FN Archimer Export Format PT J TI Identification of the origin of faecal contamination in estuarine oysters using Bacteroidales and F-specific RNA bacteriophage markers BT AF MIESZKIN, Sophie CAPRAIS, Marie-Paule LE MENNEC, Cecile LE GOFF, Manon EDGE, T. A. GOURMELON, Michele AS 1:1;2:1;3:1;4:1;5:2;6:1; FF 1:PDG-RBE-EMP-MIC;2:PDG-RBE-SG2M-LSEM;3:PDG-RBE-SG2M-LSEM;4:;5:;6:PDG-RBE-SG2M-LSEM; C1 IFREMER, Lab Sante Environm & Microbiol, Unite SG2M, Dept RBE, F-29280 Plouzane, France. Environm Canada, Water Sci & Technol Directorate, Natl Water Res Inst, Burlington, ON L7R 4A6, Canada. C2 IFREMER, FRANCE ENVIRONM CANADA, CANADA UBO, FRANCE SI BREST NANTES UBO SE PDG-RBE-EMP-MIC PDG-RBE-SG2M-LSEM UBOLEMAR IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france copubli-int-hors-europe IF 2.386 TC 17 UR https://archimer.ifremer.fr/doc/00153/26426/25250.pdf LA English DT Article DE ;Escherichia coli;Estuarine and river waters;F-specific RNA bacteriophages;host-associated Bacteroidales markers;microbial source tracking;shellfish AB Aims: The aim of this study was to identify the origin of faecal pollution impacting the Elorn estuary (Brittany, France) by applying microbial source tracking (MST) markers in both oysters and estuarine waters. Methods and Results: The MST markers used were as follows: (i) human-, ruminant- and pig-associated Bacteroidales markers by real-time PCR and (ii) human genogroup II and animal genogroup I of F-specific RNA bacteriophages (FRNAPH) by culture/genotyping and by direct real-time reverse-transcriptase PCR. The higher occurrence of the human genogroup II of F-specific RNA bacteriophages using a culture/genotyping method, and human-associated Bacteroidales marker by real-time PCR, allowed the identification of human faecal contamination as the predominant source of contamination in oysters (total of 18 oyster batches tested) and waters (total of 24 water samples tested). The importance of using the intravalvular liquids instead of digestive tissues, when applying host-associated Bacteroidales markers in oysters, was also revealed. Conclusions: This study has shown that the application of a MST toolbox of diverse bacterial and viral methods can provide multiple lines of evidence to identify the predominant source of faecal contamination in shellfish from an estuarine environment. Significance and Impact of the Study: Application of this MST toolbox is a useful approach to understand the origin of faecal contamination in shellfish harvesting areas in an estuarine setting. PY 2013 PD SEP SO Journal Of Applied Microbiology SN 1364-5072 PU Wiley-blackwell VL 115 IS 3 UT 000323105500028 BP 897 EP 907 DI 10.1111/jam.12260 ID 26426 ER EF