Eukaryotic diversity in premise drinking water using 18S rDNA sequencing: implications for health risks

The goal of this study was to characterize microbial eukaryotes over a 12-month period to provide insight into the occurrence of potential bacterial predators and hosts in premise plumbing. Nearly 6,300 partial 18S rRNA gene sequences from 24 hot (36.9–39.0 °C) and cold (6.8–29.1 °C) drinking water...

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Veröffentlicht in:Environmental science and pollution research international 2013-09, Vol.20 (9), p.6351-6366
Hauptverfasser: Buse, Helen Y., Lu, Jingrang, Struewing, Ian T., Ashbolt, Nicholas J.
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Lu, Jingrang
Struewing, Ian T.
Ashbolt, Nicholas J.
description The goal of this study was to characterize microbial eukaryotes over a 12-month period to provide insight into the occurrence of potential bacterial predators and hosts in premise plumbing. Nearly 6,300 partial 18S rRNA gene sequences from 24 hot (36.9–39.0 °C) and cold (6.8–29.1 °C) drinking water samples were analyzed and classified into major eukaryotic groups. Each major group, consisting of free-living amoebae (FLA)/protozoa, algae, copepods, dinoflagellates, fungi, nematodes, and unique uncultured eukaryotic sequences, showed limited diversity dominated by a few distinct populations, which may be characteristic of oligotrophic environments. Changes in the relative abundance of predators such as nematodes, copepods, and FLA appear to be related to temperature and seasonal changes in water quality. Sequences nearly identical to FLA such as Hartmannella vermiformis , Echinamoeba thermarmum , Pseudoparamoeba pagei , Protacanthamoeba bohemica , Platyamoeba sp., and Vannella sp. were obtained. In addition to FLA, various copepods, rotifers, and nematodes have been reported to internalize viral and bacterial pathogens within drinking water systems thus potentially serving as transport hosts; implications of which are discussed further. Increasing the knowledge of eukaryotic occurrence and their relationship with potential pathogens should aid in assessing microbial risk associated with various eukaryotic organisms in drinking water.
doi_str_mv 10.1007/s11356-013-1646-5
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Nearly 6,300 partial 18S rRNA gene sequences from 24 hot (36.9–39.0 °C) and cold (6.8–29.1 °C) drinking water samples were analyzed and classified into major eukaryotic groups. Each major group, consisting of free-living amoebae (FLA)/protozoa, algae, copepods, dinoflagellates, fungi, nematodes, and unique uncultured eukaryotic sequences, showed limited diversity dominated by a few distinct populations, which may be characteristic of oligotrophic environments. Changes in the relative abundance of predators such as nematodes, copepods, and FLA appear to be related to temperature and seasonal changes in water quality. Sequences nearly identical to FLA such as Hartmannella vermiformis , Echinamoeba thermarmum , Pseudoparamoeba pagei , Protacanthamoeba bohemica , Platyamoeba sp., and Vannella sp. were obtained. In addition to FLA, various copepods, rotifers, and nematodes have been reported to internalize viral and bacterial pathogens within drinking water systems thus potentially serving as transport hosts; implications of which are discussed further. 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In addition to FLA, various copepods, rotifers, and nematodes have been reported to internalize viral and bacterial pathogens within drinking water systems thus potentially serving as transport hosts; implications of which are discussed further. 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subjects Activated carbon
Algae
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Bacteria - genetics
Bacteria - isolation & purification
Cloning
Cold
Copepoda
Deoxyribonucleic acid
DNA
Drinking water
Drinking Water - parasitology
Drinking Water - standards
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental protection
Eukaryota - genetics
Eukaryota - isolation & purification
Eukaryotes
Fungi
Gene amplification
Gene Expression Regulation
Hartmannella vermiformis
Health risk assessment
Health risks
Humans
Laboratories
Marine
Nematoda
Nematodes
Oligotrophic environments
Pathogens
Phylogeny
Platyamoeba
Predators
Protozoa
R&D
Relative abundance
Research & development
Research Article
RNA, Ribosomal, 18S - genetics
Rotifera
rRNA 18S
Seasonal variations
Seasons
Vannella
Waste Water Technology
Water analysis
Water Management
Water Pollution Control
Water quality
Water sampling
Water treatment plants
title Eukaryotic diversity in premise drinking water using 18S rDNA sequencing: implications for health risks
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