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Immediate Impact of Hurricane Lane on Microbiological Quality of Coastal Water in Hilo Bay, Hawaii
Environmental Science & Technology ( IF 11.4 ) Pub Date : 2021-02-11 , DOI: 10.1021/acs.est.0c07082
Prakit Saingam 1 , Bo Li 1 , Shihwu Sung 2 , Tao Yan 1
Affiliation  

Hurricanes and associated stormwater runoff events are expected to greatly impact coastal marine water quality, yet little is known about their immediate effects on microbiological quality of near-shore water. This study sampled Hilo Bay immediately after the impact of Hurricane Lane to understand the spatial and temporal variations of the abundance and diversity of fecal indicator enterococci, common fecal pathogens, and antibiotic resistance genes (ARGs). Water samples from seven sampling sites over 7 days were collected and analyzed, which showed that the overall microbiological water quality parameters [enterococci geometric mean (GM): 6–22 cfu/100 mL] fell within water quality standards and that the temporal dynamics indicated continuing water quality recovery. However, considerable spatial variation was observed, with the most contaminated site exhibiting impaired water quality (GM = 144 cfu/100 mL). The Enterococcus population also showed distinct genotypic composition at the most contaminated site. Although marker genes for typical fecal pathogens (invA for Salmonella, hipO for Campylobacter, mip for Legionella pneumophila, and eaeA for enteropathogenic Escherichia coli) were not detected, various ARGs (ermB, qurS, tetM, blaTEM, and sul1) and integron-associated integrase intI1 were detected at high levels. Understanding the temporal and spatial variation of microbiological water quality at fine granularity is important for balancing economic and recreational uses of coastal water and the protection of public health post the impact of major hurricane events.

中文翻译:

飓风车道对夏威夷希洛湾沿海水微生物质量的直接影响

飓风和相关的雨水径流事件预计将极大地影响沿海海洋水质,但对其近海水微生物质量的直接影响知之甚少。这项研究在飓风巷影响后立即对希洛湾进行了采样,以了解粪便指示肠球菌,常见粪便病原体和抗生素抗性基因(ARG)的丰富度和多样性的时空变化。收集并分析了7个采样点在7天内的水样,结果表明总体微生物水质参数[肠球菌几何平均值(GM):6–22 cfu / 100 mL]均在水质标准之内,并且表明时间动态持续的水质恢复。但是,观察到很大的空间变化,污染最严重的地点显示出水质受损(GM = 144 cfu / 100 mL)。这肠球菌在最受污染的部位也显示出独特的基因型组成。虽然典型的粪便病原体的标记基因(invA的用于沙门氏菌HIPO对于弯曲杆菌MIP嗜肺军团菌,和EAEA为肠大肠杆菌中未检测到),各种的ARG(ermBqurStetMBLA TEM,和SUL 1)和整合-相关的整合INTI高水平检测到1个。了解细粒度微生物水质的时空变化对于平衡沿海水域的经济和休闲用途以及在重大飓风事件发生后保护公共健康非常重要。
更新日期:2021-03-02
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