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Rainfall Influence on the Abundance of Bacteria in Dubrovnik Marine Waters

Journal of Health Science 2018年第5期6卷 355-357页

作者： antonia mercep Andrej Jozinovic Lucia Stipicevic Dolores Grilec Marijana Pecarevic Department of Aquaculture University of Dubrovnik Cira Carica 4 Dubrovnik Croatia Institute of Public Health Dubrovnik-Neretva County Dr. Ante Sercera 4a Dubrovnik Croatia

Microbiological testing of the sea gives us great knowledge about its quality for swimming. Here we are following the fluctuations in the abundance of E. coli colonies, intestinal enterococci and total coliforms on three beaches in Dubrovnik during the rainfall in winter and spring. Three beaches Porporela, Banje and Excelsior are the most visited beaches during the summer season. Samples were taken before, during and after the rainfall on the surface, in the depth of 0.5 m and 1 m. Membrane filtration was used for sample treatment. Expected increase in the abundance of colonies is shown most on the Banje beach where the total coliforms increased 15.80 times while on the Excelsior beach E. coli colonies increased 12 times during the rainfall. On the Porporela beach there was a mild increase of intestinal enterococci colonies for 6.66 times. Regarding the data of the Institute of Public Health Dubrovnik-Neretva County the beaches were mostly marked as “excellent” especially since 2003 when the sewers were regulated in the Dubrovnik Old Town. The number of all colonies after the rainfall reduced for 99.80% in all three locations.

关键词： Bacteria sea for swimming rainfall

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