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Elfellaki N, Berrouch S, Biary A, Goïta S, Rafi H, Lachkar H, Dehhani O, Rougemont AD, Bourlet T, Hafid JE. Comparison of four concentration methods of adenovirus, norovirus and rotavirus in tap water. J Virol Methods 2024; 330:115013. [PMID: 39209160 DOI: 10.1016/j.jviromet.2024.115013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 08/20/2024] [Accepted: 08/26/2024] [Indexed: 09/04/2024]
Abstract
Human enteric viruses, as adenovirus (HAdV), norovirus (HuNoV) and rotavirus (RVA) are significant causes of gastroenteritis associated with consumption of contaminated water worldwide. Various methods have been described for their detection and monitoring in water. The aim of this study was to compare the performance of four conditions for concentrating HAdV, HuNoV and RVA from water matrices, in order to develop a single protocol that could simultaneously concentrate all target viruses from tap water. The tested conditions were based on the adsorption-elution using electronegative filters, in which we evaluated cation-coated filtration by MgCl2 with or without acid rinse by H2SO4 and two elution buffers, namely NaOH and tris-glycine-beef extract. Genomic material was extracted and amplified by real-time PCR and real-time RT-PCR using commercial kits. Based on the statistical analysis of amplification results (cycles of quantification), the condition involving cation-coated filtration by MgCl2 using electronegative filters with acid rinse by H2SO4 combined with NaOH elution allowed efficient recovery of both HAdV, HuNoV and RVA from tap water compared to the other conditions. These findings confirm the effectiveness of the approach used to monitor three major enteric viruses in tap water.
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Affiliation(s)
- Nouhaila Elfellaki
- Laboratory of Bioresources and Food Safety, Faculty of Sciences and Technology, Cadi Ayyad University, Marrakech, Morocco
| | - Salma Berrouch
- Laboratory of Bioresources and Food Safety, Faculty of Sciences and Technology, Cadi Ayyad University, Marrakech, Morocco; Higher School of Technology of El Kelâa des Sraghna, Cadi Ayyad University, El Kelâa des Sraghna, Morocco
| | - Abdelkader Biary
- Laboratory of Bioresources and Food Safety, Faculty of Sciences and Technology, Cadi Ayyad University, Marrakech, Morocco
| | - Simeon Goïta
- Laboratory of Bioresources and Food Safety, Faculty of Sciences and Technology, Cadi Ayyad University, Marrakech, Morocco
| | - Houda Rafi
- Laboratory of Bioresources and Food Safety, Faculty of Sciences and Technology, Cadi Ayyad University, Marrakech, Morocco
| | - Hibatallah Lachkar
- Laboratory of Bioresources and Food Safety, Faculty of Sciences and Technology, Cadi Ayyad University, Marrakech, Morocco
| | - Oussama Dehhani
- Laboratory of Bioresources and Food Safety, Faculty of Sciences and Technology, Cadi Ayyad University, Marrakech, Morocco
| | - Alexis de Rougemont
- National Reference Centre for Gastroenteritis Viruses, Laboratory of Virology, University Hospital of Dijon Bourgogne, France
| | - Thomas Bourlet
- Infectious Agents and Hygiene Department, University Hospital of Saint Etienne, Saint-Etienne, France
| | - Jamal Eddine Hafid
- Laboratory of Bioresources and Food Safety, Faculty of Sciences and Technology, Cadi Ayyad University, Marrakech, Morocco.
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Gwenzi W, Adelodun B, Kumar P, Ajibade FO, Silva LFO, Choi KS, Selvarajan R, Abia ALK, Gholipour S, Mohammadi F, Nikaeen M. Human viral pathogens in the wastewater-source water-drinking water continuum: Evidence, health risks, and lessons for future outbreaks in low-income settings. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 918:170214. [PMID: 38278242 DOI: 10.1016/j.scitotenv.2024.170214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 01/10/2024] [Accepted: 01/14/2024] [Indexed: 01/28/2024]
Abstract
Human viral pathogens, including SARS-CoV-2 continue to attract public and research attention due to their disruption of society, global health, and the economy. Several earlier reviews have investigated the occurrence and fate of SARS-CoV-2 in wastewater, and the potential to use such data in wastewater-based epidemiology. However, comprehensive reviews tracking SARS-CoV-2 and other viral pathogens in the wastewater-water-drinking water continuum and the associated risk assessment are still lacking. Therefore, to address this gap, the present paper makes the following contributions: (1) critically examines the early empirical results to highlight the occurrence and stability of SARS-CoV-2 in the wastewater-source water-drinking water continuum, (2) discusses the anthropogenic and hydro(geo)logical processes controlling the circulation of SARS-CoV-2 in the wastewater-source water-drinking water continuum, (3) discusses the risky behaviour, drivers and high-risk settings in the wastewater-source water-drinking water continuum, (4) uses the available empirical data on SARS-CoV-2 occurrence in the wastewater-source water-drinking water continuum to discuss human health risks from multiple exposure pathways, gendered aspects of SARS-CoV-2 transmission via shared on-site sanitation systems, and (5) develops and risk mitigation strategy based on the available empirical evidence and quantitative human risk assessment data. Finally, it presents a comprehensive research agenda on SARS-CoV-2/COVID-19 to guide the mitigation of future similar outbreaks in low-income settings.
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Affiliation(s)
- Willis Gwenzi
- Biosystems and Environmental Engineering Research Group, 380 New Adylin, Westgate, Harare, Zimbabwe; Currently Alexander von Humboldt Fellow and Guest/Visiting Professor at: Grassland Science and Renewable Plant Resources, Faculty of Organic Agricultural Sciences, Universität Kassel, Steinstraße 19, D-37213 Witzenhausen, Germany; Leibniz-Institut für Agrartechnik und Bioökonomie e.V. (ATB), Max-Eyth-Allee 100, D-14469, Potsdam, Germany.
| | - Bashir Adelodun
- Department of Agricultural Civil Engineering, Kyungpook National University, Daegu 41566, Republic of Korea; Department of Agricultural and Biosystems Engineering, University of Ilorin, PMB 1515, Ilorin 240003, Nigeria; Institute of Agricultural Science & Technology, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Pankaj Kumar
- Agro-Ecology and Pollution Research Laboratory, Department of Zoology and Environmental Science, Gurukula Kangri (Deemed to Be University), Haridwar 249404, India; Research and Development Division, Society for AgroEnvironmental Sustainability, Dehradun 248007, India.
| | - Fidelis Odedishemi Ajibade
- Department of Civil and Environmental Engineering, Federal University of Technology, PMB 704, Akure, 340001, Nigeria.
| | - Luis F O Silva
- Department of Civil and Environmental Engineering, Universidad de la Costa, Calle 58 #55-66, 080002 Barranquilla, Atlàntico, Colombia.
| | - Kyung Sook Choi
- Department of Agricultural Civil Engineering, Kyungpook National University, Daegu 41566, Republic of Korea; Institute of Agricultural Science & Technology, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Ramganesh Selvarajan
- Department of Environmental Sciences, College of Agricultural and Environmental Sciences, University of South Africa, Florida branch, Johannesburg, South Africa
| | - Akebe Luther King Abia
- Antimicrobial Research Unit, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa; Environmental Research Foundation, Westville 3630, Kwazulu-Natal, South Africa
| | - Sahar Gholipour
- Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Farzaneh Mohammadi
- Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mahnaz Nikaeen
- Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran; Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
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3
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Owliaee I, Khaledian M, Mahmoudvand S, Amini R, Abney SE, Beikpour F, Jalilian FA. Global investigation of the presence of adenovirus in different types of water resources: a systematic review. Virusdisease 2024; 35:55-65. [PMID: 38817402 PMCID: PMC11133282 DOI: 10.1007/s13337-023-00857-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 12/18/2023] [Indexed: 06/01/2024] Open
Abstract
Waterborne viruses such as adenoviruses cause major health problems in the world. Human adenoviruses are the second leading cause of childhood gastroenteritis worldwide. In recent years, the presence of the virus in aquatic resources has been shown in several studies. In this paper, the global presence of adenovirus in different types of water resources are reviewed through studying several surveys conducted in different countries worldwide. We designed one search study to collect the maximum number of related articles to this subject in international databases search engine via relevant keywords. After reviewing the articles, the most relevant ones were selected, and after classification and extracting the required information, they were reported in the tables presented in this study. In general, it was found that the highest rate of the presence of adenoviruses has been reported in sewage water, inlet, and outlet of the treatment plant while the lowest rate of the presence of adenovirus in the dam water. These findings demonstrate that treatment plant system has weakness in removing the adenovirus and are strongly recommended for treatment plants to use new and better protocols to remove this virus. In addition, appropriate diagnostic methods that combines molecular biological technique with infectivity assay should be implemented for detection of adenoviruses in water resources.
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Affiliation(s)
- Iman Owliaee
- Department of Medical Virology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mehran Khaledian
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Shahab Mahmoudvand
- Department of Medical Virology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Razieh Amini
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Sarah E. Abney
- Garcias Robles Fulbright Postdoctoral Scholar at El Centro de Investigacion Cientifica de Yucatan, Mérida, Mexico
| | - Farzad Beikpour
- Department of Food Safety, Nutrition, and Veterinary Public Health, Istituto Superiore di Sanità, Rome, Italy
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Farid Azizi Jalilian
- Department of Medical Virology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
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Panizzolo M, Gea M, Carraro E, Gilli G, Bonetta S, Pignata C. Occurrence of human pathogenic viruses in drinking water and in its sources: A review. J Environ Sci (China) 2023; 132:145-161. [PMID: 37336605 DOI: 10.1016/j.jes.2022.07.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 07/19/2022] [Accepted: 07/21/2022] [Indexed: 06/21/2023]
Abstract
Since many waterborne diseases are caused by human pathogenic viruses, virus monitoring of drinking water (DW) and DW sources is crucial for public health. Therefore, the aim of this review was to describe the occurrence of human pathogenic viruses in DW and DW sources; the occurrence of two viruses proposed as novel indicators of human faecal contamination (Pepper mild mottle virus and Tobacco mosaic virus) was also reported. This research was focused on articles that assessed viral occurrence using molecular methods in the surface water used for DW production (SW-D), groundwater used for DW production (GW-D), DW and bottled-DW (BW). A total of 1544 studies published in the last 10 years were analysed, and 79 were ultimately included. In considering the detection methods, filtration is the most common concentration technique, while quantitative polymerase chain reaction is the most common quantification technique. Regarding virus occurrence in SW-D, GW-D, and DW, high percentages of positive samples were reported for adenovirus, polyomavirus and Pepper mild mottle virus. Viral genomes were frequently detected in SW-D and rarely in GW-D, suggesting that GW-D may be a safe DW source. Viral genomes were also detected in DW, posing a possible threat to human health. The lowest percentages of positive samples were found in Europe, while the highest were found in Asia and South America. Only three articles assessed viral occurrence in BW. This review highlights the lack of method standardization and the need for legislation updates.
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Affiliation(s)
- Marco Panizzolo
- Department of Public Health and Pediatrics, University of Torino, Piazza Polonia 94, 10126, Torino, Italy
| | - Marta Gea
- Department of Public Health and Pediatrics, University of Torino, Piazza Polonia 94, 10126, Torino, Italy.
| | - Elisabetta Carraro
- Department of Public Health and Pediatrics, University of Torino, Piazza Polonia 94, 10126, Torino, Italy
| | - Giorgio Gilli
- Department of Public Health and Pediatrics, University of Torino, Piazza Polonia 94, 10126, Torino, Italy
| | - Silvia Bonetta
- Department of Life Sciences and Systems Biology, University of Torino, via Accademia Albertina 13, 10123, Torino, Italy
| | - Cristina Pignata
- Department of Public Health and Pediatrics, University of Torino, Piazza Polonia 94, 10126, Torino, Italy
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Lanrewaju AA, Enitan-Folami AM, Sabiu S, Edokpayi JN, Swalaha FM. Global public health implications of human exposure to viral contaminated water. Front Microbiol 2022; 13:981896. [PMID: 36110296 PMCID: PMC9468673 DOI: 10.3389/fmicb.2022.981896] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 08/05/2022] [Indexed: 01/08/2023] Open
Abstract
Enteric viruses are common waterborne pathogens found in environmental water bodies contaminated with either raw or partially treated sewage discharge. Examples of these viruses include adenovirus, rotavirus, noroviruses, and other caliciviruses and enteroviruses like coxsackievirus and polioviruses. They have been linked with gastroenteritis, while some enteric viruses have also been implicated in more severe infections such as encephalitis, meningitis, hepatitis (hepatitis A and E viruses), cancer (polyomavirus), and myocarditis (enteroviruses). Therefore, this review presents information on the occurrence of enteric viruses of public health importance, diseases associated with human exposure to enteric viruses, assessment of their presence in contaminated water, and their removal in water and wastewater sources. In order to prevent illnesses associated with human exposure to viral contaminated water, we suggest the regular viral monitoring of treated wastewater before discharging it into the environment. Furthermore, we highlight the need for more research to focus on the development of more holistic disinfection methods that will inactivate waterborne viruses in municipal wastewater discharges, as this is highly needed to curtail the public health effects of human exposure to contaminated water. Moreover, such a method must be devoid of disinfection by-products that have mutagenic and carcinogenic potential.
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Affiliation(s)
| | | | - Saheed Sabiu
- Department of Biotechnology and Food Science, Durban University of Technology, Durban, South Africa
| | - Joshua Nosa Edokpayi
- Water and Environmental Management Research Group, Engineering and Agriculture, University of Venda, Thohoyandou, South Africa
| | - Feroz Mahomed Swalaha
- Department of Biotechnology and Food Science, Durban University of Technology, Durban, South Africa
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6
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Lima FS, Scalize PS, Gabriel EFM, Gomes RP, Gama AR, Demoliner M, Spilki FR, Vieira JDG, Carneiro LC. Escherichia coli, Species C Human Adenovirus, and Enterovirus in Water Samples Consumed in Rural Areas of Goiás, Brazil. FOOD AND ENVIRONMENTAL VIROLOGY 2022; 14:77-88. [PMID: 34792781 DOI: 10.1007/s12560-021-09504-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 11/08/2021] [Indexed: 06/13/2023]
Abstract
Rural environments lack basic sanitation services. Facilities for obtaining water and disposing sewage are often under the initiative of each resident, who may not be able to build and maintain them properly. Thus, water for human consumption is subject to fecal contamination and, consequently, the presence of waterborne pathogens, such as enteric viruses. This study evaluated fecal contamination of water samples from individual sources used for domestic water supply on small farms in the state of Goiás, Brazil. Samples were collected from 78 houses whose water sources were tubular wells, dug wells, springs, and surface waters. Escherichia coli (EC) bacteria, analyzed by the defined chromogenic substrate method, was used as a traditional indicator of fecal contamination. The enteric viruses Human mastadenovirus (HAdV) and Enterovirus (EV), analyzed by qPCR, were tested as complementary indicators of fecal contamination. At least one of these markers was found in 89.7% of the samples. Detection rates were 79.5% for EC, 52.6% for HAdV, and 5.1% for EV. The average concentration for EC was 8.82 × 101 most probable number (MPN) per 100 mL, while for HAdV and EV the concentrations were 7.51 × 105 and 1.89 × 106 genomic copies (GC) per liter, respectively. EC was the most frequent marker in ground and surface water samples. HAdV was detected significantly more frequently in groundwater than in surface water and was more efficient in indicating contamination in tubular wells. There was no association of frequencies or correlation of concentrations between EC and HAdV. HAdV indicated human fecal contamination and performed well as a complementary indicator. The results reveal that a large part of the analyzed population is vulnerable to waterborne diseases caused by enteric pathogens.
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Affiliation(s)
- Fernando Santos Lima
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brazil.
| | - Paulo Sérgio Scalize
- Escola de Engenharia Civil e Ambiental, Universidade Federal de Goiás, Goiânia, GO, 74605-220, Brazil
| | | | - Raylane Pereira Gomes
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brazil
| | - Aline Rodrigues Gama
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brazil
| | - Meriane Demoliner
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, RS, 93352-075, Brazil
| | - Fernando Rosado Spilki
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, RS, 93352-075, Brazil
| | | | - Lilian Carla Carneiro
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brazil
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Detection and molecular characterization of enteric adenovirus in treated wastewater in the Brazilian Federal District. SN APPLIED SCIENCES 2021. [DOI: 10.1007/s42452-021-04678-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
AbstractHuman enteric viruses, such as enteric adenoviruses (HAdV), are known to be involved with gastrointestinal disorders, especially acute gastroenteritis. Several studies have used HAdV as an indicator of water quality, since they are considered highly stable and widely distributed viruses in water matrices. The aim of this study was to detect and genotype HAdVs in water matrices impacted by discharges of treated effluents from wastewater treatment plants (WWTPs). Wastewater treatment plants from the sanitary system of the Brazilian Federal District were assessed in 2018 and 2019. Samples were collected upstream and downstream from discharge points for each WWTP. Viral concentration based on adsorption-elution and conventional PCR was used for molecular detection, and positive samples were sequenced for phylogenetic analysis. Pluviosity data for the period in which the samples were collected were obtained. Our results demonstrated the presence of HAdVs in 27.2% (61/224) of the samples. The positivity was significantly higher in downstream samples compared to upstream. Moreover, the HAdV positivity was higher in downstream samples collected from receiving water bodies impacted by secondary-level WWTPs in comparison with those impacted by tertiary-level WWTPs. Phylogenetic analysis demonstrated the presence of genotypes 40 and 41, with prevalence of HAdV genotype 41. Despite the predominance of HAdV-41, an increasing frequency of the HAdV-40 was associated with higher pluviosity. In conclusion, this study is the first documentation in the Brazilian Federal District dealing with the prevalence and diversity of HAdVs in several WWTP, along with their correlation with rainfall index.
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Demoliner M, Gularte JS, Girardi V, de Almeida PR, Weber MN, Eisen AKA, Fleck JD, Spilki FR. SARS-CoV-2 and COVID-19: A perspective from environmental virology. Genet Mol Biol 2021; 44:e20200228. [PMID: 33710254 PMCID: PMC7961391 DOI: 10.1590/1678-4685-gmb-2020-0228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 01/18/2021] [Indexed: 11/12/2023] Open
Abstract
December 2019 marked the beginning of the current Coronavirus disease pandemic (COVID-19). Severe acute respiratory syndrome-related coronavirus 2 (SARS-CoV-2) was identified as the causative agent of a viral pneumonia outbreak in Wuhan, Hubei Province, China. The alarming spread levels and clinical severity elevated the status of COVID-19 to the global pandemic by the World Health Organization. In 6 months, more than 25 million cases of infected people and more than 890,000 deaths by COVID-19 had been reported worldwide. The main goal of this review is to shed light upon the current COVID-19 epidemic situation in Brazil with a health approach highlighting some unique environmental, animal and epidemiological aspects.
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Affiliation(s)
- Meriane Demoliner
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, RS, Brazil
- Universidade Feevale, Programa de Pós-Graduação em Qualidade Ambiental, Novo Hamburgo, RS, Brazil
| | - Juliana Schons Gularte
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, RS, Brazil
- Universidade Feevale, Programa de Pós-Graduação em Qualidade Ambiental, Novo Hamburgo, RS, Brazil
| | - Viviane Girardi
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, RS, Brazil
| | - Paula Rodrigues de Almeida
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, RS, Brazil
- Universidade Feevale, Programa de Pós-Graduação em Qualidade Ambiental, Novo Hamburgo, RS, Brazil
| | - Matheus Nunes Weber
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, RS, Brazil
- Universidade Feevale, Mestrado Acadêmico em Virologia, Novo Hamburgo, RS, Brazil
| | - Ana Karolina Antunes Eisen
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, RS, Brazil
- Universidade Feevale, Mestrado Acadêmico em Virologia, Novo Hamburgo, RS, Brazil
| | - Juliane Deise Fleck
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, RS, Brazil
- Universidade Feevale, Programa de Pós-Graduação em Qualidade Ambiental, Novo Hamburgo, RS, Brazil
- Universidade Feevale, Mestrado Acadêmico em Virologia, Novo Hamburgo, RS, Brazil
| | - Fernando Rosado Spilki
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, RS, Brazil
- Universidade Feevale, Programa de Pós-Graduação em Qualidade Ambiental, Novo Hamburgo, RS, Brazil
- Universidade Feevale, Mestrado Acadêmico em Virologia, Novo Hamburgo, RS, Brazil
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Janahi EM, Mustafa S, Parkar SFD, Naser HA, Eisa ZM. Detection of Enteric Viruses and Bacterial Indicators in a Sewage Treatment Center and Shallow Water Bay. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17186483. [PMID: 32899918 PMCID: PMC7559856 DOI: 10.3390/ijerph17186483] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 08/24/2020] [Accepted: 08/31/2020] [Indexed: 11/16/2022]
Abstract
The incidence of enteric viruses in treated wastewater and their potential release into the environment or use for agriculture are very critical matters in public health. In our study, PCR (polymerase chain reaction) analysis of enteric viruses was performed on 59 samples of influents and effluents collected from Tubli wastewater treatment plant (Water Pollution Control Center (WPCC)) and Tubli Bay, where the effluents were discharged, in Kingdom of Bahrain during two sampling periods. Four clinically essential waterborne enteric viruses were examined: enterovirus (EV), hepatitis A virus (HAV), astroviruses (AV), and rotaviruses (RV) and compared to standard bacterial and bacteriophages indicators of fecal pollution. Detection rates of EV, AV, HAV, and RV in the influent samples were 100%, 75%, 12.5%, and 12.5%, respectively, while 50% of the effluent samples from Tubli WPCC contained only EV RNA. None of the tested enteric viruses could be detected in any of the samples collected directly from Tubli Bay. Effluent samples from Tubli plant did not show significant seasonal differences. Since detection of enteric viruses genome does not necessarily indicate infectivity, the infectivity of these viruses was evaluated through isolation and growth of indictor bacteria and bacteriophages. High concentration of fecal bacteriological indicators was detected in all effluents samples (100%): 3.20 × 103 cfu/mL for E. coli, 1.32 × 103 cfu/mL for Salmonella spp., and 1.92 × 103 cfu/mL for Shigella spp. E. coli and Salmonella specific bacteriophages were also detected in the effluent samples in high titers. The combined results of PCR and bacterial enumeration point to a probable public health risk via the use of these wastewaters in agriculture or their discharge into the sea. Continuous surveillance of viral and bacterial prevalence and their resistance to sewage disinfection procedures could contribute to a better control of risks associated with the recycling of effluent wastewater and its release into the environment.
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Affiliation(s)
- Essam M. Janahi
- Department of Biology, College of Science, University of Bahrain, Sakhir 32038, Bahrain; (S.M.); (S.F.D.P.); (H.A.N.)
- Correspondence:
| | - Sakina Mustafa
- Department of Biology, College of Science, University of Bahrain, Sakhir 32038, Bahrain; (S.M.); (S.F.D.P.); (H.A.N.)
| | - Saba F. D. Parkar
- Department of Biology, College of Science, University of Bahrain, Sakhir 32038, Bahrain; (S.M.); (S.F.D.P.); (H.A.N.)
| | - Humood A. Naser
- Department of Biology, College of Science, University of Bahrain, Sakhir 32038, Bahrain; (S.M.); (S.F.D.P.); (H.A.N.)
| | - Zaki M. Eisa
- The National Center for Disease Prevention and Control, Jazan 82722-2476, Saudi Arabia;
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10
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Teschovirus and other swine and human enteric viruses in Brazilian watersheds impacted by swine husbandry. Braz J Microbiol 2019; 51:711-717. [PMID: 31784949 DOI: 10.1007/s42770-019-00197-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 04/29/2019] [Indexed: 10/25/2022] Open
Abstract
Several emerging viral agents related to gastroenteritis are distributed in human and animal populations and may contaminate the environment due to anthropic activities. The objective of this study was to analyze the seasonal contamination by enteric virus and coliforms in water from streams in the Vale do Taquari, draining a large number of pig farms. Microbiological contamination was evidenced by the detection of total and thermotolerant coliforms, reaching their peak in December. Hepatitis E virus (HEV), Enterovirus-G (EV-G) genome, and Sapelovirus-A (SV-A) genome were not detected. On the other hand, Rotavirus (RV) was detected in 3% (1/32) of the samples, whereas Teschovirus-A (PTV) was detected in 6% (2/32). This is the first detection of PTV in environmental samples in Brazil, pointing that the virus is being shedded from swine herds to watersheds. Human mastadenovirus (HAdV) was the most frequent detected viral agent in 9.3% (3/32) with values of 2.54 × 105, 7.13 × 104, and 3.09 × 105 genome copies/liter (gc/L). The circulation of coliforms and viral pathogens is noticeable due to anthropic activities and to the management of animal waste from the pig farming. In this way, enteric viruses can assist in monitoring the quality of watersheds and in tracking sources of contamination.
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11
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The Detection and Characterization of Herpes Simplex Virus Type 1 in Confirmed Measles Cases. Sci Rep 2019; 9:12785. [PMID: 31484944 PMCID: PMC6726758 DOI: 10.1038/s41598-019-48994-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 08/09/2019] [Indexed: 11/09/2022] Open
Abstract
Based on measles surveillance in Shanghai, People's Republic of China, from 2006 to 2015, we found that measles virus isolates from 40 throat swab samples exhibited atypical cytopathic effects in Vero/hSLAM cells, which was found to be a result of coinfection with measles virus (MeV) and human herpes simplex virus type 1 (HSV-1). Serological and molecular approaches were used to confirm and characterize the coinfections in these patients. Among the 40 measles cases, measles-specific IgM was detected in 37 cases, while measles-specific IgG was detected in 27 cases. HSV-1-specific IgM and IgG were detected in 7 and 34 cases, respectively, suggesting that most of the MeV infections were primary, but that HSV-1 infection was due to the reactivation of latent virus in most cases. The titers of HSV-1 IgG in patients with either measles or measles-HSV-1 coinfection were significantly higher than those in the healthy group (P = 0.0026 and P < 0.0001, respectively); however, there was no significant difference in the titers of HSV-1 IgG in the MeV and MeV-HSV-1 coinfection patients (P = 0.105). Nucleic acids from MeV and HSV-1 were detected in 40 and 39 throat swabs, respectively. Twenty five MeV RNA sequences were genotyped, and all represented genotype H1, which is the endemic genotype in China. Sequences from the glycoprotein G gene of HSV-1 were used to classify the isolates into two distinct phylogenetic groups: 34 belonged to group A and 3 belonged to group B.
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Célia da Silva Lanna M, Viancelli A, Michelon W, Castro Carvalho SV, de Almeida Dos Reis D, Fernandez de Salles LA, Sant'Anna IH, Resende LT, de Souza Ferreira C, Aparecido das Chagas I, Hernández M, Treichel H, Rodríguez-Lázaro D, Fongaro G. Household-based biodigesters promote reduction of enteric virus and bacteria in vulnerable and poverty rural area. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 252:8-13. [PMID: 31146241 DOI: 10.1016/j.envpol.2019.05.104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 05/20/2019] [Accepted: 05/20/2019] [Indexed: 05/03/2023]
Abstract
The present study evaluated the river water quality improvement by implementation of household-based biodigesters in vulnerability and poverty rural area, in Minas Gerais State-Brazil. For that, 78 household-based biodigesters were installed for domestic wastewater treatment. Wastewater was collected before and after treatment and the physicochemical parameters and pathogens removal (human adenovirus (HAdV), hepatitis A (HAV) virus, Salmonella sp. and Escherichia coli) were evaluated; Additionally, river water was sampled before and after the household-based biodigesters implementation, to verify the contamination reduction and the positive impact of domestic wastewater treatment on waterborne pathogen reduction, considering HAdV, HAV, Salmonella sp. and E. coli quantification. The applicability in real-scale of decentralized treatment systems using household-based biodigesters promoted reduction of 90, 99, 99.99 and 99.999% from HAV, Salmonella sp., E. coli and HAdV from domestic wastewater, respectively; The river water quality improvement before the wastewater treatment application was highlight in the present study, considering that the reduction of waterborne pathogens in this water in 90, 99.99 and 99.999% of E. coli, HAV and HAdV, respectively (Salmonella sp. was not detected in river water). In general, this is an important study for encouraging the decentralized sanitation in vulnerable and poverty area, as well in rural sites, considering the positive impact of this implementation on public health.
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Affiliation(s)
- Maria Célia da Silva Lanna
- Laboratory of Microbiology and Technological Bioprospection, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Aline Viancelli
- Universidade do Contestado - UNC, PMPECSA, Concórdia, SC, Brazil
| | - Wiliam Michelon
- Universidade do Contestado - UNC, PMPECSA, Concórdia, SC, Brazil
| | | | - Deyse de Almeida Dos Reis
- Laboratory of Microbiology and Technological Bioprospection, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | | | - Iago Hashimoto Sant'Anna
- Laboratory of Microbiology and Technological Bioprospection, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Letícia Teresinha Resende
- Laboratory of Microbiology and Technological Bioprospection, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Clovis de Souza Ferreira
- Laboratory of Microbiology and Technological Bioprospection, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Igor Aparecido das Chagas
- Laboratory of Microbiology and Technological Bioprospection, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Marta Hernández
- Laboratory of Molecular Biology and Microbiology, Instituto Tecnológico Agrario de Castilla y León, Valladolid, Spain; Department of Biotechnology and Food Science, University of Burgos, Burgos, Spain
| | - Helen Treichel
- Laboratory of Microbiology and Bioprocesses, Universidade Federal da Fronteira Sul (UFFS), Erechim, RS, Brazil
| | | | - Gislaine Fongaro
- Laboratory of Applied Virology, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil.
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Pereira JG, Soares VM, de Souza FG, Tadielo LE, Dos Santos EAR, Brum MCS, Henzel A, Duval EH, Spilki FR, da Silva WP. Hepatitis A Virus, Hepatitis E Virus, and Rotavirus in Foods of Animal Origin Traded at the Borders of Brazil, Argentina, and Uruguay. FOOD AND ENVIRONMENTAL VIROLOGY 2018; 10:365-372. [PMID: 30206760 DOI: 10.1007/s12560-018-9357-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 09/06/2018] [Indexed: 06/08/2023]
Abstract
The aim of this study was to investigate hepatitis A virus (HAV), hepatitis E (HEV), and rotavirus (RV) in fresh and processed meat traded on the border of Brazil with Argentina and Uruguay. In total, 159 samples of raw and processed foods of animal origin were collected in Paso de los Libres, Argentina (n = 53 raw meat, n = 24 processed meat) and Rivera, Uruguay (n = 55 raw meat, n = 18 processed meat), or were seized by the Brazilian International Agricultural Surveillance System-VIGIAGRO (Brazil-Argentina border) (n = 8 raw meat, n = 1 bush meat). All samples were tested for the presence of HAV, HEV, and RV genomes. HAV genes were detected in 18.23% of samples and RV genes in 23.89%. No HEV-positive samples were detected. HAV was also detected in two of the VIGIAGRO samples. Processed meats from Argentina and Uruguay had a higher rate of HAV and RV than raw meat (P > 0.05). The median HAV in the Argentinian and Uruguayan samples was 6.9 × 104 and 3.5 × 103 copies/g, respectively. The presence of RV viral genes in raw meats from Argentina was significant, and this was not observed in processed meats. The presence of HAV and RV genes in a significant portion of products from Argentina and Uruguay is a potential source of human infection. This also indicates precarious conditions of acquisition, processing, and manipulation, which could be improved by improved regulation of food across borders.
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Affiliation(s)
- Juliano Gonçalves Pereira
- Departamento de Higiene Veterinária e Saúde Pública, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista "Júlio de Mesquita Filho", Campus de Botucatu, Rua Prof. Walter Maurício Correa, SN, Botucatu, SP, CEP 18618681, Brazil.
- Universidade Federal de Pelotas, Campus Capão do Leão. Avenida Eliseu Maciel, SN, Capão do Leão, RS, CEP 96010900, Brazil.
| | - Vanessa Mendonça Soares
- Universidade Federal do Pampa, Campus Uruguaiana. BR 472, Km 585, Uruguaiana, RS, CEP 97501970, Brazil
| | - Fernanda Gil de Souza
- Laboratório de Microbiologia Molecular, Instituto de Ciências da Saúde, Universidade Feevale, Rodovia ERS-239, 2755, Novo Hamburgo, RS, CEP 93525075, Brazil
| | - Leonardo Ereno Tadielo
- Universidade Federal do Pampa, Campus Uruguaiana. BR 472, Km 585, Uruguaiana, RS, CEP 97501970, Brazil
| | | | - Mário Celso Sperotto Brum
- Universidade Federal do Pampa, Campus Uruguaiana. BR 472, Km 585, Uruguaiana, RS, CEP 97501970, Brazil
| | - Andreia Henzel
- Laboratório de Microbiologia Molecular, Instituto de Ciências da Saúde, Universidade Feevale, Rodovia ERS-239, 2755, Novo Hamburgo, RS, CEP 93525075, Brazil
| | - Eduarda Hallal Duval
- Universidade Federal de Pelotas, Campus Capão do Leão. Avenida Eliseu Maciel, SN, Capão do Leão, RS, CEP 96010900, Brazil
| | - Fernando Rosado Spilki
- Laboratório de Microbiologia Molecular, Instituto de Ciências da Saúde, Universidade Feevale, Rodovia ERS-239, 2755, Novo Hamburgo, RS, CEP 93525075, Brazil
| | - Wladimir Padilha da Silva
- Universidade Federal de Pelotas, Campus Capão do Leão. Avenida Eliseu Maciel, SN, Capão do Leão, RS, CEP 96010900, Brazil.
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Selvarajan S, Reju S, Pushpanathan P, Arumugam R, Padmanabhan R, Kothandaramanujam SM, Srikanth P, Kang G. Molecular characterisation and clinical correlates of rotavirus in children and adults in a tertiary care centre, Chennai, South India. Indian J Med Microbiol 2018; 35:221-227. [PMID: 28681810 DOI: 10.4103/ijmm.ijmm_16_51] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
AIMS This study was undertaken to determine the rate of detection of rotavirus causing diarrhoea among children and adults, identify the common genotypes circulating and determine clinical correlates. SETTINGS AND DESIGN This is a cross-sectional study in a tertiary care centre. MATERIALS AND METHODS Stool samples were collected from adults and children, transported on ice, aliquoted and stored at - 80°C. Rotavirus antigen detection enzyme-linked immunosorbent assay was performed on all samples. Representative samples were typed by conventional hemi-nested VP7 and VP4 reverse transcription-polymerase chain reaction. STATISTICAL ANALYSIS USED Test of proportion, Student's t-test and Chi-square test were used for statistical analysis. RESULTS A total of 444 stool samples were collected and tested over 14 months. Among these, 116 were paediatric with a rate of positivity of 36.21% and 328 were adults with rate of positivity of 20.73%. Among children under 5 years (n = 90), the rate of positivity was 41.11%. Vesikari scale was used for clinical assessment. The mean ± standard deviation Vesikari score in rotavirus-infected children and rotavirus-uninfected children was 11.2 ± 3.2 and 8.9 ± 3.6, respectively, and the difference was statistically significant. Nineteen samples were genotyped in children < 5 years, 94.7% were of G1P[8] and 5.3% were of G9P[4] genotype. Genotyping of 14 adult samples, G1P[8](85.7%) was found as the predominant genotype, two samples (14.3%) were partially typed (G9PUT and G12PUT). CONCLUSIONS The rate of positivity of rotavirus in children under 5 years was 41.11%. G1P[8] is the most common strain circulating across all age groups.
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Affiliation(s)
- Sribal Selvarajan
- Department of Microbiology, Sri Ramachandra Medical College and Research Institute, Sri Ramachandra University, Chennai, Tamil Nadu, India
| | - Sudhabharathi Reju
- Department of Microbiology, Sri Ramachandra Medical College and Research Institute, Sri Ramachandra University, Chennai, Tamil Nadu, India
| | - Premalatha Pushpanathan
- Department of Microbiology, Sri Ramachandra Medical College and Research Institute, Sri Ramachandra University, Chennai, Tamil Nadu, India
| | - Rajesh Arumugam
- Division of Gastrointestinal Sciences, The Wellcome Trust Research Laboratory, Christian Medical College, Vellore, Tamil Nadu, India
| | - Ramachandran Padmanabhan
- Department of Paediatrics, Sri Ramachandra Medical College and Research Institute, Sri Ramachandra University, Chennai, Tamil Nadu, India
| | - Sudhakar Muthiah Kothandaramanujam
- Department of General Medicine, Sri Ramachandra Medical College and Research Institute, Sri Ramachandra University, Chennai, Tamil Nadu, India
| | - Padma Srikanth
- Department of Microbiology, Sri Ramachandra Medical College and Research Institute, Sri Ramachandra University, Chennai, Tamil Nadu, India
| | - Gagandeep Kang
- Division of Gastrointestinal Sciences, The Wellcome Trust Research Laboratory, Christian Medical College, Vellore, Tamil Nadu, India
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Castells M, Schild C, Caffarena D, Bok M, Giannitti F, Armendano J, Riet-Correa F, Victoria M, Parreño V, Colina R. Prevalence and viability of group A rotavirus in dairy farm water sources. J Appl Microbiol 2018; 124:922-929. [PMID: 29316065 DOI: 10.1111/jam.13691] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 12/30/2017] [Accepted: 01/02/2018] [Indexed: 12/27/2022]
Abstract
AIM To analyse group A rotavirus (RVA) environmental contamination in waters used for calves' consumption and to assess viral viability in dairy farm water sources. METHODS AND RESULTS We analysed 202 samples of water used for calves' consumption and RVA was detected by RT-qPCR in 35·1% (95% CI: 28·9-42·0%). A marked pattern of seasonality was observed with higher frequency of detection in colder than warmer months (P = 0·002). There was no association between viral load and season or between the number of milking cows in the herd and the detection of RVA in the farm. The viability of the RVA particles detected was confirmed by isolation of RVA in cell culture from 5 of 10 water samples. Furthermore, an RVA waterborne outbreak of neonatal calf diarrhoea was described. CONCLUSIONS We demonstrate that RVA is frequent in dairy farm waters, and that the virus is infectious and capable of generating a diarrhoea outbreak. SIGNIFICANCE AND IMPACT OF THE STUDY Neonatal diarrhoea syndrome leads to economic losses to the livestock industry worldwide. To determine transmission routes is essential to take action in this regard and reduce the impact that this syndrome has for the livestock production. The results obtained in this work alert the dairy industry and highlight that mitigation strategies are crucial to improve the microbiological quality of this water.
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Affiliation(s)
- M Castells
- Laboratorio de Virología Molecular, CENUR Litoral Norte, Centro Universitario de Salto, Universidad de la República, Salto, Uruguay
| | - C Schild
- Plataforma de Investigación en Salud Animal, Instituto Nacional de Investigación Agropecuaria (INIA), La Estanzuela, Colonia, Uruguay
| | - D Caffarena
- Plataforma de Investigación en Salud Animal, Instituto Nacional de Investigación Agropecuaria (INIA), La Estanzuela, Colonia, Uruguay
| | - M Bok
- Sección de Virus Gastroentéricos, Instituto de Virología, CICV y A, INTA Castelar, Buenos Aires, Argentina
| | - F Giannitti
- Plataforma de Investigación en Salud Animal, Instituto Nacional de Investigación Agropecuaria (INIA), La Estanzuela, Colonia, Uruguay.,Veterinary Population Medicine Department, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, USA
| | - J Armendano
- Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Balcarce, Buenos Aires, Argentina
| | - F Riet-Correa
- Plataforma de Investigación en Salud Animal, Instituto Nacional de Investigación Agropecuaria (INIA), La Estanzuela, Colonia, Uruguay
| | - M Victoria
- Laboratorio de Virología Molecular, CENUR Litoral Norte, Centro Universitario de Salto, Universidad de la República, Salto, Uruguay
| | - V Parreño
- Sección de Virus Gastroentéricos, Instituto de Virología, CICV y A, INTA Castelar, Buenos Aires, Argentina
| | - R Colina
- Laboratorio de Virología Molecular, CENUR Litoral Norte, Centro Universitario de Salto, Universidad de la República, Salto, Uruguay
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Osuolale O, Okoh A. Incidence of human adenoviruses and Hepatitis A virus in the final effluent of selected wastewater treatment plants in Eastern Cape Province, South Africa. Virol J 2015; 12:98. [PMID: 26104284 PMCID: PMC4481066 DOI: 10.1186/s12985-015-0327-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 06/16/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Municipal effluent constitutes a large reservoir of human enteric viruses and bacteria. Contemporary monitoring practices rely on indicator bacteria, and do not test for viruses. Different viruses, including Norwalk-like viruses, Hepatitis A virus (HAV), adenoviruses, and rotaviruses, are important agents of illnesses in humans. The burden of disease caused by adenoviruses manifests as pneumonia, bronchiolitis, otitis media, conjunctivitis, and tonsillitis, whereas HAV infection can manifest as acute inflammatory diseases of the liver, fever, anorexia, malaise, nausea, and abdominal discomfort, followed by jaundice and dark urine. The public health implications of these viruses depend upon the physiological status of the wastewater microbial community. METHODS The occurrence of human adenovirus (HAdV) and HAV was determined in the final effluents of five wastewater treatment plants (WWTPs) in the Eastern Cape, South Africa, over 12 months (September 2012-August 2013). The viruses were detected with real-time PCR, and conventional PCR was used for serotyping. RESULTS Adenovirus was detected in effluent samples from all five WWTPs and in 64 % of the total samples, whereas HAV was not detected in any effluent sample. At WWPT-A, samples were collected from the final effluent tank (adenoviral concentrations ranged from 1.05 × 10(1) to 1.10 × 10(4) genome/L, with a 41.7 % detection rate) and the discharge point (adenoviral concentrations ranged between 1.2 × 10(1) and 2.8 × 10(4) genome/L, with a 54.5 % detection rate). At WWPT-B, HAdV was detected in 91.7 % of samples, with viral concentrations of 7.92 × 10(1)-2.37 × 10(5) genome/L. The HAdV concentrations at WWPT-C were 5.32 × 10(1)-2.20 × 10(5) genome/L, and the detection rate was 75 %. The adenoviral concentrations at WWPT-D were 1.23 × 10(3)-1.05 × 10(4) genome/L, and the detection rate was 66.7 %. At WWPT-E, the viral concentrations were 1.08 × 10(1)-5.16 × 10(4) genome/L, and the detection rate was 54.5 %. Characterization of the adenoviruses revealed HAdV serotypes 2 (1.4 %) and 41 (7.1 %), in species C and F, respectively. CONCLUSIONS This study is the first to report the prevalence of HAdV in the final effluents of WWTPs in the Eastern Cape, South Africa. The adenoviral detection rates indicate the potential contamination of the environment, with adverse effects on public health.
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Affiliation(s)
- Olayinka Osuolale
- SA-MRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa. .,Applied and Environmental Microbiology Research Group, Department of Biochemistry and Microbiology, University of Fort Hare, Alice, 5700, South Africa.
| | - Anthony Okoh
- SA-MRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa.,Applied and Environmental Microbiology Research Group, Department of Biochemistry and Microbiology, University of Fort Hare, Alice, 5700, South Africa
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Bezerra AVA, Dos Reis EM, Rodrigues RO, Cenci A, Cerva C, Mayer FQ. Detection of Mycobacterium tuberculosis and Mycobacterium avium Complexes by Real-Time PCR in Bovine Milk from Brazilian Dairy Farms. J Food Prot 2015; 78:1037-42. [PMID: 25951404 DOI: 10.4315/0362-028x.jfp-14-365] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Foodborne diseases are a public health problem worldwide. The consumption of contaminated raw milk has been recognized as a major cause of transmission of bovine tuberculosis to humans. Other mycobacteria that may be present in raw milk and may cause diseases are those belonging to the Mycobacterium avium complex. In this study, molecular biology tools were applied to investigate raw milk contamination with Mycobacterium spp. in family dairy farms from Rio Grande do Sul, southern Brazil. Furthermore, different variables related to the source of the milk, herd characteristics, and management were evaluated for their effect on milk contamination. Five hundred and two samples were analyzed, of which 354 were from the Northwest region (102 farms with samples from 93 bulk tanks and 261 animals) and 148 from the South region of the state (22 farms with samples from 23 bulk tanks and 125 animals). Among them, 10 (1.99%) and 7 (1.39%) were positive for Mycobacterium tuberculosis (9 confirmed as Mycobacterium bovis) and M. avium complexes, respectively. There was no difference in the frequencies of positive samples between the regions or the sample sources. Of the positive samples, 4 were collected from a bulk tank (1 positive for M. avium and 3 for M. tuberculosis). Moreover, 1 sample was positive concomitantly for M. tuberculosis and M. avium complexes. On risk analysis, no variable was associated with raw milk contamination by M. tuberculosis complex species. However, washing the udders of all animals and drying them with paper towels were weakly classified as risk factors for M. avium contamination. Positive samples were obtained from both animals and bulk tanks, which emphasizes the importance of tuberculosis control programs and provides evidence that milk monitoring can be used as a control practice. Moreover, the findings of this study reinforce the need for awareness of the problems of raw milk consumption among the general population.
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Affiliation(s)
- André Vinícius Andrade Bezerra
- Laboratório de Biologia Molecular, Instituto de Pesquisas Veterinárias Desidério Finamor, Fundação Estadual de Pesquisa Agropecuária, Eldorado do Sul, Rio Grande do Sul, RS 92990-000, Brazil
| | - Emily Marques Dos Reis
- Laboratório de Biologia Molecular, Instituto de Pesquisas Veterinárias Desidério Finamor, Fundação Estadual de Pesquisa Agropecuária, Eldorado do Sul, Rio Grande do Sul, RS 92990-000, Brazil
| | - Rogério Oliveira Rodrigues
- Laboratório de Leptospirose, Instituto de Pesquisas Veterinárias Desidério Finamor, Fundação Estadual de Pesquisa Agropecuária, Eldorado do Sul, Rio Grande do Sul, RS 92990-000, Brazil
| | - Alexander Cenci
- Laboratório de Virologia, Instituto de Pesquisas Veterinárias Desidério Finamor, Fundação Estadual de Pesquisa Agropecuária, Eldorado do Sul, Rio Grande do Sul, RS 92990-000, Brazil
| | - Cristine Cerva
- Laboratório de Biologia Molecular, Instituto de Pesquisas Veterinárias Desidério Finamor, Fundação Estadual de Pesquisa Agropecuária, Eldorado do Sul, Rio Grande do Sul, RS 92990-000, Brazil
| | - Fabiana Quoos Mayer
- Laboratório de Biologia Molecular, Instituto de Pesquisas Veterinárias Desidério Finamor, Fundação Estadual de Pesquisa Agropecuária, Eldorado do Sul, Rio Grande do Sul, RS 92990-000, Brazil.
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