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Enterokoky v hodnotení mikrobiálnej kontaminácie vôd dunaja a štrkovísk v okolí Bratislavy


Enterokoky v hodnotení mikrobiálnej kontaminácie vôd dunaja a štrkovísk v okolí Bratislavy

Enterococci in the evaluation of microbial contamination of danube river and gravel pits in surroundings of Bratislava


• tento článok sa nachádza v kategórii: PODZEMNÁ VODA / rok 2007 [ ročník XIII, číslo 1 ]
Milan Seman, Renáta Fľaková, Hana Drahovská, Zlatica Ženišová

ABSTRACT: There are tens of artificial lakes in the Bratislava surroundings, so called gravel pits, used currently as natural swimming pools. By their origin they are related to the river Danube. The quality of the water is determined by various indicators, especially hydrochemical and microbiological ones. Significant indicator of faecal contamination is the presence of enterococci. Despite of the fact that there are only few differences in chemical content of the water in the Danube river and gravel pits, there are differences in the occurrence of enterococcal species; faecal enterococci (Enterococcus faecalis, E. faecium, E. durans, E. hirae) dominate in the river Danube, and only two non-faecal enterococcal species were found in the water of gravel pits: E. casseliflavus and E. seriolicida (identical genotype to Lactococcus garviae). The absence of the faecal enterococci in the gravel pits, even during the summer can be explained by relatively good self-cleaning ability of environment. Low content of nutritious sources expressed as BOD5, CODMn, CODCr and predacious pressure are not favourable for multiplication of enterococci in these environments. The river Danube enters the territory of Bratislava with higher content of enterococci compared to the gravel pits, what could be explained by higher presence of organic compounds.


bibliografický
odkaz na článok:
Seman, M., Fľaková, R., Drahovská, H. & Z. Ženišová, 2007: Enterokoky v hodnotení mikrobiálnej kontaminácie vôd dunaja a štrkovísk v okolí Bratislavy.- Podzemná voda ISSN 1335-1052, XIII, 1/2007, 100-106.

jazyk článku: slovenčina

kľúčové slová: enterokoky, štrkoviská, mikrobiálna kontaminácia, kvalita vody

key words: Enterococci, gravel pites, microbial contamination, water quality

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