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Long-term variations in abundance and distribution of sewage pollution indicator and human pathogenic bacteria along the central west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Long-term variations in abundance and distribution of sewage pollution indicator and human pathogenic bacteria along the central west coast of India
 
Creator Rodrigues, V.
Ramaiah, N.
Kakti, S.
Samant, D.
 
Subject pathogenic bacteria
pollution indicators
indicator species
sewage disposal
 
Description Safe water quality criteria on the load and types of microbial populations are important for human use from fishery, tourism and navigational viewpoints. To understand the variations in sewage pollution indicator and certain human pathogenic bacteria, data collected from various locations along central west coast of India during 2002-2007 were analyzed. Water and sediment samples were examined for total viable counts (TVC), pollution indicator bacteria (total coliforms - TC, fecal coliforms - FC and Escherichia coli - EC) and potential pathogens (Vibrio cholerae - VC, Shigella - SH, and Salmonella spp. - SA). In both Mandovi and Zuari estuaries, where fishing and tourist-related activities are sizable and long-term data collection was regular, we observed high counts of TC, FC, VC, SH and SA in particular during monsoon due to increased land runoff. Further, the abundance of TC and FC has increased significantly over the years in the water column to much above either USEPA or India permissible limits. The concentrations of Vibrio cholerae, and Shigella correlated with those of coliforms. Pathogenic bacteria were detected even 20km and/or 25kmoffshore mainly due to dumping of raw or improperly treated sewage effluents either from land, fishing trawlers and/or ships in the anchorage. Higher concentrations of fecal coliforms and pathogenic bacteria in neretic waters signify threats to environmental and human health.
 
Date 2011-01-04T07:00:50Z
2011-01-04T07:00:50Z
2011
 
Type Journal Article
 
Identifier Ecological Indicators, vol.11(2); 2011; 318?327
http://drs.nio.org/drs/handle/2264/3765
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2011] Elsevier
 
Publisher Elsevier