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Le ND, Hoang TTH, Nguyen TMH, Rochelle-Newall E, Pham TMH, Phung TXB, Duong TT, Nguyen TAH, Dinh LM, Duong TN, Nguyen TD, Le TPQ. Microbial contamination in the coastal aquaculture zone of the Ba Lat river mouth, Vietnam. MARINE POLLUTION BULLETIN 2023; 192:115078. [PMID: 37210986 DOI: 10.1016/j.marpolbul.2023.115078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 05/09/2023] [Accepted: 05/15/2023] [Indexed: 05/23/2023]
Abstract
Contamination of aquaculture products by pathogenic organisms is a major concern in areas where this activity is of high economic importance. The abundances of total coliforms (TC), Escherichia coli (EC) and faecal streptococci (FS) (in CFU.100 mL-1) in seawater in the Red River coastal aquaculture zone were determined. The results showed TC numbers (200 to 9100; average 1822), EC (<100 to 3400; average 469) and FS (<100 to 2100; average 384), of which TC exceeded the allowable threshold of the Vietnam regulation for coastal aquaculture water. TC and EC numbers in 4 wastewater types (domestic, livestock farming sewage, agricultural runoff, and mixed sewage canals) were investigated and revealed the importance of point sources of faecal contamination in seawater. These results underline the need to reduce the release of untreated wastewater and to put into place seawater microbial quality monitoring in areas where the development of sustainable aquaculture is an objective.
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Affiliation(s)
- Nhu Da Le
- Laboratory of Environmental Chemistry, Institute of Natural Product Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Viet Nam; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Viet Nam.
| | - Thi Thu Ha Hoang
- Laboratory of Environmental Chemistry, Institute of Natural Product Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Viet Nam
| | - Thi Mai Huong Nguyen
- Laboratory of Environmental Chemistry, Institute of Natural Product Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Viet Nam
| | - Emma Rochelle-Newall
- Institute of Ecology and Environmental Sciences of Paris (iEES-Paris), Sorbonne University, University Paris-Est Créteil, IRD, CNRS, INRA, Paris, France
| | - Thi Minh Hanh Pham
- Institute of Mechanics, Vietnam Academy of Science and Technology, 264 Doi Can, Ba Dinh, Hanoi, Viet Nam
| | - Thi Xuan Binh Phung
- Electric Power University, 235 Hoang Quoc Viet, Bac Tu Liem, Hanoi, Viet Nam
| | - Thi Thuy Duong
- Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Viet Nam
| | - Thi Anh Huong Nguyen
- University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Viet Nam
| | - Le Minh Dinh
- University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Viet Nam
| | - Thanh Nghi Duong
- Institute of Marine Environment and Natural Resources, Vietnam Academy of Science and Technology, Hai Phong, Viet Nam
| | - Tien Dat Nguyen
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Viet Nam
| | - Thi Phuong Quynh Le
- Laboratory of Environmental Chemistry, Institute of Natural Product Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Viet Nam; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Viet Nam.
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Dželalija M, Kvesić M, Novak A, Fredotović Ž, Kalinić H, Šamanić I, Ordulj M, Jozić S, Goić Barišić I, Tonkić M, Maravić A. Microbiome profiling and characterization of virulent and vancomycin-resistant Enterococcus faecium from treated and untreated wastewater, beach water and clinical sources. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159720. [PMID: 36306843 DOI: 10.1016/j.scitotenv.2022.159720] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/20/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
Vancomycin-resistant Enterococcus faecium (VREfm) is an opportunistic pathogen among the highest global priorities regarding public and environmental health. Following One Health approach, we determined for the first time the antibiotic resistance and virulence genes, and sequence types (STs) affiliation of VREfm recovered simultaneously from marine beach waters, submarine outfall of a wastewater treatment plant and an offshore discharge of untreated sewage, and compared them with the surveillance VREfm from regional university hospital in Croatia to assess the hazard of their transmission and routes of introduction into the natural environment. Importantly, VREfm recovered from wastewater, coastal bathing waters and hospital shared similar virulence, multidrug resistance, and ST profiles, posing a major public health threat. All isolates carried the vanA gene, while one clinical isolate also possessed the vanC2/C3 gene. The hospital strains largely carried the aminoglycoside-resistance genes aac(6')-Ie-aph(2″)-Ia, and aph(2″)-Ib and aph(2″)-Id, which were also predominant in the environmental isolates. The hyl gene was the most prevalent virulence gene. The isolates belonged to 10 STs of the clonal complex CC17, a major epidemic lineage associated with hospital infections and outbreaks, with ST117 and ST889 common to waterborne and hospital isolates, pointing to their sewage-driven dissemination. To gain better insight into the diversity of accompanying taxons in the surveyed water matrices, microbiome taxonomic profiling was carried out using Illumina-based 16S rDNA sequencing and their resistome features predicted using the PICRUSt2 bioinformatics tool. An additional 60 pathogenic bacterial genera were identified, among which Arcobacter, Acinetobacter, Escherichia-Shigella, Bacteroides and Pseudomonas were the most abundant and associated with a plethora of antibiotic resistance genes and modules, providing further evidence of the hazardous effects of wastewater discharges, including the treated ones, on the natural aquatic environment that should be adequately addressed from a sanitary and technological perspective.
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Affiliation(s)
- Mia Dželalija
- Department of Biology, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia
| | - Marija Kvesić
- Center of Excellence for Science and Technology-Integration of Mediterranean Region, University of Split, Ruđera Boškovića 31, 21000 Split, Croatia; Doctoral study of Biophysics, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia
| | - Anita Novak
- School of Medicine, University of Split, Šoltanska 2, 21000 Split, Croatia; University Hospital Split, Spinčićeva 1, Split, Croatia
| | - Željana Fredotović
- Department of Biology, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia
| | - Hrvoje Kalinić
- Department of Informatics, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia
| | - Ivica Šamanić
- Department of Biology, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia
| | - Marin Ordulj
- University Department of Marine Studies, University of Split, Ruđera Boškovića 37, 21000 Split, Croatia
| | - Slaven Jozić
- Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia
| | - Ivana Goić Barišić
- School of Medicine, University of Split, Šoltanska 2, 21000 Split, Croatia; University Hospital Split, Spinčićeva 1, Split, Croatia
| | - Marija Tonkić
- School of Medicine, University of Split, Šoltanska 2, 21000 Split, Croatia; University Hospital Split, Spinčićeva 1, Split, Croatia
| | - Ana Maravić
- Department of Biology, Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia.
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