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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Spatio-temporal variations in pathogenic bacteria in the surface sediments of the Zuari estuary, Goa, India
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Spatio-temporal variations in pathogenic bacteria in the surface sediments of the Zuari estuary, Goa, India

机译：Zuari河口地表沉积物中致病细菌的时空变异，印度果阿

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摘要

Estuaries are hotspots of anthropogenic activities. The deposition of pathogenic bacteria in the sediment and their re-suspension into the water column are influenced by riverine discharge and tides. The abundance of Escherichia coli O157:H7, Shigella spp., Salmonella spp., total coliforms (TC) and Vibrio spp. (Vibrio cholerae (VC), Vibrio parahaemolyticus (VP), Vibrio alginolyticus (VA)) was assessed along with the total bacterial count (TBC) and total viable count (TVC) in surface sediments along the banks of the Zuari estuary, Goa, India. The study was carried out fortnightly for a period of 17 months covering three seasons, i.e. pre-monsoon (PreM), monsoon (MON) and postmonsoon (POM). The spatial and temporal changes in the quality of organic matter were also assessed. The organic matter content was high and rich in carbohydrates and proteins towards upstream sites. The quality of organic matter was influenced by the seasons. E. coli O157: H7 was detected only during MON towards the upstream stations. A negative correlation between TC and TBC with salinity was evident indicating the influence of land run-off. The Shigella spp. and VA were high towards the mouth of the estuary during PreM. However, during POM, the TVC, TC and VP were abundant towards the upstream and VC were abundant at the mouth of the estuary. Among the Vibrios, VP and VA were the most frequently occurring bacteria whereas TC and Shigella spp. were dominant among allochthonous pathogens in the sediments irrespective of space and time. In addition to influence of seasons, the sampling time influenced by tidal condition also played an important role in the population dynamics of pathogenic bacteria in the sediments. Future studies should address the interaction of pathogenic bacteria with suspended particles, their transport and survival in the sediments.
机译：河口是人为活动的热点。沉积物中病原菌的沉积及其再悬浮液进入水塔受到河流排放和潮汐的影响。大肠杆菌O157：H7，Shigella SPP。，Salmonella SPP，总大肠杆菌（TC）和Vibrio SPP。 （VIBRIO Cholerae（VC），VIBRIO Parahaemolyticus（VP），vibrio alginyticticus（VA）以及沿Zuari Zea，Goa的银行的表面沉积物中的总细菌数量（TBC）和总活性计数（TVC），印度。这项研究每两项举行17个月，即覆盖三季，即季风（Prem），季风（Mon）和Postmonsoon（POM）。还评估了有机物质质量的空间和时间变化。有机物质含量高，富含碳水化合物和朝向上游部位的蛋白质。有机物质的质量受到季节的影响。 E. Coli O157：仅在Mon朝向上游站期间检测到H7。 TC与TBC与盐度之间的负相关性是显而易见的，表明土地径流的影响。 Shigella SPP。 VA在Prem河口涌向河口。然而，在POM期间，TVC，TC和VP朝上的上游和VC在河口的口腔中丰富。在Vibrios中，VP和VA是TC和Shigella SPP的最常发生的细菌。无论空间和时间如何，沉积物中的沉积物中的脱苗病原体中都是占优势。除了季节的影响外，受潮汐病症影响的采样时间也在沉积物中致病细菌的人口动态中发挥着重要作用。未来的研究应该解决致病细菌与沉积物中悬浮颗粒的相互作用，其在沉积物中的运输和存活。

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