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Experimental evaluation of survival of Vibrio parahaemolyticus in fertilized cold-water sediment
Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap.
Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap.ORCID iD: 0000-0002-4102-2885
2020 (English)In: Journal of Applied Microbiology, ISSN 1364-5072, E-ISSN 1365-2672Article in journal (Refereed) Epub ahead of print
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 were only found in the sediment but declined over time and did not recover even after another two 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: V. 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.
Keywords [en]
Vibrio parahaemolyticus, tdh+, climate change, microcosm experiment, seafood safety, sediment
National Category
Microbiology
Identifiers
URN: urn:nbn:se:hkr:diva-20425DOI: 10.1111/jam.14618PubMedID: 32086873OAI: oai:DiVA.org:hkr-20425DiVA, id: diva2:1397485
Available from: 2020-02-27 Created: 2020-02-27 Last updated: 2020-02-27Bibliographically approved

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Collin, Betty

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