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Titolo:
Pathogenic-bacterial water contamination in mountainous catchments
Autore:
Schaffter, N; Parriaux, A;
Indirizzi:
Swiss Fed Inst Technol, DGC Ecublens, GEOLEP, Ecole Polytech Fed Lausanne,Lab Geol, CH-1015 Lausanne, Switzerland Swiss Fed Inst Technol Lausanne Switzerland CH-1015 ausanne, Switzerland
Titolo Testata:
WATER RESEARCH
fascicolo: 1, volume: 36, anno: 2002,
pagine: 131 - 139
SICI:
0043-1354(200201)36:1<131:PWCIMC>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
ESCHERICHIA-COLI; THERMOPHILIC CAMPYLOBACTERS; YERSINIA-ENTEROCOLITICA; SURVIVAL; GROUNDWATER; QUALITY; STREAM;
Keywords:
hydrogeology; bacteriology; pathogens; water; contamination;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Parriaux, A Swiss Fed Inst Technol, DGC Ecublens, GEOLEP, Ecole Polytech Fed Lausanne,Lab Geol, CH-1015 Lausanne, Switzerland Swiss Fed Inst TechnolLausanne Switzerland CH-1015 tzerland
Citazione:
N. Schaffter e A. Parriaux, "Pathogenic-bacterial water contamination in mountainous catchments", WATER RES, 36(1), 2002, pp. 131-139

Abstract

This space-time study of bacteriological response compared the presence ofpathogens with indicators contained in surface and groundwater in mountainous regions. A systematic search for bacteria such as Listeria, Salmonella,Campylobacter and Yersinia carried out simultaneously with a search for indicators has shown that these waters can occasionally contain potentially pathogens, though these are generally to be found in small quantities. The most common pathogens found are Campylobacter and Listeria. Salmonella has never been isolated. The presence of pathogens is usually accompanied by thepresence of classic indicators of contamination such as Escherichia coli, enterococci and other aerobic bacteria. Exceptions are only to be observed in cases of samples presenting very low numbers of pathogens. Such low pathogen levels have a minimal impact on human health; but we cannot exclude that, during periods affected by specific conditions, higher levels might temporarily occur. Our research has demonstrated that classic indicators can be considered as efficient detectors of pathogens in most cases. When these indicators are used systematically and regularly, the human health hazard can be qualified as low but not negligible. The presence of pathogens, together with their survival capacity, brings the protection measures currently applied to safeguard drinking waters sharply into question. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 20/02/20 alle ore 12:47:09