Human health risk attributed to consumption of seafood and recreation swimming in Negombo Lagoon, Sri Lanka: An assessment on lagoon water and inhabitant oysters (Crassostrea cucullata Born, 1778)

Samuel Ayitey, T.W.G.F. Mafaziya Nijamdeen, H Peiris, Sunanda Kodikara Kodikara Arachchilage, Isabelle George, Farid Dahdouh Guebas, K.H.M. Ashoka Deepananda

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Abstract

The Negombo Lagoon is a coastal lagoon influenced by local communities that introduce waste into its ecosystem. This study examined seven sewage entry points, out of which five sites were chosen for oyster sampling based on availability. Physicochemical and microbiological parameters of water (measured in triplicate at each site, n = 84) and oyster samples (total length, TL > 6 cm, n = 30) were assessed. Variation in regional coliform contamination was analyzed employing a one-way analysis of variance (ANOVA). Results indicated that
the northern part of the lagoon exceeded recommended coliform thresholds for swimming (total coliform concentration (TCC) < 126 most probable number (MPN)) and seafood consumption (TCC < 100 MPN/g), indicating the presence of Escherichia coli. Water quality indices affirmed fecal pollution, except in the southern part of the lagoon. Furthermore, the study found high oyster consumption (76.7 %), elucidating that oysters from the northern part of Negombo Lagoon pose health risks
Original languageEnglish
Article number116189
Number of pages11
JournalMarine Pollution Bulletin
Volume201
Issue number116189
DOIs
Publication statusPublished - Apr 2024

Bibliographical note

Funding Information:
The authors express their gratitude to the Erasmus Mundus excellence grant through the European Commission -funded Erasmus Mundus Joint Master Degree in Tropical Biodiversity and Ecosystems - TROPIMUNDO, as well as to the FSPI-SEDRIC Project of the French Embassy of Sri Lanka through the Department of Botany, University of Ruhuna (UoR), for providing funding for this research work. The authors also extend thanks to the Faculty of Allied Health Science, the Faculty of Fisheries and Marine Sciences and Technology, and the Department of Botany at UoR for providing laboratory space and facilities for the research. We are especially thankful to Vidusana P.G.G.S of the Faculty of Allied Health Sciences for supporting the microbiology aspect of the research and to Wijesundara W.M.I.C. and Ranawaka D.P·D for assisting in conducting interviews with the local people in Negombo, Sri Lanka.

Funding Information:
The authors express their gratitude to the Erasmus Mundus excellence grant through the European Commission-funded Erasmus Mundus Joint Master Degree in Tropical Biodiversity and Ecosystems - TROPIMUNDO, as well as to the FSPI-SEDRIC Project of the French Embassy of Sri Lanka through the Department of Botany, University of Ruhuna (UoR), for providing funding for this research work. The authors also extend thanks to the Faculty of Allied Health Science, the Faculty of Fisheries and Marine Sciences and Technology, and the Department of Botany at UoR for providing laboratory space and facilities for the research. We are especially thankful to Vidusana P.G.G.S of the Faculty of Allied Health Sciences for supporting the microbiology aspect of the research and to Wijesundara W.M.I.C. and Ranawaka D.P·D for assisting in conducting interviews with the local people in Negombo, Sri Lanka.

Publisher Copyright:
© 2024 Elsevier Ltd

Keywords

  • Crassostrea cuccullata Escherichia coli Negombo Lagoon Sewage pollution Total coliform

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