Population similarity analysis of indicator bacteria for source prediction of fecal pollution in a recreational coastal lake

Ahmed, Warish, Hargreaves, Megan, Goonetilleke, Ashantha, & Katouli, Mohammad (2008) Population similarity analysis of indicator bacteria for source prediction of fecal pollution in a recreational coastal lake. Marine Pollution Bulletin, 56(8), pp. 1469-1475.

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Biochemical fingerprinting (BF) databases of 524 enterococci and 571 Escherichia coli isolates and an antibiotic resistance analysis (ARA) database comprising of 380 E. coli isolates from four suspected sources (i.e. dogs, chickens, waterfowls, and human sewage) were developed to predict the sources of faecal pollution in a recreational coastal lake. Twenty water samples representing four sampling episodes were collected from five sites and the enterococci and E. coli population from each site were compared with those of the databases. The degree of similarity between bacterial populations was measured as population similarity (Sp) coefficient. Using the BF-database, bacterial populations of waterfowls showed the highest similarity with the water samples followed by a sewage treatment plant (STP). Higher population similarities were found between samples from STP and water samples especially at two sites (T2 and T3) which were located near the sewerage pipes collecting wastewater from the study area. When using the ARA-database, the highest similarity was found between E. coli populations from STP and water samples at sites T2 and T4. Both faecal indicators and as well as methods predicted human faecal pollution, possibly through leakage from submerged sewerage pipes. The results indicated that the Sp-analysis of faecal indicator bacterial populations from suspected sources and water samples can be used as a simple tool to predict the source(s) of faecal pollution in surface waters.

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ID Code: 14122
Item Type: Journal Article
Refereed: Yes
Keywords: Faecal pollution, Microbial source tracking, Biochemical fingerprinting, Antibiotic resistance analysis, Population similarity analysis
DOI: 10.1016/j.marpolbul.2008.04.043
ISSN: 0025-326X
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2008 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 22 Jul 2008 00:00
Last Modified: 29 Feb 2012 13:43

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