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1.
Journal of Bacteriology and Virology ; : 71-83, 2016.
Artigo em Coreano | WPRIM | ID: wpr-153898

RESUMO

The associations between storm events, urban runoff and costal water quality have not been well investigated in Korea. A temporal and spatial analysis during summer, 2015 was conducted to determine associates between urban runoff and fecal indicator bacteria (Escherichia coli, Enterococcus) levels at two popular coastal beaches (Gwanganri beach and Haundae beach) in Busan. In this study, a clear relationship between rainfall and elevated number of indicators was observed. Two beaches met the costal beach water health standards after less than 3.0 mm of rain. Only for storms less than 2.5 mm was no observable rainfall effect. Our results revealed that exceedances were greatest in 5 hours following 41.0~45.5 rainfall, then declined the bacterial concentrations in 8 hours after the storm and they generally returned to levels below water health standards within 10~14 hours. But it took 2.7 days to get the level of water quality of dry days. The time required for water quality recovery depends on the intensity and duration of rainfall. In the event of intense rainfall issuance of beach closure by public authorities is warranted to protect public health.


Assuntos
Bactérias , Enterococcus , Coreia (Geográfico) , Saúde Pública , Chuva , Análise Espacial , Natação , Qualidade da Água , Água
2.
Journal of Bacteriology and Virology ; : 131-139, 2013.
Artigo em Coreano | WPRIM | ID: wpr-117658

RESUMO

We analyzed the occurrence of enteric viruses and bacteria at 22 places of drinkable groundwater (civil defense emergency water-supply facility), 8 places of the groundwater used for drinking water in group food services, and 10 places of spring-water. When the 40 concentrated samples were analyzed using nested RT-PCR and real-time RT PCR methods, norovirus and other enteric viruses were not detected in all samples tested. The detection percentages for total coliforms, Escherichia coli, Yersinia enterocolitica of fecal indicator were 57.5%, 22.5% and 7.5%, respectively. Colipages were not detected. These results suggest that high levels of fecal indicator bacteria in groundwater and spring-water are not directly related to occurrence of enteric viruses.


Assuntos
Bactérias , Água Potável , Emergências , Escherichia coli , Serviços de Alimentação , Água Subterrânea , Norovirus , Reação em Cadeia da Polimerase , Yersinia enterocolitica
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