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Detection of Emerging and Re-Emerging Pathogens in Surface Waters Close to an Urban Area

Current knowledge about the spread of pathogens in aquatic environments is scarce probably because bacteria, viruses, algae and their toxins tend to occur at low concentrations in water, making them very difficult to measure directly. The purpose of this study was the development and validation of t...

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Autores principales: Marcheggiani, Stefania, D’Ugo, Emilo, Puccinelli, Camilla, Giuseppetti, Roberto, D’Angelo, Anna Maria, Gualerzi, Claudio Orlando, Spurio, Roberto, Medlin, Linda K., Guillebault, Delphine, Weigel, Wilfried, Helmi, Karim, Mancini, Laura
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4454982/
https://www.ncbi.nlm.nih.gov/pubmed/26006125
http://dx.doi.org/10.3390/ijerph120505505
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author Marcheggiani, Stefania
D’Ugo, Emilo
Puccinelli, Camilla
Giuseppetti, Roberto
D’Angelo, Anna Maria
Gualerzi, Claudio Orlando
Spurio, Roberto
Medlin, Linda K.
Guillebault, Delphine
Weigel, Wilfried
Helmi, Karim
Mancini, Laura
author_facet Marcheggiani, Stefania
D’Ugo, Emilo
Puccinelli, Camilla
Giuseppetti, Roberto
D’Angelo, Anna Maria
Gualerzi, Claudio Orlando
Spurio, Roberto
Medlin, Linda K.
Guillebault, Delphine
Weigel, Wilfried
Helmi, Karim
Mancini, Laura
author_sort Marcheggiani, Stefania
collection PubMed
description Current knowledge about the spread of pathogens in aquatic environments is scarce probably because bacteria, viruses, algae and their toxins tend to occur at low concentrations in water, making them very difficult to measure directly. The purpose of this study was the development and validation of tools to detect pathogens in freshwater systems close to an urban area. In order to evaluate anthropogenic impacts on water microbiological quality, a phylogenetic microarray was developed in the context of the EU project µAQUA to detect simultaneously numerous pathogens and applied to samples from two different locations close to an urban area located upstream and downstream of Rome in the Tiber River. Furthermore, human enteric viruses were also detected. Fifty liters of water were collected and concentrated using a hollow-fiber ultrafiltration approach. The resultant concentrate was further size-fractionated through a series of decreasing pore size filters. RNA was extracted from pooled filters and hybridized to the newly designed microarray to detect pathogenic bacteria, protozoa and toxic cyanobacteria. Diatoms as indicators of the water quality status, were also included in the microarray to evaluate water quality. The microarray results gave positive signals for bacteria, diatoms, cyanobacteria and protozoa. Cross validation of the microarray was performed using standard microbiological methods for the bacteria. The presence of oral-fecal transmitted human enteric-viruses were detected using q-PCR. Significant concentrations of Salmonella, Clostridium, Campylobacter and Staphylococcus as well as Hepatitis E Virus (HEV), noroviruses GI (NoGGI) and GII (NoGII) and human adenovirus 41 (ADV 41) were found in the Mezzocammino site, whereas lower concentrations of other bacteria and only the ADV41 virus was recovered at the Castel Giubileo site. This study revealed that the pollution level in the Tiber River was considerably higher downstream rather than upstream of Rome and the downstream location was contaminated by emerging and re-emerging pathogens.
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spelling pubmed-44549822015-06-04 Detection of Emerging and Re-Emerging Pathogens in Surface Waters Close to an Urban Area Marcheggiani, Stefania D’Ugo, Emilo Puccinelli, Camilla Giuseppetti, Roberto D’Angelo, Anna Maria Gualerzi, Claudio Orlando Spurio, Roberto Medlin, Linda K. Guillebault, Delphine Weigel, Wilfried Helmi, Karim Mancini, Laura Int J Environ Res Public Health Article Current knowledge about the spread of pathogens in aquatic environments is scarce probably because bacteria, viruses, algae and their toxins tend to occur at low concentrations in water, making them very difficult to measure directly. The purpose of this study was the development and validation of tools to detect pathogens in freshwater systems close to an urban area. In order to evaluate anthropogenic impacts on water microbiological quality, a phylogenetic microarray was developed in the context of the EU project µAQUA to detect simultaneously numerous pathogens and applied to samples from two different locations close to an urban area located upstream and downstream of Rome in the Tiber River. Furthermore, human enteric viruses were also detected. Fifty liters of water were collected and concentrated using a hollow-fiber ultrafiltration approach. The resultant concentrate was further size-fractionated through a series of decreasing pore size filters. RNA was extracted from pooled filters and hybridized to the newly designed microarray to detect pathogenic bacteria, protozoa and toxic cyanobacteria. Diatoms as indicators of the water quality status, were also included in the microarray to evaluate water quality. The microarray results gave positive signals for bacteria, diatoms, cyanobacteria and protozoa. Cross validation of the microarray was performed using standard microbiological methods for the bacteria. The presence of oral-fecal transmitted human enteric-viruses were detected using q-PCR. Significant concentrations of Salmonella, Clostridium, Campylobacter and Staphylococcus as well as Hepatitis E Virus (HEV), noroviruses GI (NoGGI) and GII (NoGII) and human adenovirus 41 (ADV 41) were found in the Mezzocammino site, whereas lower concentrations of other bacteria and only the ADV41 virus was recovered at the Castel Giubileo site. This study revealed that the pollution level in the Tiber River was considerably higher downstream rather than upstream of Rome and the downstream location was contaminated by emerging and re-emerging pathogens. MDPI 2015-05-22 2015-05 /pmc/articles/PMC4454982/ /pubmed/26006125 http://dx.doi.org/10.3390/ijerph120505505 Text en © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Marcheggiani, Stefania
D’Ugo, Emilo
Puccinelli, Camilla
Giuseppetti, Roberto
D’Angelo, Anna Maria
Gualerzi, Claudio Orlando
Spurio, Roberto
Medlin, Linda K.
Guillebault, Delphine
Weigel, Wilfried
Helmi, Karim
Mancini, Laura
Detection of Emerging and Re-Emerging Pathogens in Surface Waters Close to an Urban Area
title Detection of Emerging and Re-Emerging Pathogens in Surface Waters Close to an Urban Area
title_full Detection of Emerging and Re-Emerging Pathogens in Surface Waters Close to an Urban Area
title_fullStr Detection of Emerging and Re-Emerging Pathogens in Surface Waters Close to an Urban Area
title_full_unstemmed Detection of Emerging and Re-Emerging Pathogens in Surface Waters Close to an Urban Area
title_short Detection of Emerging and Re-Emerging Pathogens in Surface Waters Close to an Urban Area
title_sort detection of emerging and re-emerging pathogens in surface waters close to an urban area
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4454982/
https://www.ncbi.nlm.nih.gov/pubmed/26006125
http://dx.doi.org/10.3390/ijerph120505505
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