Distinct Aeromonas Populations in Water Column and Associated with Copepods from Estuarine Environment (Seine, France)
Aeromonas spp. are ubiquitous bacteria primarily recovered from aquatic ecosystems. They are found in fresh water as well as estuarine and marine waters, and in association with numerous autochthonous aquatic organisms in these environments. However, aeromonads are also etiologic agents of fish dise...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2017-07-01
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| Series: | Frontiers in Microbiology |
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| Online Access: | http://journal.frontiersin.org/article/10.3389/fmicb.2017.01259/full |
| _version_ | 1819064603486715904 |
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| author | Gautier Chaix Frédéric Roger Thierry Berthe Brigitte Lamy Brigitte Lamy Estelle Jumas-Bilak Estelle Jumas-Bilak Robert Lafite Joëlle Forget-Leray Fabienne Petit Fabienne Petit |
| author_facet | Gautier Chaix Frédéric Roger Thierry Berthe Brigitte Lamy Brigitte Lamy Estelle Jumas-Bilak Estelle Jumas-Bilak Robert Lafite Joëlle Forget-Leray Fabienne Petit Fabienne Petit |
| author_sort | Gautier Chaix |
| collection | DOAJ |
| description | Aeromonas spp. are ubiquitous bacteria primarily recovered from aquatic ecosystems. They are found in fresh water as well as estuarine and marine waters, and in association with numerous autochthonous aquatic organisms in these environments. However, aeromonads are also etiologic agents of fish diseases and are now recognized as emerging pathogens in humans. The estuary is therefore a key environment, harboring autochthonous aeromonads, and aeromonads originating from humans and animals, mainly released by treated WWTP effluent or watershed run-off via tributaries. The present study compares the abundance and the diversity of Aeromonas populations. Over 2 years of monitoring (eight campaigns from February 2013 to November 2015), the occurrence of Aeromonas was investigated within the water column (water and fluid mud) and in association with copepods. Moreover, the diversity of Aeromonas populations was ascertained by analyzing gyrB and radA sequences, and the antibiotic-resistance phenotypes were determined using the disk diffusion method. This study shows, for the first time, the presence of Aeromonas spp. in water (1.1 × 102 to 1.2 ± 0.3 × 103 CFU.100 mL-1), fluid mud (2.6 ± 2.6 × 102 to 9.8 ± 0.9 × 103 CFU.g-1) and in association with living copepods (1.9 ± 0.7 × 102 to >1.1 × 104 CFU.g-1) in the Seine estuary. Moreover, the diversity study, conducted on 36 strains isolated from the water column and 47 strains isolated from copepods, indicates distinct populations within these two compartments. Strains distributed in five clusters corresponding to A. bestiarum (n = 6; 5.45%), A. encheleia (n = 1; 0.91%), A. media (n = 22; 20.0%), A. rivipollensis (n = 34; 30.91%) and A. salmonicida (n = 47; 42.73%). A. salmonicida is the most abundant species associated with Eurytemora affinis (n = 35; 74.47%). In contrast, A. salmonicida accounts for only 30.56% (n = 11) of isolates in the water column. This study shows the coexistence of distinct populations of Aeromonas in the oligohaline area of an anthropized estuary. Moreover, A. media, a putative human pathogen, present in the water column and abundant in the WWTP samples, was not detected in association with living copepods. |
| first_indexed | 2024-12-21T15:33:12Z |
| format | Article |
| id | doaj.art-3ffacaf07dd94304bc81d6b361f7f3ca |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-12-21T15:33:12Z |
| publishDate | 2017-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-3ffacaf07dd94304bc81d6b361f7f3ca2022-12-21T18:58:42ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2017-07-01810.3389/fmicb.2017.01259232185Distinct Aeromonas Populations in Water Column and Associated with Copepods from Estuarine Environment (Seine, France)Gautier Chaix0Frédéric Roger1Thierry Berthe2Brigitte Lamy3Brigitte Lamy4Estelle Jumas-Bilak5Estelle Jumas-Bilak6Robert Lafite7Joëlle Forget-Leray8Fabienne Petit9Fabienne Petit10UNIROUEN, UNICAEN, CNRS, M2C, Normandie UniversitéRouen, FranceUNIROUEN, UNICAEN, CNRS, M2C, Normandie UniversitéRouen, FranceUNIROUEN, UNICAEN, CNRS, M2C, Normandie UniversitéRouen, FranceCNRS 5569 HSM, Équipe Pathogènes Hydriques Santé Environnements, Université de MontpellierMontpellier, FranceLaboratoire de Bactériologie, CHU de NiceNice, FranceCNRS 5569 HSM, Équipe Pathogènes Hydriques Santé Environnements, Université de MontpellierMontpellier, FranceDépartement d’Hygiène Hospitalière, CHRU de MontpellierMontpellier, FranceUNIROUEN, UNICAEN, CNRS, M2C, Normandie UniversitéRouen, FranceULH UMR I-02 SEBIO, FR CNRS SCALE, Normandie UniversitéLe Havre, FranceUNIROUEN, UNICAEN, CNRS, M2C, Normandie UniversitéRouen, FranceUPMC, CNRS, EPHE, UMR 7619 METIS, Sorbonne UniversitésParis, FranceAeromonas spp. are ubiquitous bacteria primarily recovered from aquatic ecosystems. They are found in fresh water as well as estuarine and marine waters, and in association with numerous autochthonous aquatic organisms in these environments. However, aeromonads are also etiologic agents of fish diseases and are now recognized as emerging pathogens in humans. The estuary is therefore a key environment, harboring autochthonous aeromonads, and aeromonads originating from humans and animals, mainly released by treated WWTP effluent or watershed run-off via tributaries. The present study compares the abundance and the diversity of Aeromonas populations. Over 2 years of monitoring (eight campaigns from February 2013 to November 2015), the occurrence of Aeromonas was investigated within the water column (water and fluid mud) and in association with copepods. Moreover, the diversity of Aeromonas populations was ascertained by analyzing gyrB and radA sequences, and the antibiotic-resistance phenotypes were determined using the disk diffusion method. This study shows, for the first time, the presence of Aeromonas spp. in water (1.1 × 102 to 1.2 ± 0.3 × 103 CFU.100 mL-1), fluid mud (2.6 ± 2.6 × 102 to 9.8 ± 0.9 × 103 CFU.g-1) and in association with living copepods (1.9 ± 0.7 × 102 to >1.1 × 104 CFU.g-1) in the Seine estuary. Moreover, the diversity study, conducted on 36 strains isolated from the water column and 47 strains isolated from copepods, indicates distinct populations within these two compartments. Strains distributed in five clusters corresponding to A. bestiarum (n = 6; 5.45%), A. encheleia (n = 1; 0.91%), A. media (n = 22; 20.0%), A. rivipollensis (n = 34; 30.91%) and A. salmonicida (n = 47; 42.73%). A. salmonicida is the most abundant species associated with Eurytemora affinis (n = 35; 74.47%). In contrast, A. salmonicida accounts for only 30.56% (n = 11) of isolates in the water column. This study shows the coexistence of distinct populations of Aeromonas in the oligohaline area of an anthropized estuary. Moreover, A. media, a putative human pathogen, present in the water column and abundant in the WWTP samples, was not detected in association with living copepods.http://journal.frontiersin.org/article/10.3389/fmicb.2017.01259/fullAeromonasdiversitycopepodsestuaryantibiotic resistance |
| spellingShingle | Gautier Chaix Frédéric Roger Thierry Berthe Brigitte Lamy Brigitte Lamy Estelle Jumas-Bilak Estelle Jumas-Bilak Robert Lafite Joëlle Forget-Leray Fabienne Petit Fabienne Petit Distinct Aeromonas Populations in Water Column and Associated with Copepods from Estuarine Environment (Seine, France) Frontiers in Microbiology Aeromonas diversity copepods estuary antibiotic resistance |
| title | Distinct Aeromonas Populations in Water Column and Associated with Copepods from Estuarine Environment (Seine, France) |
| title_full | Distinct Aeromonas Populations in Water Column and Associated with Copepods from Estuarine Environment (Seine, France) |
| title_fullStr | Distinct Aeromonas Populations in Water Column and Associated with Copepods from Estuarine Environment (Seine, France) |
| title_full_unstemmed | Distinct Aeromonas Populations in Water Column and Associated with Copepods from Estuarine Environment (Seine, France) |
| title_short | Distinct Aeromonas Populations in Water Column and Associated with Copepods from Estuarine Environment (Seine, France) |
| title_sort | distinct aeromonas populations in water column and associated with copepods from estuarine environment seine france |
| topic | Aeromonas diversity copepods estuary antibiotic resistance |
| url | http://journal.frontiersin.org/article/10.3389/fmicb.2017.01259/full |
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