期刊
WATER RESEARCH
卷 45, 期 11, 页码 3279-3290出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2011.03.033
关键词
Salmonella; Campylobacter; Staphylococcus aureus; Vibrio; Fecal indicator; Tropical streams
资金
- NSF Oceans and Human Health: Pacific Research Center for Marine Biomedicine [OCE/0910491]
- Directorate For Geosciences
- Division Of Ocean Sciences [0910491] Funding Source: National Science Foundation
This work aimed to understand the distribution of five bacterial pathogens in O'ahu coastal streams and relate their presence to microbial indicator concentrations, land cover of the surrounding watersheds, and physical-chemical measures of stream water quality. Twenty-two streams were sampled four times (in December and March, before sunrise and at high noon) to capture seasonal and time of day variation. Salmonella, Campylobacter, Staphylococcus aureus, Vibrio vulnificus, and V. parahaemolyticus were widespread -12 of 22 O'ahu streams had all five pathogens. All stream waters also had detectable concentrations of four fecal indicators and total vibrio with log mean standard deviation densities of 2.2 +/- 0.8 enterococci, 2.7 +/- 0.7 Escherichia coli, 1.1 +/- 0.7 Clostridium perfringens, 1.2 +/- 0.8 F+ coliphages, and 3.6 +/- 0.7 total vibrio per 100 ml. Bivariate associations between pathogens and indicators showed enterococci positively associated with the greatest number of bacterial pathogens. Higher concentrations of enterococci and higher incidence of Campylobacter were found in stream waters collected before sunrise, suggesting these organisms are sensitive to sunlight. multivariate regression models of microbes as a function of land cover and physical-chemical water quality showed positive associations between Salmonella and agricultural and forested land covers, and between S. aureus and urban and agricultural land covers; these results suggested that sources specific to those land covers may contribute these pathogens to streams. Further, significant associations between some microbial targets and physical chemical stream water quality (i.e., temperature, nutrients, turbidity) suggested that organism persistence may be affected by stream characteristics. Results implicate streams as a source of pathogens to coastal waters. Future work is recommended to determine infectious risks of recreational waterbome illness related to O'ahu stream exposures and to mitigate these risks through control of land-based runoff sources. (C) 2011 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据