Microbial contamination in the coastal aquaculture zone of the Ba Lat river mouth, Vietnam

Nhu Da Le; Thi Thu Ha Hoang; Thi Mai Huong Nguyen; Emma Rochelle-Newall; Thi Minh Hanh Pham; Thi Xuan Binh Phung; Thi Thuy Duong; Thi Anh Huong Nguyen; Le Minh Dinh; Thanh Nghi Duong; Tien Dat Nguyen; Thi Phuong Quynh Le

doi:10.1016/j.marpolbul.2023.115078

Microbial contamination in the coastal aquaculture zone of the Ba Lat river mouth, Vietnam

Mar Pollut Bull. 2023 Jul:192:115078. doi: 10.1016/j.marpolbul.2023.115078. Epub 2023 May 20.

Affiliations

¹ 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. Electronic address: danhule@gmail.com.
² 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.
³ Institute of Ecology and Environmental Sciences of Paris (iEES-Paris), Sorbonne University, University Paris-Est Créteil, IRD, CNRS, INRA, Paris, France.
⁴ Institute of Mechanics, Vietnam Academy of Science and Technology, 264 Doi Can, Ba Dinh, Hanoi, Viet Nam.
⁵ Electric Power University, 235 Hoang Quoc Viet, Bac Tu Liem, Hanoi, Viet Nam.
⁶ Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Viet Nam.
⁷ University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Viet Nam.
⁸ Institute of Marine Environment and Natural Resources, Vietnam Academy of Science and Technology, Hai Phong, Viet Nam.
⁹ Center for Research and Technology Transfer, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Viet Nam.
¹⁰ 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. Electronic address: quynhltp@gmail.com.

PMID: 37210986
DOI: 10.1016/j.marpolbul.2023.115078

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.

Keywords: Aquaculture; Coastal zone; E. coli; Faecal indicator bacterial (FIB); Faecal streptococci; Human impacts; Red River estuary.

MeSH terms

Aquaculture
Environmental Monitoring / methods
Escherichia coli
Feces
Gram-Negative Bacteria
Sewage*
Vietnam
Wastewater*
Water Microbiology

Substances

Wastewater
Sewage