyA gene and 38 for both aerA and hlyA genes, which may contribute to diarrhoea-related virulence. The incidence of Listeria monocytogenes was 10%. Levels of Staphylococcus aureus lower than 2 log CFU g[superscript [-]1] were found in 15 (30%) samples. Numbers of presumptive Clostridium perfringens ranging from 1·82 ± 0·22 to 4·26 ± 1·25 log CFU g[superscript [-]1] were detected in 42 (84%) samples. Edwardsiella tarda was detected in two samples of grouper fillets. Displayed portions of raw fish carried bacteria that can cause foodborne disease. The risk posed by fresh fish when properly cooked is low, but high when destined to be consumed raw, undercooked or very lightly processed. This study revealed that raw fish sold in Spain could be a source of foodborne bacterial pathogens. Improvements in handling and processing are needed to minimize the prevalence of pathogenic bacteria.
doi_str_mv 10.1111/j.1365-2672.2005.02848.x
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A survey of 50 different samples of fresh marine fish (conger, swordfish, sole, grouper and whiting) was conducted over a period of 5 months. Trays of fillets and steaks were obtained at retail level and tested for foodborne bacterial pathogens. Vibrio cholerae and Salmonella were not detected. Two samples (4%) yielded Vibrio strains carrying a DNA fragment specific for Vibrio parahaemolyticus, but resulted negative to PCR amplification of the virulence-related tdh gene. Levels of motile Aeromonas ranging from 2·29 to 7·20 log CFU g[superscript [-]1] were found in 31 (62%) samples. All fish portions were positive for the Aeromonas hlyA gene and 38 for both aerA and hlyA genes, which may contribute to diarrhoea-related virulence. The incidence of Listeria monocytogenes was 10%. Levels of Staphylococcus aureus lower than 2 log CFU g[superscript [-]1] were found in 15 (30%) samples. Numbers of presumptive Clostridium perfringens ranging from 1·82 ± 0·22 to 4·26 ± 1·25 log CFU g[superscript [-]1] were detected in 42 (84%) samples. Edwardsiella tarda was detected in two samples of grouper fillets. Displayed portions of raw fish carried bacteria that can cause foodborne disease. The risk posed by fresh fish when properly cooked is low, but high when destined to be consumed raw, undercooked or very lightly processed. This study revealed that raw fish sold in Spain could be a source of foodborne bacterial pathogens. Improvements in handling and processing are needed to minimize the prevalence of pathogenic bacteria.</description><identifier>ISSN: 1364-5072</identifier><identifier>EISSN: 1365-2672</identifier><identifier>DOI: 10.1111/j.1365-2672.2005.02848.x</identifier><identifier>PMID: 16478492</identifier><identifier>CODEN: JAMIFK</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject><![CDATA[Aeromonas ; Aeromonas - genetics ; Aeromonas - isolation & purification ; Animals ; Bacteria ; Biological and medical sciences ; Clostridium perfringens ; Clostridium perfringens - isolation & purification ; DNA ; Edwardsiella ; Edwardsiella tarda ; fillets ; Fishes - microbiology ; Food Handling - methods ; Food Microbiology ; foodborne bacteria ; foodborne illness ; Fundamental and applied biological sciences. 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A survey of 50 different samples of fresh marine fish (conger, swordfish, sole, grouper and whiting) was conducted over a period of 5 months. Trays of fillets and steaks were obtained at retail level and tested for foodborne bacterial pathogens. Vibrio cholerae and Salmonella were not detected. Two samples (4%) yielded Vibrio strains carrying a DNA fragment specific for Vibrio parahaemolyticus, but resulted negative to PCR amplification of the virulence-related tdh gene. Levels of motile Aeromonas ranging from 2·29 to 7·20 log CFU g[superscript [-]1] were found in 31 (62%) samples. All fish portions were positive for the Aeromonas hlyA gene and 38 for both aerA and hlyA genes, which may contribute to diarrhoea-related virulence. The incidence of Listeria monocytogenes was 10%. Levels of Staphylococcus aureus lower than 2 log CFU g[superscript [-]1] were found in 15 (30%) samples. Numbers of presumptive Clostridium perfringens ranging from 1·82 ± 0·22 to 4·26 ± 1·25 log CFU g[superscript [-]1] were detected in 42 (84%) samples. Edwardsiella tarda was detected in two samples of grouper fillets. Displayed portions of raw fish carried bacteria that can cause foodborne disease. The risk posed by fresh fish when properly cooked is low, but high when destined to be consumed raw, undercooked or very lightly processed. This study revealed that raw fish sold in Spain could be a source of foodborne bacterial pathogens. 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A survey of 50 different samples of fresh marine fish (conger, swordfish, sole, grouper and whiting) was conducted over a period of 5 months. Trays of fillets and steaks were obtained at retail level and tested for foodborne bacterial pathogens. Vibrio cholerae and Salmonella were not detected. Two samples (4%) yielded Vibrio strains carrying a DNA fragment specific for Vibrio parahaemolyticus, but resulted negative to PCR amplification of the virulence-related tdh gene. Levels of motile Aeromonas ranging from 2·29 to 7·20 log CFU g[superscript [-]1] were found in 31 (62%) samples. All fish portions were positive for the Aeromonas hlyA gene and 38 for both aerA and hlyA genes, which may contribute to diarrhoea-related virulence. The incidence of Listeria monocytogenes was 10%. Levels of Staphylococcus aureus lower than 2 log CFU g[superscript [-]1] were found in 15 (30%) samples. Numbers of presumptive Clostridium perfringens ranging from 1·82 ± 0·22 to 4·26 ± 1·25 log CFU g[superscript [-]1] were detected in 42 (84%) samples. Edwardsiella tarda was detected in two samples of grouper fillets. Displayed portions of raw fish carried bacteria that can cause foodborne disease. The risk posed by fresh fish when properly cooked is low, but high when destined to be consumed raw, undercooked or very lightly processed. This study revealed that raw fish sold in Spain could be a source of foodborne bacterial pathogens. Improvements in handling and processing are needed to minimize the prevalence of pathogenic bacteria.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>16478492</pmid><doi>10.1111/j.1365-2672.2005.02848.x</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record>
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source Oxford University Press Journals All Titles (1996-Current); MEDLINE; Wiley Online Library Journals Frontfile Complete
subjects Aeromonas
Aeromonas - genetics
Aeromonas - isolation & purification
Animals
Bacteria
Biological and medical sciences
Clostridium perfringens
Clostridium perfringens - isolation & purification
DNA
Edwardsiella
Edwardsiella tarda
fillets
Fishes - microbiology
Food Handling - methods
Food Microbiology
foodborne bacteria
foodborne illness
Fundamental and applied biological sciences. Psychology
genes
Genes, Bacterial - genetics
Genotype
grouper
Listeria
Listeria monocytogenes
Listeria monocytogenes - isolation & purification
marine fish
Microbiology
pathogens
Pisces
polymerase chain reaction
raw fish
risk
Salmonella
Salmonella - isolation & purification
Spain
Staphylococcus aureus
Staphylococcus aureus - isolation & purification
steaks
surveys
trays
Vibrio - isolation & purification
Vibrio cholerae
Vibrio parahaemolyticus
virulence
Virulence - genetics
whiting
Xiphias gladius
title Occurrence of foodborne pathogenic bacteria in retail prepackaged portions of marine fish in Spain
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