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Experimental evaluation of survival of Vibrio parahaemolyticus in fertilized cold‐water sediment
Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Sciences, Research environment Man & Biosphere Health (MABH).
Kristianstad University, Faculty of Natural Sciences, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap. Royal Swedish Academy of Sciences.ORCID iD: 0000-0002-4102-2885
2020 (English)In: Journal of Applied Microbiology, ISSN 1364-5072, E-ISSN 1365-2672, ISSN 1364-5072, Vol. 129, no 1, p. 75-84Article in journal (Refereed) Published
Abstract [en]

Aims: This experimental study focuses on survival and consistence of Vibrio parahaemolyticus in cold‐water sediments and how increasing temperature and nutritional availability can affect growth. Methods and Results: A pathogenic strain of V. parahaemolyticus was inoculated in seawater microcosms containing bottom sediment. Gradually, during 14 days, the temperature was upregulated from 8 to 21°C. Culturable V. parahaemolyticus was only found in the sediment but declined over time and did not recover even after another 2 days at 37°C. Numbers of culturable bacteria matched the amount found by q‐PCR indicating that they did not enter a dormant state, contrary to those in the water layer. After adding decaying phytoplankton as fertilizer to the microcosms of 8 and 21°C for 7 and 14 days, the culturability of the bacteria increased significantly in the sediments at both temperatures and durations of exposure. Conclusion: The study showed that V. parahaemolyticus can stay viable in cold‐water sediment and growth was stimulated by fertilizers rather than by temperature. Significance and Impact of the Study: Vibrio parahaemolyticus is a common cause of seafood‐borne gastroenteritis and is today recognized in connection to increasing ocean temperature. The results indicate that this pathogen should be considered a risk in well‐fertilized environments, such as aquacultures, even during cold periods.

Place, publisher, year, edition, pages
2020. Vol. 129, no 1, p. 75-84
Keywords [en]
climate change, microcosm experiment, seafood safety, sediment, tdh+, Vibrio parahaemolyticus
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:hkr:diva-20494DOI: 10.1111/jam.14618ISI: 000541740900007OAI: oai:DiVA.org:hkr-20494DiVA, id: diva2:1416308
Available from: 2020-03-23 Created: 2020-03-23 Last updated: 2021-01-14Bibliographically approved

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Collin, Betty

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