1
|
Denpetkul T, Pumkaew M, Sittipunsakda O, Srathongneam T, Mongkolsuk S, Sirikanchana K. Risk-based critical concentrations of enteric pathogens for recreational water criteria and recommended minimum sample volumes for routine water monitoring. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 950:175234. [PMID: 39102962 DOI: 10.1016/j.scitotenv.2024.175234] [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: 05/15/2024] [Revised: 07/30/2024] [Accepted: 08/01/2024] [Indexed: 08/07/2024]
Abstract
Concerns are rising about the contamination of recreational waters from human and animal waste, along with associated risks to public health. However, existing guidelines for managing pathogens in these environments have not yet fully integrated risk-based pathogen-specific criteria, which, along with recent advancements in indicators and markers, are essential to improve the protection of public health. This study aimed to establish risk-based critical concentration benchmarks for significant enteric pathogens, i.e., norovirus, rotavirus, adenovirus, Cryptosporidium spp., Giardia lamblia, Campylobacter jejuni, Salmonella spp., and Escherichia coli O157:H7. Applying a 0.036 risk benchmark to both marine and freshwater environments, the study identified the lowest critical concentrations for children, who are the most susceptible group. Norovirus, C. jejuni, and Cryptosporidium presented lowest median critical concentrations for virus, bacteria, and protozoa, respectively: 0.74 GC, 1.73 CFU, and 0.39 viable oocysts per 100 mL in freshwater for children. These values were then used to determine minimum sample volumes corresponding to different recovery rates for culture method, digital polymerase chain reaction and quantitative PCR methods. The results indicate that for children, norovirus required the largest sample volumes of freshwater and marine water (52.08 to 178.57 L, based on the 5th percentile with a 10 % recovery rate), reflecting its low critical concentration and high potential for causing illness. In contrast, adenovirus and rotavirus required significantly smaller volumes (approximately 0.24 to 1.33 L). C. jejuni and Cryptosporidium, which required the highest sampling volumes for bacteria and protozoa, needed 1.72 to 11.09 L and 4.17 to 25.51 L, respectively. Additionally, the presented risk-based framework could provide a model for establishing pathogen thresholds, potentially guiding the creation of extensive risk-based criteria for various pathogens in recreational waters, thus aiding public health authorities in decision-making, strengthening pathogen monitoring, and improving water quality testing accuracy for enhanced health protection.
Collapse
Affiliation(s)
- Thammanitchpol Denpetkul
- Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Monchai Pumkaew
- Environmental Engineering and Disaster Management Program, School of Multidisciplinary, Mahidol University, Kanchanaburi Campus, Kanchanaburi 71150, Thailand
| | - Oranoot Sittipunsakda
- Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Thitima Srathongneam
- Research Laboratory of Biotechnology, Chulabhorn Research Institute, Bangkok 10210, Thailand
| | - Skorn Mongkolsuk
- Research Laboratory of Biotechnology, Chulabhorn Research Institute, Bangkok 10210, Thailand; Center of Excellence on Environmental Health and Toxicology (EHT), OPS, MHESI, Bangkok 10400, Thailand
| | - Kwanrawee Sirikanchana
- Research Laboratory of Biotechnology, Chulabhorn Research Institute, Bangkok 10210, Thailand; Center of Excellence on Environmental Health and Toxicology (EHT), OPS, MHESI, Bangkok 10400, Thailand.
| |
Collapse
|
2
|
Skiendzielewski K, Burch T, Stokdyk J, McGinnis S, McLoughlin S, Firnstahl A, Spencer S, Borchardt M, Murphy HM. Two risk assessments: Evaluating the use of indicator HF183 Bacteroides versus pathogen measurements for modelling recreational illness risks in an urban watershed. WATER RESEARCH 2024; 259:121852. [PMID: 38889662 DOI: 10.1016/j.watres.2024.121852] [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: 11/22/2023] [Revised: 05/27/2024] [Accepted: 05/28/2024] [Indexed: 06/20/2024]
Abstract
The purpose of this study was to evaluate the performance of HF183 Bacteroides for estimating pathogen exposures during recreational water activities. We compared the use of Bacteroides-based exposure assessment to exposure assessment that relied on pathogen measurements. We considered two types of recreational water sites: those impacted by combined sewer overflows (CSOs) and those not impacted by CSOs. Samples from CSO-impacted and non-CSO-impacted urban creeks were analysed by quantitative polymerase chain reaction (qPCR) for HF183 Bacteroides and eight human gastrointestinal pathogens. Exposure assessment was conducted two ways for each type of site (CSO-impacted vs. non-CSO impacted): 1) by estimating pathogen concentrations from HF183 Bacteroides concentrations using published ratios of HF183 to pathogens in sewage and 2) by estimating pathogen concentrations from qPCR measurements. QMRA (quantitative microbial risk assessment) was then conducted for swimming, wading, and fishing exposures. Overall, mean risk estimates varied from 0.27 to 53 illnesses per 1,000 recreators depending on exposure assessment, site, activity, and norovirus dose-response model. HF183-based exposure assessment identified CSO-impacted sites as higher risk, and the recommended HF183 risk-based threshold of 525 genomic copies per 100 mL was generally protective of public health at the CSO-impacted sites but was not as protective at the non-CSO-impacted sites. In the context of our urban watershed, HF183-based exposure assessment over- and under-estimated risk relative to exposure assessment based on pathogen measurements, and the etiology of predicted pathogen-specific illnesses differed significantly. Across all sites, the HF183 model overestimated risk for norovirus, adenovirus, and Campylobacter jejuni, and it underestimated risk for E. coli and Cryptosporidium. To our knowledge, this study is the first to directly compare health risk estimates using HF183 and empirical pathogen measurements from the same waterways. Our work highlights the importance of site-specific hazard identification and exposure assessment to decide whether HF183 is applicable for monitoring risk.
Collapse
Affiliation(s)
- K Skiendzielewski
- Water, Health and Applied Microbiology Lab (WHAM Lab), Department of Epidemiology and Biostatistics, Temple University College of Public Health, Philadelphia, PA, United States.
| | - T Burch
- US Department of Agriculture-Agricultural Research Service, Environmentally Integrated Dairy Management Research Unit, Marshfield, WI, United States
| | - J Stokdyk
- US Geological Survey Upper Midwest Water Science Center, Marshfield, WI, United States
| | - S McGinnis
- Water, Health and Applied Microbiology Lab (WHAM Lab), Department of Epidemiology and Biostatistics, Temple University College of Public Health, Philadelphia, PA, United States
| | - S McLoughlin
- Water, Health and Applied Microbiology Lab (WHAM Lab), Department of Epidemiology and Biostatistics, Temple University College of Public Health, Philadelphia, PA, United States
| | - A Firnstahl
- US Geological Survey Upper Midwest Water Science Center, Marshfield, WI, United States
| | - S Spencer
- US Department of Agriculture-Agricultural Research Service, Environmentally Integrated Dairy Management Research Unit, Marshfield, WI, United States
| | - M Borchardt
- US Department of Agriculture-Agricultural Research Service, Environmentally Integrated Dairy Management Research Unit, Marshfield, WI, United States
| | - H M Murphy
- Water, Health and Applied Microbiology Lab (WHAM Lab), Department of Epidemiology and Biostatistics, Temple University College of Public Health, Philadelphia, PA, United States; Water, Health and Applied Microbiology Lab (WHAM Lab), Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada.
| |
Collapse
|
3
|
Su Y, Gao R, Huang F, Liang B, Guo J, Fan L, Wang A, Gao SH. Occurrence, transmission and risks assessment of pathogens in aquatic environments accessible to humans. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120331. [PMID: 38368808 DOI: 10.1016/j.jenvman.2024.120331] [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: 11/06/2023] [Revised: 01/24/2024] [Accepted: 02/08/2024] [Indexed: 02/20/2024]
Abstract
Pathogens are ubiquitously detected in various natural and engineered water systems, posing potential threats to public health. However, it remains unclear which human-accessible waters are hotspots for pathogens, how pathogens transmit to these waters, and what level of health risk associated with pathogens in these environments. This review collaboratively focuses and summarizes the contamination levels of pathogens on the 5 water systems accessible to humans (natural water, drinking water, recreational water, wastewater, and reclaimed water). Then, we showcase the pathways, influencing factors and simulation models of pathogens transmission and survival. Further, we compare the health risk levels of various pathogens through Quantitative Microbial Risk Assessment (QMRA), and assess the limitations of water-associated QMRA application. Pathogen levels in wastewater are consistently higher than in other water systems, with no significant variation for Cryptosporidium spp. among five water systems. Hydraulic conditions primarily govern the transmission of pathogens into human-accessible waters, while environmental factors such as temperature impact pathogens survival. The median and mean values of computed public health risk levels posed by pathogens consistently surpass safety thresholds, particularly in the context of recreational waters. Despite the highest pathogens levels found in wastewater, the calculated health risk is significantly lower than in other water systems. Except pathogens concentration, variables like the exposure mode, extent, and frequency are also crucial factors influencing the public health risk in water systems. This review shares valuable insights to the more accurate assessment and comprehensive management of public health risk in human-accessible water environments.
Collapse
Affiliation(s)
- Yiyi Su
- State Key Laboratory of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, China
| | - Rui Gao
- State Key Laboratory of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, China
| | - Fang Huang
- State Key Laboratory of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, China
| | - Bin Liang
- State Key Laboratory of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, China
| | - Jianhua Guo
- Australian Centre for Water and Environmental Biotechnology (ACWEB, formerly AWMC), The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Lu Fan
- Department of Ocean Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
| | - Aijie Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, China
| | - Shu-Hong Gao
- State Key Laboratory of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, China.
| |
Collapse
|
4
|
Kennedy LC, Lowry SA, Boehm AB. Temperature and particles interact to affect human norovirus and MS2 persistence in surface water. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2024; 26:71-81. [PMID: 38078556 DOI: 10.1039/d3em00357d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
Modeling the fate and transport of viruses and their genetic material in surface water is necessary to assess risks associated with contaminated surface waters and to inform environmental surveillance efforts. Temperature has been identified as a key variable affecting virus persistence in surface waters, but the effects of the presence of biological and inert particles and of their interaction with temperature have not been well characterized. We assessed these effects on the persistence of human norovirus (HuNoV) genotype II.4 purified from stool and MS2 in surface water. Raw or filter-sterilized creek water microcosms were inoculated and incubated in the dark at 10 °C, 15 °C, and 20 °C. HuNoV (i.e., genome segments and intact capsids) and MS2 (i.e., infectious MS2, genome segments, and intact capsids) concentrations were followed over 36 days. The range in positive, significant first-order decay rate constants for HuNoV in this study was 0.14 to 0.69 day-1 compared with 0.026 to 0.71 day-1 for that of MS2. Decay rate constants for HuNoV genome segments and infectious MS2 were largest in creek water that included biological and inert particles and incubated at higher temperatures. In addition, for HuNoV and MS2 incubated in raw or filter-sterilized creek water at 15 °C, capsid damage was not identified as a dominant inactivation mechanism. Environmental processes and events that affect surface water biological and inert particles, temperature, or both could lead to variable virus decay rate constants. Incorporating the effects of particles, temperature, and their interaction could enhance models of virus fate and transport in surface water.
Collapse
Affiliation(s)
- Lauren C Kennedy
- Department of Civil and Environmental Engineering, Stanford University, Y2E2 Room 189, Stanford, CA 94305, USA.
| | - Sarah A Lowry
- Department of Civil and Environmental Engineering, Stanford University, Y2E2 Room 189, Stanford, CA 94305, USA.
| | - Alexandria B Boehm
- Department of Civil and Environmental Engineering, Stanford University, Y2E2 Room 189, Stanford, CA 94305, USA.
| |
Collapse
|
5
|
Mudau M, Ngobeni-Nyambi R, Momba MNB. The Fascinating Cross-Paths of Pathogenic Bacteria, Human and Animal Faecal Sources in Water-Stressed Communities of Vhembe District, South Africa. Pathogens 2023; 12:1085. [PMID: 37764893 PMCID: PMC10535812 DOI: 10.3390/pathogens12091085] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/16/2023] [Accepted: 08/24/2023] [Indexed: 09/29/2023] Open
Abstract
Access to clean and safe drinking water still remains a major challenge in the developing world, causing public health risks in terms of waterborne infections, especially in rural areas of sub-Saharan Africa. This study aimed to track and detect enteric pathogens (Salmonella enterica subsp. enterica serovar Typhimurium str. LT2, Shigella flexneri, and Campylobacter jejuni subsp. jejuni) in rural water sources. It also sought to establish a correlation between these pathogens and the sources of faecal pollution. Multiplex qPCR and specific primers and probes were used for detection and tracking. The study successfully correlated the occurrence of target pathogens with sources of human and animal faecal contamination using host-specific genetic markers (BacHum and HF183 for humans, BacCow for cows, Pig-2-Bac for pigs, Cytb for chickens, and BacCan for dogs). The study revealed that enteric pathogens were found in 47.69% and 32.80% of samples during the wet and dry seasons, respectively. These pathogens were associated with human or animal faecal contamination. Correlations between pathogens and contamination sources were significant (p ≤ 0.05), with varying strengths during the wet and dry seasons. The findings emphasize the importance of identifying faecal contamination sources to protect rural communities from waterborne infections.
Collapse
Affiliation(s)
- Mulalo Mudau
- Department of Environmental, Water and Earth Sciences, Tshwane University of Technology, Arcadia Campus, Private Bag X680, Pretoria 0001, South Africa
| | - Renay Ngobeni-Nyambi
- Department of Medicine, Division of Infectious Diseases, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA;
| | - Maggy Ndombo Benteke Momba
- Department of Environmental, Water and Earth Sciences, Tshwane University of Technology, Arcadia Campus, Private Bag X680, Pretoria 0001, South Africa
| |
Collapse
|
6
|
González-Fernández A, Symonds EM, Gallard-Gongora JF, Mull B, Lukasik JO, Rivera Navarro P, Badilla Aguilar A, Peraud J, Mora Alvarado D, Cantor A, Breitbart M, Cairns MR, Harwood VJ. Risk of Gastroenteritis from Swimming at a Wastewater-Impacted Tropical Beach Varies across Localized Scales. Appl Environ Microbiol 2023; 89:e0103322. [PMID: 36847564 PMCID: PMC10057883 DOI: 10.1128/aem.01033-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 01/21/2023] [Indexed: 03/01/2023] Open
Abstract
Population growth and changing climate are expected to increase human exposure to pathogens in tropical coastal waters. We examined microbiological water quality in three rivers within 2.3 km of each other that impact a Costa Rican beach and in the ocean outside their plumes during the rainy and dry seasons. We performed quantitative microbial risk assessment (QMRA) to predict the risk of gastroenteritis associated with swimming and the amount of pathogen reduction needed to achieve safe conditions. Recreational water quality criteria based on enterococci were exceeded in >90% of river samples but in only 13% of ocean samples. Multivariate analysis grouped microbial observations by subwatershed and season in river samples but only by subwatershed in the ocean. The modeled median risk from all pathogens in river samples was between 0.345 and 0.577, 10-fold above the U.S. Environmental Protection Agency (U.S. EPA) benchmark of 0.036 (36 illnesses/1,000 swimmers). Norovirus genogroup I (NoVGI) contributed most to risk, but adenoviruses raised risk above the threshold in the two most urban subwatersheds. The risk was greater in the dry compared to the rainy season, due largely to the greater frequency of NoVGI detection (100% versus 41%). Viral log10 reduction needed to ensure safe swimming conditions varied by subwatershed and season and was greatest in the dry season (3.8 to 4.1 dry; 2.7 to 3.2 rainy). QMRA that accounts for seasonal and local variability of water quality contributes to understanding the complex influences of hydrology, land use, and environment on human health risk in tropical coastal areas and can contribute to improved beach management. IMPORTANCE This holistic investigation of sanitary water quality at a Costa Rican beach assessed microbial source tracking (MST) marker genes, pathogens, and indicators of sewage. Such studies are still rare in tropical climates. Quantitative microbial risk assessment (QMRA) found that rivers impacting the beach consistently exceeded the U.S. EPA risk threshold for gastroenteritis of 36/1,000 swimmers. The study improves upon many QMRA studies by measuring specific pathogens, rather than relying on surrogates (indicator organisms or MST markers) or estimating pathogen concentrations from the literature. By analyzing microbial levels and estimating the risk of gastrointestinal illness in each river, we were able to discern differences in pathogen levels and human health risks even though all rivers were highly polluted by wastewater and were located less than 2.5 km from one another. This variability on a localized scale has not, to our knowledge, previously been demonstrated.
Collapse
Affiliation(s)
| | - Erin M. Symonds
- College of Marine Science, University of South Florida, Saint Petersburg, Florida, USA
- Department of Anthropology, Southern Methodist University, Dallas, Texas, USA
| | | | - Bonnie Mull
- BCS Laboratories, Inc., Gainesville, Florida, USA
| | | | - Pablo Rivera Navarro
- Laboratorio Nacional de Aguas, Instituto Costarricense de Acueductos y Alcantarillados, Tres Ríos, Cartago, Costa Rica
| | - Andrei Badilla Aguilar
- Laboratorio Nacional de Aguas, Instituto Costarricense de Acueductos y Alcantarillados, Tres Ríos, Cartago, Costa Rica
| | - Jayme Peraud
- Department of Integrative Biology, University of South Florida, Tampa, Florida, USA
| | - Darner Mora Alvarado
- Laboratorio Nacional de Aguas, Instituto Costarricense de Acueductos y Alcantarillados, Tres Ríos, Cartago, Costa Rica
| | - Allison Cantor
- Department of Anthropology, Southern Methodist University, Dallas, Texas, USA
| | - Mya Breitbart
- College of Marine Science, University of South Florida, Saint Petersburg, Florida, USA
| | - Maryann R. Cairns
- Department of Anthropology, Southern Methodist University, Dallas, Texas, USA
| | - Valerie J. Harwood
- Department of Integrative Biology, University of South Florida, Tampa, Florida, USA
| |
Collapse
|
7
|
Kennedy L, Costantini VP, Huynh KA, Loeb SK, Jennings WC, Lowry S, Mattioli MC, Vinjé J, Boehm AB. Persistence of Human Norovirus (GII) in Surface Water: Decay Rate Constants and Inactivation Mechanisms. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:3671-3679. [PMID: 36812385 PMCID: PMC9996820 DOI: 10.1021/acs.est.2c09637] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
Human norovirus (HuNoV) is an important cause of acute gastroenteritis and can be transmitted by water exposures, but its persistence in water is not well understood. Loss of HuNoV infectivity in surface water was compared with persistence of intact HuNoV capsids and genome segments. Surface water from a freshwater creek was filter-sterilized, inoculated with HuNoV (GII.4) purified from stool, and incubated at 15 or 20 °C. We measured HuNoV infectivity via the human intestinal enteroid system and HuNoV persistence via reverse transcription-quantitative polymerase chain reaction assays without (genome segment persistence) or with (intact viral capsid persistence) enzymatic pretreatment to digest naked RNA. For infectious HuNoV, results ranged from no significant decay to a decay rate constant ("k") of 2.2 day-1. In one creek water sample, genome damage was likely a dominant inactivation mechanism. In other samples from the same creek, loss of HuNoV infectivity could not be attributed to genome damage or capsid cleavage. The range in k and the difference in the inactivation mechanism observed in water from the same site could not be explained, but variable constituents in the environmental matrix could have contributed. Thus, a single k may be insufficient for modeling virus inactivation in surface waters.
Collapse
Affiliation(s)
- Lauren
C. Kennedy
- Department
of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | - Veronica P. Costantini
- Division
of Viral Diseases, Centers for Disease Control
and Prevention, Atlanta, Georgia 30329, United States
| | - Kimberly A. Huynh
- Division
of Viral Diseases, Centers for Disease Control
and Prevention, Atlanta, Georgia 30329, United States
| | - Stephanie K. Loeb
- Department
of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
- Department
of Civil Engineering, McGill University, 817 Rue Sherbrooke Ouest, Montreal, QB H3A
0C3, Canada
| | - Wiley C. Jennings
- Department
of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | - Sarah Lowry
- Department
of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | - Mia C. Mattioli
- Division
of Foodborne, Waterborne, and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia 30329, United States
| | - Jan Vinjé
- Division
of Viral Diseases, Centers for Disease Control
and Prevention, Atlanta, Georgia 30329, United States
| | - Alexandria B. Boehm
- Department
of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| |
Collapse
|
8
|
Gholipour S, Nikaeen M, Rabbani D, Mohammadi F, Manesh RM, Besharatipour N, Bina B. Occurrence of enteric and non-enteric microorganisms in coastal waters impacted by anthropogenic activities: A multi-route QMRA for swimmers. MARINE POLLUTION BULLETIN 2023; 188:114716. [PMID: 36860014 DOI: 10.1016/j.marpolbul.2023.114716] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 01/28/2023] [Accepted: 02/05/2023] [Indexed: 06/18/2023]
Abstract
The purpose of this study was to evaluate the microbial characteristics of coastal waters which are impacted by anthropogenic pollution as well as estimate the health risks associated with exposure to enteric and non-enteric microorganisms during swimming. Fecal indicator bacteria were highly detected in samples. Moreover, pathogenic and opportunistic microorganisms were found, with the highest frequency for Pseudomonas aeruginosa followed by Adenovirus 40/41, Acanthamoeba spp., Salmonella enterica, and Cryptosporidium parvum. The median risk of gastrointestinal illness through ingestion of water was estimated to be above the benchmark value of 0.05 per event recommended by WHO. Cryptosporidium followed by Adenovirus, showed higher illness risks than Salmonella. The potential risks of Acanthamoeba and P. aeruginosa were estimated to be low for both dermal and ocular exposure routes. However, there are uncertainties about the infectious fraction of pathogens existing in coastal waters and the delivered dose of microorganisms from dermal/ocular exposure during recreational activities.
Collapse
Affiliation(s)
- Sahar Gholipour
- Department of Environmental Health Engineering, Faculty of Health, Kashan University of Medical Sciences, Kashan, 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.
| | - Davarkhah Rabbani
- Department of Environmental Health Engineering, Faculty of Health, Kashan University of Medical Sciences, Kashan, Iran
| | - Farzaneh Mohammadi
- 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
| | - Reza Mohammadi Manesh
- Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Nayereh Besharatipour
- 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
| | - Bijan Bina
- 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
| |
Collapse
|
9
|
Li C, Sylvestre É, Fernandez-Cassi X, Julian TR, Kohn T. Waterborne virus transport and the associated risks in a large lake. WATER RESEARCH 2023; 229:119437. [PMID: 36476383 DOI: 10.1016/j.watres.2022.119437] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 11/04/2022] [Accepted: 11/26/2022] [Indexed: 06/17/2023]
Abstract
Waterborne enteric viruses in lakes, especially at recreational water sites, may have a negative impact on human health. However, their fate and transport in lakes are poorly understood. In this study, we propose a coupled water quality and quantitative microbial risk assessment (QMRA) model to study the transport, fate and infection risk of four common waterborne viruses (adenovirus, enterovirus, norovirus and rotavirus), using Lake Geneva as a study site. The measured virus load in raw sewage entering the lake was used as the source term in the water quality simulations for a hypothetical scenario of discharging raw wastewater at the lake surface. After discharge into the lake, virus inactivation was modeled as a function of water temperature and solar irradiance that varied both spatially and temporally during transport throughout the lake. Finally, the probability of infection, while swimming at a popular beach, was quantified and compared among the four viruses. Norovirus was found to be the most abundant virus that causes an infection probability that is at least 10 times greater than the other viruses studied. Furthermore, environmental inactivation was found to be an essential determinant in the infection risks posed by viruses to recreational water users. We determined that infection risks by enterovirus and rotavirus could be up to 1000 times lower when virus inactivation by environmental stressors was accounted for compared with the scenarios considering hydrodynamic transport only. Finally, the model highlighted the role of the wind field in conveying the contamination plume and hence in determining infection probability. Our simulations revealed that for beaches located west of the sewage discharge, the infection probability under eastward wind was 43% lower than that under westward wind conditions. This study highlights the potential of combining water quality simulation and virus-specific risk assessment for a safe water resources usage and management.
Collapse
Affiliation(s)
- Chaojie Li
- Laboratory of Environmental Chemistry, School of Architecture, Civil and Environmental Engineering, (ENAC), École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Émile Sylvestre
- Department Environmental Microbiology, Eawag-Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
| | - Xavier Fernandez-Cassi
- Laboratory of Environmental Chemistry, School of Architecture, Civil and Environmental Engineering, (ENAC), École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Timothy R Julian
- Department Environmental Microbiology, Eawag-Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland; Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland
| | - Tamar Kohn
- Laboratory of Environmental Chemistry, School of Architecture, Civil and Environmental Engineering, (ENAC), École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
| |
Collapse
|
10
|
Yu L, Shi Y, Xing Z, Yan G. Detection and correlation analysis of shellfish pathogens in Dadeng Island, Xiamen. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:12601-12613. [PMID: 34263403 DOI: 10.1007/s11356-021-15176-8] [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: 03/29/2021] [Accepted: 06/24/2021] [Indexed: 06/13/2023]
Abstract
Food poisoning is caused by pathogenic bacteria in water and aquatic products, especially bivalves (e.g., oysters, clams), which can bioaccumulate pathogenic bacteria. Polluted water and aquatic products thus pose a serious threat to human health and safety. In this study, the types of pathogenic bacteria in water samples and shellfish collected from the Dadeng offshore area in Xiamen were examined. We also analyzed the relationships between dominant pathogens and major climate and water quality parameters. Our objective was to provide reference data that may be used to help prevent bacterial infections and to improve aquatic food hygiene in Xiamen and its surrounding areas to safe levels, thus ensuring the health of Xiamen residents. We found that the main pathogenic bacteria were Vibrio and Bacillus, with the dominant pathogen being Vibrio parahaemolyticus. Physical and chemical indexes (water temperature, salinity, pH, dissolved oxygen, and turbidity) of water bodies and the 3-day accumulated rainfall were found to be important factors affecting the occurrence and abundance of V. parahaemolyticus.
Collapse
Affiliation(s)
- Lei Yu
- Marine Biology College, Xiamen Ocean Vocational College, Xiamen, 361012, China
| | - Yijia Shi
- Fisheries College, Jimei University, Xiamen, 361021, China
| | - Zhiyong Xing
- Marine Biology College, Xiamen Ocean Vocational College, Xiamen, 361012, China
| | - Guangyu Yan
- Marine Biology College, Xiamen Ocean Vocational College, Xiamen, 361012, China.
| |
Collapse
|
11
|
Goh SG, Liang L, Gin KYH. Assessment of Human Health Risks in Tropical Environmental Waters with Microbial Source Tracking Markers. WATER RESEARCH 2021; 207:117748. [PMID: 34837748 DOI: 10.1016/j.watres.2021.117748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 10/06/2021] [Accepted: 10/07/2021] [Indexed: 06/13/2023]
Abstract
Human specific microbial source tracking (MST) markers which are highly specific to human waste contamination offer the advantage of better association with human pathogens than traditional microbial indicators. However, the performance of these MST markers may vary across different geographical regions. The magnitude of MST markers also plays an important role in interpreting the health risks. This study aims to (i) validate the specificity and sensitivity of human markers for tropical urban catchments; (ii) identify the threshold concentrations of MST markers, i.e. human polyomaviruses (HPyVs), Bacteroides thetaiotaomicron (B. theta) and Methanobrevibacter smithii (M. smithii), that correspond to the acceptable gastrointestinal (GI) illness risks associated with swimming using the QMRA approach; and (iii) validate the threshold concentrations of MST markers using the surveillance data obtained from the tropical urban environment. Among the three MST markers, HPyVs showed the highest specificity (100%) to sewage samples, followed by M. smithii (97%) and B. theta (90%). All MST markers showed 100% sensitivity towards sewage contamination, with B. theta present in highest abundance in sewage, followed by HPyVs and M. smithii. This study demonstrates a risk-based framework to identify the threshold concentrations of MST markers associated with GI illness risks in environmental waters by considering two main influencing factors (i.e. decay and dilution factors). This study successfully validated the B. theta threshold concentration range (581 to 8073 GC/100 mL) with field data (370 to 6500 GC/100 mL) in estimating GI illness risks with an Enterococcus model. Field data showed that the MST markers at threshold concentrations were able to classify the safe level in more than 83% of the samples, according to GI illness risks from Enterococcus and adenovirus. The study also highlighted the lack of associations between MST markers and GI illness risks from norovirus. With comprehensive information on specificity, sensitivity and threshold concentrations of MST markers, increasing confidence can be placed on identifying human source contamination and evaluating the health risks posed in environmental waters in Singapore.
Collapse
Affiliation(s)
- S G Goh
- NUS Environmental Research Institute, National University of Singapore, T-Lab Building, #02-01, 5A Engineering Drive 1 117411, Singapore
| | - L Liang
- Department of Civil & Environmental Engineering, Faculty of Engineering, National University of Singapore, Block E1A, #07-03,1 Engineering Drive 2 117576, Singapore
| | - K Y H Gin
- NUS Environmental Research Institute, National University of Singapore, T-Lab Building, #02-01, 5A Engineering Drive 1 117411, Singapore; Department of Civil & Environmental Engineering, Faculty of Engineering, National University of Singapore, Block E1A, #07-03,1 Engineering Drive 2 117576, Singapore.
| |
Collapse
|
12
|
Shih YJ, Chen JS, Chen YJ, Yang PY, Kuo YJ, Chen TH, Hsu BM. Impact of heavy precipitation events on pathogen occurrence in estuarine areas of the Puzi River in Taiwan. PLoS One 2021; 16:e0256266. [PMID: 34398929 PMCID: PMC8366992 DOI: 10.1371/journal.pone.0256266] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 08/03/2021] [Indexed: 12/03/2022] Open
Abstract
Pathogen populations in estuarine areas are dynamic, as they are subject to multiple natural and anthropogenic challenges. Heavy rainfall events bring instability to the aquatic environment in estuaries, causing changes in pathogen populations and increased environmental sanitation and public health concerns. In this study, we investigated the effects of heavy precipitation on the occurrence of pathogens in the Puzi River estuary, which is adjacent to the largest inshore oyster farming area in Taiwan. Our results indicated that Vibrio parahaemolyticus and adenovirus were the most frequently detected pathogens in the area. There was a significant difference (Mann-Whitney U test, p < 0.01) in water quality parameters, including total coliform, Escherichia coli, water temperature, turbidity, salinity, and dissolved oxygen, between groups with and without V. parahaemolyticus. In addition, the detection rate was negatively correlated with the average daily rainfall (r2 > 0.8). There was no significant difference between water quality parameters and the presence/absence of adenovirus, but a positive correlation was observed between the average daily rainfall and the detection rate of adenovirus (r2 ≥ 0.75). We conclude that heavy precipitation changes estuarine water quality, causing variations in microbial composition, including pathogens. As extreme weather events become more frequent due to climate change, the potential impacts of severe weather events on estuarine environments require further investigation.
Collapse
Affiliation(s)
- Yi-Jia Shih
- Fujian Provincial Key Laboratory of Marine Fishery Resources and Eco-environment, Fisheries College, Jimei University, Xiamen, China
- Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi, Taiwan
| | - Jung-Sheng Chen
- Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi, Taiwan
- Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan
| | - Yi-Jen Chen
- Department of Chest Division, Internal Medicine, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi, Taiwan
| | - Pei-Yu Yang
- Department of Laboratory, Show Chwan Memorial Hospital, Changhua, Taiwan
- Department of Kinesiology, Health and Leisure, Chienkuo Technology University, Changhua City, Taiwan
| | - Yi-Jie Kuo
- Department of Orthopedic Surgery, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Tsung-Hsien Chen
- Department of Internal Medicine, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi, Taiwan
| | - Bing-Mu Hsu
- Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi, Taiwan
- Center for Innovative on Aging Society (CIRAS), National Chung Cheng University, Chiayi, Taiwan
| |
Collapse
|
13
|
Loeb SK, Jennings WC, Wigginton KR, Boehm AB. Sunlight Inactivation of Human Norovirus and Bacteriophage MS2 Using a Genome-Wide PCR-Based Approach and Enzyme Pretreatment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:8783-8792. [PMID: 34101449 DOI: 10.1021/acs.est.1c01575] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Human norovirus (hNoV) is an important etiology of gastrointestinal illness and can be transmitted via ingestion of contaminated water. Currently impractical to culture, hNoV detection is reliant on real-time polymerase chain reaction (RT-PCR)-based methods. This approach cannot distinguish between infective and inactivated viruses because intact regions of the RNA genome can amplify even if the damage is present in other regions of the genome or because intact genetic material is not contained within an infectious virion. Herein, we employ a multiple long-amplicon RT-qPCR extrapolation approach to assay genome-wide damage and an enzymatic pretreatment to study the impact of simulated sunlight on the infectivity of hNoV in clear, sensitizer-free water. Using MS2 coliphage as an internal control, the genome-wide damage extrapolation approach, previously successfully applied for UV-254 inactivation, vastly overestimated sunlight inactivation, suggesting key differences in photoinactivation under different spectral conditions. hNoV genomic RNA was more susceptible to simulated sunlight degradation per base compared to MS2 genomic RNA, while enzymatic pretreatment indicated that hNoV experienced more capsid damage than MS2. This work provides practical and mechanistic insight into the endogenous sunlight inactivation of single-stranded RNA bacteriophage MS2, a widely used surrogate, and hNoV GII.4 Sydney, an important health-relevant virus, in clear sensitizer-free water.
Collapse
Affiliation(s)
- Stephanie K Loeb
- Department of Civil & Environmental Engineering, Stanford University, Stanford, California 94305, United States
- Engineering Research Center (ERC) for Re-inventing the Nation's Urban Water Infrastructure (ReNUWIt), Stanford, California 94305, United States
| | - Wiley C Jennings
- Department of Civil & Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | - Krista Rule Wigginton
- Department of Civil & Environmental Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Alexandria B Boehm
- Department of Civil & Environmental Engineering, Stanford University, Stanford, California 94305, United States
- Engineering Research Center (ERC) for Re-inventing the Nation's Urban Water Infrastructure (ReNUWIt), Stanford, California 94305, United States
| |
Collapse
|
14
|
Scalize PS, Gabriel EFM, Lima FS, Arruda PN, Lopes HTL, Paula Reis Y, Carneiro LC, Bezerra NR, Fiaccadori FS, Baumann LRF. Physicochemical, microbiological quality, and risk assessment of water consumed by a quilombola community in midwestern Brazil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:35941-35957. [PMID: 33682056 DOI: 10.1007/s11356-021-13146-8] [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: 09/15/2020] [Accepted: 02/22/2021] [Indexed: 06/12/2023]
Abstract
The quality of the water consumed by a given community is related to its quality of life. In this sense, this study aimed to evaluate, from the perspective of health risk, the physical, chemical, and microbiological quality of drinking water, in a quilombola community, and the qualitative aspects intrinsic to its use and storage. For this, water samples, collected at the exits of the collective water supply system and from eight cisterns that store rainwater, used for human consumption, were analyzed. The samples were subjected to physical, chemical, and microbiological analysis, including adenovirus (HAdV) and enterovirus (EV). The probability of an individual acquiring infection through water consumption was determined by quantitative microbiological risk analysis using HAdV and Escherichia coli (EC) as reference pathogens. The results showed that the water in the deep tubular well had 270.8 mg/L of total hardness, leading to the rejection of its consumption by ingestion. Alternativity, the people in the community consume rainwater stored in cisterns. For this type of water, the presence of heterotrophic bacteria was found in 75%, total coliform was present in 100%, and Enterococci were detected in 25%. Furthermore, EC was present in 25%, EV in 50%, and HAdV in 100% of the samples. The probability of annual infection with HAdV and EC was, in the worst situation, 100% and 1.3%, respectively. Regarding the qualitative and quantitative aspects, there was a significant positive correlation between the absence of EC and the withdrawal of water from the cistern using a pump and the opposite when the withdrawal was carried out using a bucket or hose. Based on the results found, it is important to carry out actions aimed at improving water quality and, consequently, the quality of life of people living in the study community.
Collapse
Affiliation(s)
- Paulo Sérgio Scalize
- Escola de Engenharia Civil e Ambiental, Universidade Federal de Goiás, Goiânia, GO, 74605-220, Brazil
| | | | - Fernando Santos Lima
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brazil
| | - Poliana Nascimento Arruda
- Escola de Engenharia Civil e Ambiental, Universidade Federal de Goiás, Goiânia, GO, 74605-220, Brazil
| | - Hítalo Tobias Lôbo Lopes
- Escola de Engenharia Civil e Ambiental, Universidade Federal de Goiás, Goiânia, GO, 74605-220, Brazil
| | - Ysabella Paula Reis
- Instituto Federal de Educação, Ciência e Tecnologia de Goiás - Campus Goiânia, Goiânia, GO, 74055-110, Brazil
| | - Lilian Carla Carneiro
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brazil
| | - Nolan Ribeiro Bezerra
- Instituto Federal de Educação, Ciência e Tecnologia de Goiás - Campus Goiânia, Goiânia, GO, 74055-110, Brazil
| | - Fabíola Souza Fiaccadori
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brazil
| | | |
Collapse
|
15
|
Farkas K, Green E, Rigby D, Cross P, Tyrrel S, Malham SK, Jones DL. Investigating awareness, fear and control associated with norovirus and other pathogens and pollutants using best-worst scaling. Sci Rep 2021; 11:11194. [PMID: 34045602 PMCID: PMC8160009 DOI: 10.1038/s41598-021-90704-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 05/10/2021] [Indexed: 02/04/2023] Open
Abstract
Pollutants found in the water and air environment represent an ever-growing threat to human health. Contact with some air-, water- and foodborne pathogens (e.g. norovirus) results in gastrointestinal diseases and outbreaks. For future risk mitigation, we aimed to measure people's awareness of waterborne and foodborne norovirus relative to other environment-associated pollutants (e.g. pesticides, bioaerosols, antibiotic resistant bacteria) and well-known risks (e.g. diabetes, dementia, terrorist attack). We used an online survey, which included a best-worst scaling component to elicit personal levels of control and fear prompted by norovirus relative to 15 other risks. There was a negative correlation between levels of fear vs. control for all 16 measured risks. Perceived infection control levels were higher amongst women compared to men and correlated with age and the level of qualification in both groups. Participants who had sought advice regarding the symptoms caused by norovirus appeared to have more control over the risks. Norovirus is associated with high levels of fear, however, the levels of control over it is low compared to other foodborne illnesses, e.g. Salmonella. Addressing this deficit in the public's understanding of how to control exposure to the pathogen in an important health need.
Collapse
Affiliation(s)
- Kata Farkas
- grid.7362.00000000118820937School of Natural Sciences, Bangor University, Deiniol Road, Bangor, Gwynedd, LL57 2UW UK ,grid.7362.00000000118820937School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL53 5AB UK ,Marine Centre Wales, Menai Bridge, Anglesey, LL59 5AB UK
| | - Emma Green
- grid.7362.00000000118820937School of Natural Sciences, Bangor University, Deiniol Road, Bangor, Gwynedd, LL57 2UW UK
| | - Dan Rigby
- grid.5379.80000000121662407Department of Economics, University of Manchester, Oxford Road, Manchester, M13 9PL UK
| | - Paul Cross
- grid.7362.00000000118820937School of Natural Sciences, Bangor University, Deiniol Road, Bangor, Gwynedd, LL57 2UW UK
| | - Sean Tyrrel
- grid.12026.370000 0001 0679 2190School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL UK
| | - Shelagh K. Malham
- grid.7362.00000000118820937School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL53 5AB UK
| | - David L. Jones
- grid.7362.00000000118820937School of Natural Sciences, Bangor University, Deiniol Road, Bangor, Gwynedd, LL57 2UW UK ,grid.1012.20000 0004 1936 7910UWA Oceans Institute, The University of Western Australia, Perth, WA 6009 Australia
| |
Collapse
|
16
|
Graham KE, Loeb SK, Wolfe MK, Catoe D, Sinnott-Armstrong N, Kim S, Yamahara KM, Sassoubre LM, Mendoza Grijalva LM, Roldan-Hernandez L, Langenfeld K, Wigginton KR, Boehm AB. SARS-CoV-2 RNA in Wastewater Settled Solids Is Associated with COVID-19 Cases in a Large Urban Sewershed. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:488-498. [PMID: 33283515 PMCID: PMC7737534 DOI: 10.1021/acs.est.0c06191] [Citation(s) in RCA: 229] [Impact Index Per Article: 76.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 11/16/2020] [Accepted: 11/18/2020] [Indexed: 05/11/2023]
Abstract
Wastewater-based epidemiology may be useful for informing public health response to viral diseases like COVID-19 caused by SARS-CoV-2. We quantified SARS-CoV-2 RNA in wastewater influent and primary settled solids in two wastewater treatment plants to inform the preanalytical and analytical approaches and to assess whether influent or solids harbored more viral targets. The primary settled solids samples resulted in higher SARS-CoV-2 detection frequencies than the corresponding influent samples. Likewise, SARS-CoV-2 RNA was more readily detected in solids using one-step digital droplet (dd)RT-PCR than with two-step RT-QPCR and two-step ddRT-PCR, likely owing to reduced inhibition with the one-step ddRT-PCR assay. We subsequently analyzed a longitudinal time series of 89 settled solids samples from a single plant for SARS-CoV-2 RNA as well as coronavirus recovery (bovine coronavirus) and fecal strength (pepper mild mottle virus) controls. SARS-CoV-2 RNA targets N1 and N2 concentrations correlated positively and significantly with COVID-19 clinically confirmed case counts in the sewershed. Together, the results demonstrate that measuring SARS-CoV-2 RNA concentrations in settled solids may be a more sensitive approach than measuring SARS-CoV-2 in influent.
Collapse
Affiliation(s)
- Katherine E. Graham
- Department of Civil and Environmental Engineering,
Stanford University, 473 Via Ortega, Stanford 94305,
California, United States
| | - Stephanie K. Loeb
- Department of Civil and Environmental Engineering,
Stanford University, 473 Via Ortega, Stanford 94305,
California, United States
| | - Marlene K. Wolfe
- Department of Civil and Environmental Engineering,
Stanford University, 473 Via Ortega, Stanford 94305,
California, United States
| | - David Catoe
- Joint Initiative for Metrology in Biology,
SLAC National Accelerator Laboratory, Stanford 94305,
California, United States
| | - Nasa Sinnott-Armstrong
- Department of Genetics, Stanford University
School of Medicine, Stanford 94305, California, United
States
- Emmett Interdisciplinary Program in Environment and
Resources, Stanford University, Stanford 94305, California,
United States
| | - Sooyeol Kim
- Department of Civil and Environmental Engineering,
Stanford University, 473 Via Ortega, Stanford 94305,
California, United States
| | - Kevan M. Yamahara
- Monterey Bay Aquarium Research
Institute, Moss Landing 95039, California, United
States
| | - Lauren M. Sassoubre
- Department of Engineering, University of San
Francisco, San Francisco 94117, California, United
States
| | - Lorelay M. Mendoza Grijalva
- Department of Civil and Environmental Engineering,
Stanford University, 473 Via Ortega, Stanford 94305,
California, United States
| | - Laura Roldan-Hernandez
- Department of Civil and Environmental Engineering,
Stanford University, 473 Via Ortega, Stanford 94305,
California, United States
| | - Kathryn Langenfeld
- Department of Civil and Environmental Engineering,
University of Michigan, Ann Arbor 48109, Michigan,
United States
| | - Krista R. Wigginton
- Department of Civil and Environmental Engineering,
University of Michigan, Ann Arbor 48109, Michigan,
United States
| | - Alexandria B. Boehm
- Department of Civil and Environmental Engineering,
Stanford University, 473 Via Ortega, Stanford 94305,
California, United States
| |
Collapse
|
17
|
González-Fernández A, Symonds EM, Gallard-Gongora JF, Mull B, Lukasik JO, Rivera Navarro P, Badilla Aguilar A, Peraud J, Brown ML, Mora Alvarado D, Breitbart M, Cairns MR, Harwood VJ. Relationships among microbial indicators of fecal pollution, microbial source tracking markers, and pathogens in Costa Rican coastal waters. WATER RESEARCH 2021; 188:116507. [PMID: 33126000 DOI: 10.1016/j.watres.2020.116507] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 10/06/2020] [Accepted: 10/08/2020] [Indexed: 06/11/2023]
Abstract
Tropical coastal waters are understudied, despite their ecological and economic importance. They also reflect projected climate change scenarios for other climate zones, e.g., increased rainfall and water temperatures. We conducted an exploratory microbial water quality study at a tropical beach influenced by sewage-contaminated rivers, and tested the hypothesis that fecal microorganisms (fecal coliforms, enterococci, Clostridium perfringens, somatic and male-specific coliphages, pepper mild mottle virus (PMMoV), Bacteroides HF183, norovirus genogroup I (NoVGI), Salmonella, Cryptosporidium and Giardia) would vary by season and tidal stage. Most microorganisms' concentrations were greater in the rainy season; however, NoVGI was only detected in the dry season and Cryptosporidium was the only pathogen most frequently detected in rainy season. Fecal indicator bacteria (FIB) levels exceeded recreational water quality criteria standards in >85% of river samples and in <50% of ocean samples, regardless of the FIB or regulatory criterion. Chronic sewage contamination was demonstrated by detection of HF183 and PMMoV in 100% of river samples, and in >89% of ocean samples. Giardia, Cryptosporidium, Salmonella, and NoVGI were frequently detected in rivers (39%, 39%, 26%, and 39% of samples, respectively), but infrequently in ocean water, particularly during the dry season. Multivariate analysis showed that C. perfringens, somatic coliphage, male-specific coliphage, and PMMoV were the subset of indicators that maximized the correlation with pathogens in the rivers. In the ocean, the best subset of indicators was enterococci, male-specific coliphage, and PMMoV. We also executed redudancy analyses on environmental parameters and microorganim concentrations, and found that rainfall best predicted microbial concentrations. The seasonal interplay of rainfall and pathogen prevalence undoubtedly influences beach users' health risks. Relationships are likely to be complex, with some risk factors increasing and others decreasing each season. Future use of multivariate approaches to better understand linkages among environmental conditions, microbial predictors (fecal indicators and MST markers), and pathogens will improve prediction of high-risk scenarios at recreational beaches.
Collapse
Affiliation(s)
| | - Erin M Symonds
- College of Marine Science, University of South Florida, Saint Petersburg, FL 33701, USA
| | | | - Bonnie Mull
- Biological Consulting Services of North Central Floida, Inc., Gainesville, FL 32609, USA
| | - Jerzy O Lukasik
- Biological Consulting Services of North Central Floida, Inc., Gainesville, FL 32609, USA
| | - Pablo Rivera Navarro
- Laboratorio Nacional de Aguas, Instituto Costarricense de Acueductos y Alcantarillados, Tres Ríos, Cartago, Costa Rica
| | - Andrei Badilla Aguilar
- Laboratorio Nacional de Aguas, Instituto Costarricense de Acueductos y Alcantarillados, Tres Ríos, Cartago, Costa Rica
| | - Jayme Peraud
- Department of Integrative Biology, University of South Florida, Tampa, FL 33620, USA
| | - Megan L Brown
- Department of Anthropology, Southern Methodist University, Dallas, TX 75205, USA
| | - Darner Mora Alvarado
- Laboratorio Nacional de Aguas, Instituto Costarricense de Acueductos y Alcantarillados, Tres Ríos, Cartago, Costa Rica
| | - Mya Breitbart
- College of Marine Science, University of South Florida, Saint Petersburg, FL 33701, USA
| | - Maryann R Cairns
- Department of Anthropology, Southern Methodist University, Dallas, TX 75205, USA
| | - Valerie J Harwood
- Department of Integrative Biology, University of South Florida, Tampa, FL 33620, USA.
| |
Collapse
|
18
|
Jennings WC, Gálvez-Arango E, Prieto AL, Boehm AB. CrAssphage for fecal source tracking in Chile: Covariation with norovirus, HF183, and bacterial indicators. WATER RESEARCH X 2020; 9:100071. [PMID: 33083778 PMCID: PMC7552103 DOI: 10.1016/j.wroa.2020.100071] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 08/20/2020] [Accepted: 09/26/2020] [Indexed: 05/12/2023]
Abstract
Anthropogenic fecal pollution in urban waterbodies can promote the spread of waterborne disease. The objective of this study was to test crAssphage, a novel viral human fecal marker not previously applied for fecal source tracking in Latin America, as a fecal pollution marker in an urban river in Chile. Human fecal markers crAssphage CPQ_064 and Bacteroides HF183, the human pathogen norovirus GII, and culturable fecal indicator bacteria (FIB) were quantified at six locations spanning reaches of the Mapocho River from upstream to downstream of Santiago, as well as in repeated sub-daily frequency samples at two urban locations. Norovirus showed positive correlation trends with crAssphage (τ = 0.57, p = 0.06) and HF183 (τ = 0.64, p = 0.03) in river water, but not with E. coli or enterococci. CrAssphage and HF183 concentrations were strongly linearly related (slope = 0.97, p < 0.001). Chlorinated wastewater effluent was an important source of norovirus GII genes to the Mapocho. Precipitation showed non-significant positive relationships with human and general fecal indicators. Concentrations of crAssphage and HF183 in untreated sewage were 8.35 and 8.07 log10 copy/100 ml, respectively. Preliminary specificity testing did not detect crAssphage or HF183 in bird or dog feces, which are predominant non-human fecal sources in the urban Mapocho watershed. This study is the first to test crAssphage for microbial source tracking in Latin America, provides insight into fecal pollution dynamics in a highly engineered natural system, and indicates river reaches where exposure to human fecal pollution may pose a public health risk.
Collapse
Affiliation(s)
- Wiley C. Jennings
- 473 Via Ortega, Room 189, Department of Civil & Environmental Engineering, Stanford University, Stanford, CA, 94305, USA
| | | | - Ana L. Prieto
- Departamento de Ingeniería Civil, Universidad de Chile, Av. Blanco Encalada 2002, 3er Piso, Santiago, Chile
| | - Alexandria B. Boehm
- 473 Via Ortega, Room 189, Department of Civil & Environmental Engineering, Stanford University, Stanford, CA, 94305, USA
- Corresponding author.
| |
Collapse
|
19
|
Wei ZL, Miao J, Yang ZW, Shi DY, Wu HY, Yang D, Yin J, Wang HR, Li HB, Chen ZS, Li JW, Jin M. Contamination sources of the enteric virus in recreational marine water shift in a seasonal pattern. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 743:140641. [PMID: 32653709 DOI: 10.1016/j.scitotenv.2020.140641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/31/2020] [Accepted: 06/28/2020] [Indexed: 06/11/2023]
Abstract
Human enteric virus occurrence in bathing beaches poses a potential health risk to swimmers. They may come from several sources, but the understanding of the seasonal contribution of contamination sources to virus occurrence is still lacking. Here, the surveillance of human enteric viruses at the First Bathing Beach in Qingdao was performed January-December 2018. The occurrence of Enteric viruses, assayed with quantitative polymerase chain reaction (qPCR), was analyzed at temporal and spatial levels to determine the viral contamination sources. The results showed that only Astroviruses (AstVs) and Adenoviruses (HAdVs) were found in the swimming area. Their occurrence correlated significantly with the sewage-polluted area, but HAdVs were only found in autumn and AstVs in spring. Meanwhile, enteric viruses in the swimming area showed significantly higher levels than the surrounding area, particularly AstVs in summer with the swimmer crowd. All these data imply that sewage discharge and swimmers co-contribute to the viral occurrence in a seasonal pattern, with the former being more focused in warm seasons (spring and autumn) and the latter in hot seasons (summer). These results indicate that sewage discharge and crowd swimmers, as unsafe swimming conditions, should be avoided to improve public health at the bathing beaches.
Collapse
Affiliation(s)
- Zi-Lin Wei
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No. 1 Dali Road, Tianjin 300050, China
| | - Jing Miao
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No. 1 Dali Road, Tianjin 300050, China
| | - Zhong-Wei Yang
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No. 1 Dali Road, Tianjin 300050, China
| | - Dan-Yang Shi
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No. 1 Dali Road, Tianjin 300050, China
| | - Hai-Yan Wu
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No. 1 Dali Road, Tianjin 300050, China
| | - Dong Yang
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No. 1 Dali Road, Tianjin 300050, China
| | - Jing Yin
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No. 1 Dali Road, Tianjin 300050, China
| | - Hua-Ran Wang
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No. 1 Dali Road, Tianjin 300050, China
| | - Hai-Bei Li
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No. 1 Dali Road, Tianjin 300050, China
| | - Zheng-Shan Chen
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No. 1 Dali Road, Tianjin 300050, China
| | - Jun-Wen Li
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No. 1 Dali Road, Tianjin 300050, China.
| | - Min Jin
- Department of Environment and Health, Tianjin Institute of Environmental & Operational Medicine, Key Laboratory of Risk Assessment and Control for Environment & Food Safety, No. 1 Dali Road, Tianjin 300050, China.
| |
Collapse
|
20
|
Carratalà A, Bachmann V, Julian TR, Kohn T. Adaptation of Human Enterovirus to Warm Environments Leads to Resistance against Chlorine Disinfection. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:11292-11300. [PMID: 32875801 DOI: 10.1021/acs.est.0c03199] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Sunlight, temperature, and microbial grazing are among the environmental factors promoting the inactivation of viral pathogens in surface waters. Globally, these factors vary across time and space. The persistence of viral pathogens, and ultimately their ecology and dispersion, hinges on their ability to withstand the environmental conditions encountered. To understand how virus populations evolve under changing environmental conditions, we experimentally adapted echovirus 11 (E11) to four climate regimes. Specifically, we incubated E11 in lake water at 10 and 30 °C and in the presence and absence of sunlight. Temperature was the main driver of adaptation, resulting in an increased thermotolerance of the 30 °C adapted populations, whereas the 10 °C adapted strains were rapidly inactivated at higher temperatures. This finding is consistent with a source-sink model in which strains emerging in warm climates can persist in temperate regions, but not vice versa. A microbial risk assessment revealed that the enhanced thermotolerance increases the length of time in which there is an elevated probability of illness associated with swimming in contaminated water. Notably, 30 °C-adapted viruses also exhibited an increased tolerance toward disinfection by free chlorine. Viruses adapting to warm environments may thus become harder to eliminate by common disinfection strategies.
Collapse
Affiliation(s)
- Anna Carratalà
- Laboratory of Environmental Chemistry, School of Architecture, Civil and Environmental Engineering (ENAC), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Virginie Bachmann
- Laboratory of Environmental Chemistry, School of Architecture, Civil and Environmental Engineering (ENAC), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Timothy R Julian
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf8600, Switzerland
- Swiss Tropical and Public Health Institute, Basel 4051, Switzerland
- University of Basel, Basel 4051, Switzerland
| | - Tamar Kohn
- Laboratory of Environmental Chemistry, School of Architecture, Civil and Environmental Engineering (ENAC), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| |
Collapse
|
21
|
Simhon A, Pileggi V, Flemming CA, Lai G, Manoharan M. Norovirus risk at a golf course irrigated with reclaimed water: Should QMRA doses be adjusted for infectiousness? WATER RESEARCH 2020; 183:116121. [PMID: 32877809 DOI: 10.1016/j.watres.2020.116121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 06/25/2020] [Accepted: 06/26/2020] [Indexed: 06/11/2023]
Abstract
About 25 golf courses in Ontario, Canada have environmental compliance approvals to use reclaimed water for irrigation, where disinfection is confirmed through E. coli limits. A previous study at five Ontario municipal wastewater treatment plants (WWTPs) confirmed that enteric viruses are less susceptible to disinfection than E. coli, when plants provided conventional (secondary or tertiary) treatment and routine (chlorine or UV) disinfection. Here we query whether these four treatment-disinfection scenarios plus 60-day lagoon storage of disinfected effluent would be sufficient to reduce norovirus genogroups I and II (NoV GI and GII) risk of infection to tolerable levels for a golfer who incidentally ingests NoV after handling wet golf balls at a golf course irrigated with reclaimed water. We used our RT-qPCR NoV enumeration datasets from the four treatment-disinfection scenarios above and modeled detected and non-detected NoV by Bayesian inference in 'R'. Monte Carlo simulation included pre-disinfection NoV GI and GII gene copy densities; Ontario WWTP-derived chlorine and UV log10 reductions; literature-derived effluent storage decay parameters and golfer ingested volumes, followed by six different NoV dose-response (DR) models. Quantitative Microbial Risk Assessment (QMRA) results suggest that there is an unacceptable NoV infection risk when using the conservative assumption that all detected NoV particles (RT-qPCR gene copies) are infectious, in both aggregated or disaggregated form. However, after adjusting for PCR target sequences and for infectiousness using data from recently published studies on cultivation of human NoV in human intestinal enteroids, we noted a significant reduction of infection risk. However, this less conservative (i.e., less protective) assumption for water reuse applications such as golf course irrigation may not be corroborated until human NoV are efficiently and routinely grown in cell cultures. In addition, further studies on drivers of NoV risk estimation by DR models are needed, e.g., the extent of NoV particle aggregation resulting from wastewater treatment, as well as the role of immunity. Meantime, regulatory agencies could consider more stringent treatment-disinfection requirements that target enteric viruses rather than E. coli and testing of actual reclaimed irrigation waters.
Collapse
Affiliation(s)
- Albert Simhon
- Ontario Ministry of the Environment, Conservation and Parks, Technical Assessment and Standards Development Branch, 40 St. Clair Ave. West, 7th Floor, Toronto, ON, M4V 1M2, Canada.
| | - Vince Pileggi
- Ontario Ministry of the Environment, Conservation and Parks, Technical Assessment and Standards Development Branch, 40 St. Clair Ave. West, 7th Floor, Toronto, ON, M4V 1M2, Canada.
| | - Cecily A Flemming
- Ontario Ministry of the Environment, Conservation and Parks, Technical Assessment and Standards Development Branch, 40 St. Clair Ave. West, 7th Floor, Toronto, ON, M4V 1M2, Canada.
| | - George Lai
- Ontario Ministry of the Environment, Conservation and Parks, Technical Assessment and Standards Development Branch, 40 St. Clair Ave. West, 7th Floor, Toronto, ON, M4V 1M2, Canada.
| | - Mano Manoharan
- Ontario Ministry of the Environment, Conservation and Parks, Technical Assessment and Standards Development Branch, 40 St. Clair Ave. West, 7th Floor, Toronto, ON, M4V 1M2, Canada.
| |
Collapse
|
22
|
Federigi I, Bonadonna L, Bonanno Ferraro G, Briancesco R, Cioni L, Coccia AM, Della Libera S, Ferretti E, Gramaccioni L, Iaconelli M, La Rosa G, Lucentini L, Mancini P, Suffredini E, Vicenza T, Veneri C, Verani M, Carducci A. Quantitative Microbial Risk Assessment as support for bathing waters profiling. MARINE POLLUTION BULLETIN 2020; 157:111318. [PMID: 32658683 DOI: 10.1016/j.marpolbul.2020.111318] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/02/2020] [Accepted: 05/24/2020] [Indexed: 06/11/2023]
Abstract
Profiling bathing waters supported by Quantitative Microbial Risk Assessment (QMRA) is key to the WHO's recommendations for the 2020/2021 revision of the European Bathing Water Directive. We developed an area-specific QMRA model on four pathogens, using fecal indicator concentrations (E. coli, enterococci) for calculating pathogen loads. The predominance of illness was found to be attributable to Human Adenovirus, followed by Salmonella, Vibrio, and Norovirus. Overall, the cumulative illness risk showed a median of around 1 case/10000 exposures. The risk estimates were strongly influenced by the indicators that were used, suggesting the need for a more detailed investigation of the different sources of fecal contamination. Area-specific threshold values for fecal indicators were estimated on a risk-basis by modelling the cumulative risk against E. coli and enterococci concentrations. To improve bathing waters assessment, we suggest considering source apportionment, locally estimating of pathogen/indicator ratios, and calculating site-specific indicators thresholds based on risk assessment.
Collapse
Affiliation(s)
| | - Lucia Bonadonna
- Department of Environment and Health, Istituto Superiore di Sanità, Rome, Italy
| | | | - Rossella Briancesco
- Department of Environment and Health, Istituto Superiore di Sanità, Rome, Italy
| | - Lorenzo Cioni
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56123 Pisa, Italy
| | - Anna Maria Coccia
- Department of Environment and Health, Istituto Superiore di Sanità, Rome, Italy
| | | | - Emanuele Ferretti
- Department of Environment and Health, Istituto Superiore di Sanità, Rome, Italy
| | | | - Marcello Iaconelli
- Department of Environment and Health, Istituto Superiore di Sanità, Rome, Italy
| | - Giuseppina La Rosa
- Department of Environment and Health, Istituto Superiore di Sanità, Rome, Italy
| | - Luca Lucentini
- Department of Environment and Health, Istituto Superiore di Sanità, Rome, Italy
| | - Pamela Mancini
- Department of Environment and Health, Istituto Superiore di Sanità, Rome, Italy
| | - Elisabetta Suffredini
- Department of Food Safety, Nutrition and Veterinary Public Health, Istituto Superiore di Sanità, Rome, Italy
| | - Teresa Vicenza
- Department of Food Safety, Nutrition and Veterinary Public Health, Istituto Superiore di Sanità, Rome, Italy
| | - Carolina Veneri
- Department of Environment and Health, Istituto Superiore di Sanità, Rome, Italy
| | - Marco Verani
- Department of Biology, University of Pisa, Pisa, Italy
| | | |
Collapse
|
23
|
Fuhrmeister E, Ercumen A, Pickering AJ, Jeanis KM, Ahmed M, Brown S, Arnold BF, Hubbard AE, Alam M, Sen D, Islam S, Kabir MH, Kwong LH, Islam M, Unicomb L, Rahman M, Boehm AB, Luby SP, Colford JM, Nelson KL. Predictors of Enteric Pathogens in the Domestic Environment from Human and Animal Sources in Rural Bangladesh. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:10023-10033. [PMID: 31356066 PMCID: PMC6727619 DOI: 10.1021/acs.est.8b07192] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 07/24/2019] [Accepted: 07/29/2019] [Indexed: 05/19/2023]
Abstract
Fecal indicator organisms are measured to indicate the presence of fecal pollution, yet the association between indicators and pathogens varies by context. The goal of this study was to empirically evaluate the relationships between indicator Escherichia coli, microbial source tracking markers, select enteric pathogen genes, and potential sources of enteric pathogens in 600 rural Bangladeshi households. We measured indicators and pathogen genes in stored drinking water, soil, and on mother and child hands. Additionally, survey and observational data on sanitation and domestic hygiene practices were collected. Log10 concentrations of indicator E. coli were positively associated with the prevalence of pathogenic E. coli genes in all sample types. Given the current need to rely on indicators to assess fecal contamination in the field, it is significant that in this study context indicator E. coli concentrations, measured by IDEXX Colilert-18, provided quantitative information on the presence of pathogenic E. coli in different sample types. There were no significant associations between the human fecal marker (HumM2) and human-specific pathogens in any environmental sample type. There was an increase in the prevalence of Giardia lamblia genes, any E. coli virulence gene, and the specific E. coli virulence genes stx1/2 with every log10 increase in the concentration of the animal fecal marker (BacCow) on mothers' hands. Thus, domestic animals were important contributors to enteric pathogens in these households.
Collapse
Affiliation(s)
- Erica
R. Fuhrmeister
- Department
of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
| | - Ayse Ercumen
- School
of Public Health, University of California, Berkeley, California 94720, Unites States
- Department
of Forestry and Environmental Resources, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Amy J. Pickering
- Civil
and Environmental Engineering, Tufts University, Medford, Massachusetts 02153, United States
| | - Kaitlyn M. Jeanis
- Department
of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
| | - Mahaa Ahmed
- Department
of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
| | - Sara Brown
- Department
of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
| | - Benjamin F. Arnold
- School
of Public Health, University of California, Berkeley, California 94720, Unites States
| | - Alan E. Hubbard
- School
of Public Health, University of California, Berkeley, California 94720, Unites States
| | - Mahfuja Alam
- Infectious
Disease Division, International Centre for
Diarrhoeal Disease Research Bangladesh, Dhaka, 1212, Bangladesh
| | - Debashis Sen
- Infectious
Disease Division, International Centre for
Diarrhoeal Disease Research Bangladesh, Dhaka, 1212, Bangladesh
| | - Sharmin Islam
- Infectious
Disease Division, International Centre for
Diarrhoeal Disease Research Bangladesh, Dhaka, 1212, Bangladesh
| | - Mir Himayet Kabir
- Infectious
Disease Division, International Centre for
Diarrhoeal Disease Research Bangladesh, Dhaka, 1212, Bangladesh
| | - Laura H. Kwong
- Department
of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | - Mahfuza Islam
- Infectious
Disease Division, International Centre for
Diarrhoeal Disease Research Bangladesh, Dhaka, 1212, Bangladesh
| | - Leanne Unicomb
- Infectious
Disease Division, International Centre for
Diarrhoeal Disease Research Bangladesh, Dhaka, 1212, Bangladesh
| | - Mahbubur Rahman
- Infectious
Disease Division, International Centre for
Diarrhoeal Disease Research Bangladesh, Dhaka, 1212, Bangladesh
| | - Alexandria B. Boehm
- Department
of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | - Stephen P. Luby
- Woods
Institute for the Environment, Stanford
University, Stanford, California 94305, United States
| | - John M. Colford
- School
of Public Health, University of California, Berkeley, California 94720, Unites States
| | - Kara L. Nelson
- Department
of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
| |
Collapse
|
24
|
Miller-Pierce MR, Rhoads NA. Clostridium perfringens testing improves the reliability of detecting non-point source sewage contamination in Hawaiian coastal waters compared to using Enterococci alone. MARINE POLLUTION BULLETIN 2019; 144:36-47. [PMID: 31180005 DOI: 10.1016/j.marpolbul.2019.04.053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 04/12/2019] [Accepted: 04/20/2019] [Indexed: 06/09/2023]
Abstract
Non-point sources of sewage-related pollution in tropical marine waters are difficult to ascertain. Enterococci (ENT) are widely used as indicators of human waste but their efficacy in tropical waters is highly debated due to natural presence in tropical soils. Clostridium perfringens (CP) is often used as a secondary indicator of fecal contamination because its presence indicates sewage, and in tropical waters environmental sources are unlikely. We analyzed a 27-year dataset containing over 29,000 samples collected by the State of Hawaii, to determine a proposed CP standard for detecting human sewage, which has applicability throughout tropical marine waters globally. Measured ENT concentrations were highly correlated with turbidity. In three instances, sewage contamination was not detected by ENT samples alone, and impairments from non-point pollution may be highly misinformed in Hawaii. The EPA should examine relationships between CP and human health and implement CP as the primary FIB in tropical marine waters.
Collapse
Affiliation(s)
- Mailea R Miller-Pierce
- School of Biological Sciences and NSPIRE IGERT, Washington State University, 14204 NE Salmon Creek Avenue, Vancouver, WA 98686, USA.
| | - Neil A Rhoads
- School of Biological Sciences and NSPIRE IGERT, Washington State University, 14204 NE Salmon Creek Avenue, Vancouver, WA 98686, USA
| |
Collapse
|
25
|
Federigi I, Verani M, Donzelli G, Cioni L, Carducci A. The application of quantitative microbial risk assessment to natural recreational waters: A review. MARINE POLLUTION BULLETIN 2019; 144:334-350. [PMID: 31180003 DOI: 10.1016/j.marpolbul.2019.04.073] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 04/26/2019] [Accepted: 04/28/2019] [Indexed: 06/09/2023]
Abstract
This review examines the aims of and approaches to the Quantitative Microbial Risk Assessment (QMRA) of untreated recreational waters. The literature search was conducted on four databases and yielded 54 papers, which were analyzed on a quantitative (time-trend, geographical distribution, water type) and qualitative (aims, source of microbial data, pathogens and their measurement or estimation, ways to address variability and uncertainty, sensitivity analysis) basis. In addition, the parameters, implications, and limitations were discussed for each QMRA step. Since 2003, the number of papers has greatly increased, highlighting the importance of QMRA for the risk management of recreational waters. Nevertheless, QMRA still exhibits critical issues, above all regarding contamination data and dose-response relationships. To our knowledge, this is the first review to give a wide panoramic view on QMRA in relation to recreational exposure to untreated waters. This could be useful in identifying the current knowledge gaps and research needs.
Collapse
Affiliation(s)
- Ileana Federigi
- QMRA Lab, Department of Biology, University of Pisa, Via S. Zeno 35/39, Pisa 56127, Italy.
| | - Marco Verani
- QMRA Lab, Department of Biology, University of Pisa, Via S. Zeno 35/39, Pisa 56127, Italy.
| | - Gabriele Donzelli
- QMRA Lab, Department of Biology, University of Pisa, Via S. Zeno 35/39, Pisa 56127, Italy.
| | - Lorenzo Cioni
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56123 Pisa, Italy.
| | - Annalaura Carducci
- QMRA Lab, Department of Biology, University of Pisa, Via S. Zeno 35/39, Pisa 56127, Italy.
| |
Collapse
|
26
|
Gularte JS, Girardi V, Demoliner M, de Souza FG, Filippi M, Eisen AKA, Mena KD, de Quevedo DM, Rigotto C, de Barros MP, Spilki FR. Human mastadenovirus in water, sediment, sea surface microlayer, and bivalve mollusk from southern Brazilian beaches. MARINE POLLUTION BULLETIN 2019; 142:335-349. [PMID: 31232312 DOI: 10.1016/j.marpolbul.2018.12.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 12/27/2018] [Indexed: 06/09/2023]
Abstract
Anthropogenic contamination of beaches in the south of Brazil was assessed by detection of Escherichia coli, human mastadenovirus species C (HAdV-C) and F (HAdV-F) and hepatitis E virus (HEV). Sampling was carried out in October (2016), and in January, April and July (2017). Water, sediment, sea surface microlayer (SML), bivalves, and air sentinel samples were evaluated. Quantitative microbiological risk assessment (QMRA) was used to estimate the probability of swimmer infection. HAdV-C was present in 26% of the samples, for both qPCR and viral isolation. The highest rates of detection in genomic copies (GC) were in water (2.42E+10 GC/L), SML (2.08E+10 GC/L), sediment (3.82E+08 GC/g) and bivalves (3.91E+07 GC/g). QMRA estimated daily and annual risks with a maximum value (9.99E-01) in almost all of the samples. Viable HAdV-C was often detected in the SML, pointing that this is a source of infection for people bathing in these waters.
Collapse
Affiliation(s)
- Juliana Schons Gularte
- Laboratório de Microbiologia Molecular, Universidade Feevale, ERS 239, no 2755, Novo Hamburgo, RS 93352-000, Brazil.
| | - Viviane Girardi
- Laboratório de Microbiologia Molecular, Universidade Feevale, ERS 239, no 2755, Novo Hamburgo, RS 93352-000, Brazil
| | - Meriane Demoliner
- Laboratório de Microbiologia Molecular, Universidade Feevale, ERS 239, no 2755, Novo Hamburgo, RS 93352-000, Brazil
| | - Fernanda Gil de Souza
- Laboratório de Vírus, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, no 6627, Belo Horizonte, MG, Brazil
| | - Micheli Filippi
- Laboratório de Microbiologia Molecular, Universidade Feevale, ERS 239, no 2755, Novo Hamburgo, RS 93352-000, Brazil
| | - Ana Karolina Antunes Eisen
- Laboratório de Microbiologia Molecular, Universidade Feevale, ERS 239, no 2755, Novo Hamburgo, RS 93352-000, Brazil
| | - Kristina D Mena
- School of Public Health, The University of Texas Health Science Center at Houston, El Paso, TX 79902, USA
| | - Daniela Muller de Quevedo
- Programa de Pós-Graduação em Qualidade Ambiental, Universidade Feevale, ERS 239, no 2755, Novo Hamburgo, RS 93352-000, Brazil
| | - Caroline Rigotto
- Laboratório de Microbiologia Molecular, Universidade Feevale, ERS 239, no 2755, Novo Hamburgo, RS 93352-000, Brazil
| | - Marcelo Pereira de Barros
- Curso de Ciências Biológicas, Universidade Feevale, ERS 239, no 2755, Novo Hamburgo, RS 93352-000, Brazil
| | - Fernando Rosado Spilki
- Laboratório de Microbiologia Molecular, Universidade Feevale, ERS 239, no 2755, Novo Hamburgo, RS 93352-000, Brazil
| |
Collapse
|
27
|
Mushi D. Clostridium perfringens identifies source of pollution and reference streams in a tropical highland environment. JOURNAL OF WATER AND HEALTH 2018; 16:501-507. [PMID: 30067233 DOI: 10.2166/wh.2018.192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Clostridium perfringens was analysed in soils from a tropical highland catchment and corresponding headwater streams at baseflow condition in order to understand the contribution of soils to the microbiological quality of stream water and the feasibility of using these streams as surrogate for negative control (reference streams). The concentrations of C. perfringens depended on the sample matrix. C. perfringens concentrations were significantly higher in the catchment soil than in the stream water (P < 0.05, n = 20). In addition, C. perfringens concentrations in the catchment soil remarkably predicted C. perfringens concentrations in the stream water (i.e., 82% of variations in C. perfringens concentrations in water were predicted by C. perfringens concentrations in soil; P < 0.05, n = 20). This suggests that the catchment soils contributed C. perfringens to the stream water. Despite the observed contamination, the concentrations of C. perfringens (geometric mean of 32 cfu/100 cm3) in the stream water was below the recommended safe level for tropical freshwater systems and extremely lower than that detected in anthropogenically influenced rivers. This concentration was defined as an acceptable level of disturbance, and a reference concentration that can serve as surrogate for negative control in the studied tropical environment.
Collapse
Affiliation(s)
- Douglas Mushi
- Sokoine University of Agriculture, Solomon Mahlangu College of Science and Education, Department of Biosciences, PO Box 3038, Morogoro, Tanzania E-mail:
| |
Collapse
|
28
|
Ahmed W, Hamilton KA, Lobos A, Hughes B, Staley C, Sadowsky MJ, Harwood VJ. Quantitative microbial risk assessment of microbial source tracking markers in recreational water contaminated with fresh untreated and secondary treated sewage. ENVIRONMENT INTERNATIONAL 2018; 117:243-249. [PMID: 29772486 DOI: 10.1016/j.envint.2018.05.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/05/2018] [Accepted: 05/05/2018] [Indexed: 05/09/2023]
Abstract
Microbial source tracking (MST) methods have provided the means to identify sewage contamination in recreational waters, but the risk associated with elevated levels of MST targets such as sewage-associated Bacteroides HF183 and other markers is uncertain. Quantitative microbial risk assessment (QMRA) modeling allows interpretation of MST data in the context of the risk of gastrointestinal (GI) illness caused by exposure to pathogens. In this study, five sewage-associated, quantitative PCR (qPCR) MST markers [Bacteroides HF183 (HF183), Methanobrevibacter smithii nifH (nifH), human adenovirus (HAdV), human polyomavirus (HPyV) and pepper mild mottle virus (PMMoV)] were evaluated to determine at what concentration these nucleic acid markers reflected a significant health risk from exposure to fresh untreated or secondary treated sewage in beach water. The QMRA models were evaluated for a target probability of illness of 36 GI illnesses/1000 swimming events (i.e., risk benchmark 0.036) for the reference pathogens norovirus (NoV) and human adenovirus 40/41 (HAdV 40/41). Sewage markers at several dilutions exceeded the risk benchmark for reference pathogens NoV and HAdV 40/41. HF183 concentrations 3.22 × 103 (for both NoV and HAdV 40/41) gene copies (GC)/100 mL of water contaminated with fresh untreated sewage represented risk >0.036. Similarly, HF183 concentrations 3.66 × 103 (for NoV and HAdV 40/41) GC/100 mL of water contaminated with secondary treated sewage represented risk >0.036. HAdV concentration as low as 4.11 × 101 GC/100 mL of water represented risk >0.036 when water was contaminated with secondary treated sewage. Results of this study provide a valuable context for water quality managers to evaluate human health risks associated with contamination from fresh sewage. The approach described here may also be useful in the future for evaluating health risks from contamination with aged or treated sewage or feces from other animal sources as more data are made available.
Collapse
Affiliation(s)
- Warish Ahmed
- CSIRO Land and Water, Ecosciences Precinct, 41 Boggo Road, QLD 4102, Australia.
| | - Kerry A Hamilton
- Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA
| | - Aldo Lobos
- Department of Integrative Biology, SCA 110, University of South Florida, 4202 East Fowler Ave, Tampa, FL 33620, USA
| | - Bridie Hughes
- CSIRO Land and Water, Ecosciences Precinct, 41 Boggo Road, QLD 4102, Australia
| | - Christopher Staley
- BioTechnology Institute, University of Minnesota, 1479 Gortner Ave, St. Paul, MN 55108, USA
| | - Michael J Sadowsky
- BioTechnology Institute, University of Minnesota, 1479 Gortner Ave, St. Paul, MN 55108, USA; Department of Soil, Water and Climate, 1991 Upper Buford Circle, Room 439, Saint Paul, MN 55108, USA
| | - Valerie J Harwood
- Department of Integrative Biology, SCA 110, University of South Florida, 4202 East Fowler Ave, Tampa, FL 33620, USA
| |
Collapse
|
29
|
Soller JA, Eftim SE, Nappier SP. Direct potable reuse microbial risk assessment methodology: Sensitivity analysis and application to State log credit allocations. WATER RESEARCH 2018; 128:286-292. [PMID: 29107913 PMCID: PMC6816270 DOI: 10.1016/j.watres.2017.10.034] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/12/2017] [Accepted: 10/17/2017] [Indexed: 05/03/2023]
Abstract
Understanding pathogen risks is a critically important consideration in the design of water treatment, particularly for potable reuse projects. As an extension to our published microbial risk assessment methodology to estimate infection risks associated with Direct Potable Reuse (DPR) treatment train unit process combinations, herein, we (1) provide an updated compilation of pathogen density data in raw wastewater and dose-response models; (2) conduct a series of sensitivity analyses to consider potential risk implications using updated data; (3) evaluate the risks associated with log credit allocations in the United States; and (4) identify reference pathogen reductions needed to consistently meet currently applied benchmark risk levels. Sensitivity analyses illustrated changes in cumulative annual risks estimates, the significance of which depends on the pathogen group driving the risk for a given treatment train. For example, updates to norovirus (NoV) raw wastewater values and use of a NoV dose-response approach, capturing the full range of uncertainty, increased risks associated with one of the treatment trains evaluated, but not the other. Additionally, compared to traditional log-credit allocation approaches, our results indicate that the risk methodology provides more nuanced information about how consistently public health benchmarks are achieved. Our results indicate that viruses need to be reduced by 14 logs or more to consistently achieve currently applied benchmark levels of protection associated with DPR. The refined methodology, updated model inputs, and log credit allocation comparisons will be useful to regulators considering DPR projects and design engineers as they consider which unit treatment processes should be employed for particular projects.
Collapse
Affiliation(s)
- Jeffrey A Soller
- Soller Environmental, LLC, 3022 King St, Berkeley, CA, 94703, USA
| | | | - Sharon P Nappier
- U.S. Environmental Protection Agency, Office of Water, Office of Science and Technology, 1200 Pennsylvania Avenue, NW, Washington, DC, 20460, USA.
| |
Collapse
|
30
|
Brown KI, Graham KE, Soller JA, Boehm AB. Estimating the probability of illness due to swimming in recreational water with a mixture of human- and gull-associated microbial source tracking markers. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2017; 19:1528-1541. [PMID: 29114693 DOI: 10.1039/c7em00316a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Beaches often receive fecal contamination from more than one source. Human sources include untreated sewage as well as treated wastewater effluent, and animal sources include wildlife such as gulls. Different contamination sources are expected to pose different health risks to swimmers. Genetic microbial source tracking (MST) markers can be used to detect bacteria that are associated with different animal sources, but the health risks associated with a mixture of MST markers are unknown. This study presents a method for predicting these health risks, using human- and gull-associated markers as an example. Quantitative Microbial Risk Assessment (QMRA) is conducted with MST markers as indicators. We find that risks associated with exposure to a specific concentration of a human-associated MST marker (HF) are greater if the HF source is untreated sewage rather than treated wastewater effluent. We also provide a risk-based threshold of HF from untreated sewage at a beach, to stay below a predicted illness risk of 3 per 100 swimmers, that is a function of gull-associated MST marker (CAT) concentration.
Collapse
Affiliation(s)
- Kendra I Brown
- Department of Civil and Environmental Engineering, Environmental Engineering and Science, Stanford University, 94305-4020, USA.
| | | | | | | |
Collapse
|
31
|
Allende A, Datta AR, Smith WA, Adonis R, MacKay A, Adell AD. Implications of new legislation (US FSMA) and guidelines (EC) on the establishment of management systems for agricultural water. Food Microbiol 2017; 75:119-125. [PMID: 30056956 DOI: 10.1016/j.fm.2017.10.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Revised: 10/03/2017] [Accepted: 10/07/2017] [Indexed: 01/13/2023]
Abstract
This report summarizes key messages related to agricultural water quality as discussed by an ad hoc panel at the 1st International Symposium of Food Safety in Santiago, Chile. Participating representatives of the academia, industry and government of diverse geographical backgrounds and the audience discussed topics such as (1) implications of the US Food Safety Modernization Act (FSMA: www.fda.gov/Food/GuidanceRegulation/FSMA/ucm277706.htm) on the Agricultural Water Quality, (2) comparisons between MPN and CFU in analyzing water quality, (3) alternatives to fecal indicator bacteria (FIB) to be used as indicators to evaluate water quality, and (4) vegetative buffers as an alternative to reduce pathogen loads in agricultural surface waters. Panelists identified the following key messages for each topic discussed that are related to agricultural water quality: (1) the FSMA regulation and the new guidance document elaborated by the EC are highly relevant as they provide a definition of agricultural water and specific criteria for different water uses and circumstances; (2) FSMA supports modification from MPN to CFU; (3) Growers require more alternatives for treatment of agricultural water; (4) Vegetative buffers are a potential practical and feasible alternative for agriculture producers to reduce the pathogen and fecal pollution loads of in their agricultural waters.
Collapse
Affiliation(s)
- A Allende
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, Murcia, Spain
| | - A R Datta
- Center for Food Safety and Applied Nutrition, US Food and Drug Administration, Laurel, MD 20708, USA
| | - W A Smith
- One Health Institute, School of Veterinary Medicine, One Shields Avenue, University of California, Davis, CA 95616, USA
| | - R Adonis
- Fundacion para el Desarrollo Fruticola (FDF), Av Pedro de Valdivia 0193 of 22, Santiago, Chile.
| | - A MacKay
- Canadian Food Inspection Agency, Food Safety Science Directorate, 1400Merivale, Ottawa, Ontario, K1A 0Y9, Canada
| | - A D Adell
- Escuela de Medicina Veterinaria, Facultad de Ecologia y Recursos Naturales, Universidad Andres Bello, Republica 440, 8370251 Santiago, Chile.
| |
Collapse
|
32
|
Soller JA, Schoen M, Steele JA, Griffith JF, Schiff KC. Incidence of gastrointestinal illness following wet weather recreational exposures: Harmonization of quantitative microbial risk assessment with an epidemiologic investigation of surfers. WATER RESEARCH 2017; 121:280-289. [PMID: 28558279 DOI: 10.1016/j.watres.2017.05.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 05/02/2017] [Accepted: 05/08/2017] [Indexed: 05/26/2023]
Abstract
We modeled the risk of gastrointestinal (GI) illness associated with recreational exposures to marine water following storm events in San Diego County, California. We estimated GI illness risks via quantitative microbial risk assessment (QMRA) techniques by consolidating site specific pathogen monitoring data of stormwater, site specific dilution estimates, literature-based water ingestion data, and literature based pathogen dose-response and morbidity information. Our water quality results indicated that human sources of contamination contribute viral and bacterial pathogens to streams draining an urban watershed during wet weather that then enter the ocean and affect nearshore water quality. We evaluated a series of approaches to account for uncertainty in the norovirus dose-response model selection and compared our model results to those from a concurrently conducted epidemiological study that provided empirical estimates for illness risk following ocean exposure. The preferred norovirus dose-response approach yielded median risk estimates for water recreation-associated illness (15 GI illnesses per 1000 recreation events) that closely matched the reported epidemiological results (12 excess GI illnesses per 1000 wet weather recreation events). The results are consistent with norovirus, or other pathogens associated with norovirus, as an important cause of gastrointestinal illness among surfers in this setting. This study demonstrates the applicability of QMRA for recreational water risk estimation, even under wet weather conditions and describes a process that might be useful in developing site-specific water quality criteria in this and other locations.
Collapse
Affiliation(s)
- Jeffrey A Soller
- Soller Environmental, LLC, 3022 King St., Berkeley, CA 94703, USA.
| | - Mary Schoen
- Soller Environmental, LLC, 3022 King St., Berkeley, CA 94703, USA
| | - Joshua A Steele
- Southern California Coastal Water Research Project, 3535 Harbor Blvd #110, Costa Mesa, CA 92626, USA
| | - John F Griffith
- Southern California Coastal Water Research Project, 3535 Harbor Blvd #110, Costa Mesa, CA 92626, USA
| | - Kenneth C Schiff
- Southern California Coastal Water Research Project, 3535 Harbor Blvd #110, Costa Mesa, CA 92626, USA
| |
Collapse
|
33
|
Risk factors for gastroenteritis associated with canal swimming in two cities in the Netherlands during the summer of 2015: A prospective study. PLoS One 2017; 12:e0174732. [PMID: 28369101 PMCID: PMC5378355 DOI: 10.1371/journal.pone.0174732] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 03/14/2017] [Indexed: 12/25/2022] Open
Abstract
Urban canal swimming events are popular in the Netherlands. In 2015, two city canal swimming events took place, in Utrecht (Utrecht Singel Swim, USS) and in Amsterdam (Amsterdam City Swim, ACS). This prospective study characterizes the health risks associated with swimming in urban waters. Online questionnaires were sent to 160 (USS) and 2,692 (ACS) participants, with relatives of participants who did not swim completing the questionnaire as a control. Swimming water specimens and stool specimens of diarrheic participants in the ACS group were analysed. A total of 49% of USS and 51% of ACS swimmers returned their questionnaires. Nine percent of USS swimmers and 4% of non-swimmers reported gastrointestinal complaints (aRR 2.1; 95% CI: 0.3–16), while a total of 31% of ACS swimmers and 5% of non-swimmers reported gastrointestinal complaints (aRR 6.3; 95% CI: 4.1–9.5). AGI risk among ACS participants was directly related to increasing number of mouthfuls of water swallowed. Various norovirus genotypes were detected in five out of seven stool specimens taken from ACS participants and in all three tested ACS water samples. We conclude that the AGI risk among open-water swimmers in urban areas depends on the circumstances around the event. The epidemiological curve, the statistical association between swimming and AGI, and the microbiological evidence for norovirus in stool and water specimens suggest that AGI outbreak after the ACS event was due to water contamination by multiple norovirus strains, which is possibly linked to sewage overflow due to prior heavy rainfall. There is need for more targeted preventive measurements and recommendations for organizers, municipal authorities and participants to prevent this reoccurring in the future.
Collapse
|
34
|
Eftim SE, Hong T, Soller J, Boehm A, Warren I, Ichida A, Nappier SP. Occurrence of norovirus in raw sewage - A systematic literature review and meta-analysis. WATER RESEARCH 2017; 111:366-374. [PMID: 28110140 DOI: 10.1016/j.watres.2017.01.017] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 01/04/2017] [Accepted: 01/06/2017] [Indexed: 05/19/2023]
Abstract
Human noroviruses (NoV) are a leading cause of recreational waterborne illnesses and responsible for the majority of viral-associated gastrointestinal illnesses nationwide. We conducted a systematic literature review of published peer-reviewed publications to identify NoV density data in wastewater influent, and provided an approach for developing pathogen density distributions, using the NoV data. Literature review inclusion criteria included scope, study quality, and data availability. A non-parametric bootstrap statistical model was used to estimate the NoV distribution in wastewater influent. The approach used accounts for heterogeneity in study-specific distribution curves, sampling locations, and sampling season and provides a comprehensive representation of the data. Study results illustrate that pooling all of the available NoV data together in a meta-analysis provides a more comprehensive understanding of the technical literature than what could be appreciated from individual studies. The studies included in this analysis indicate a high density of NoV in wastewater influent (overall mean = 4.6 log10 genome copies (GC)/liter (L)), with a higher density of NoV genogroup (G) II (overall mean = 4.9 log10 GC/L) than for GI (overall mean = 4.4 log10 GC/L for GI). The bootstrapping approach was also used to account for differences in seasonal and geographical occurrences of NoV GI and GII. The methods presented are reproducible and can be used to develop QMRA-ready density distributions for other viral pathogens in wastewater influent, effluent, and ambient waters. To our knowledge, our results are the first to quantitatively characterize seasonal and geographic differences, which could be particularly useful for future risk assessments.
Collapse
Affiliation(s)
| | - Tao Hong
- ICF, LLC, 9300 Lee Highway, Fairfax, VA, 22031, USA
| | - Jeffrey Soller
- Soller Environmental, LLC, 3022 King St, Berkeley, CA, 94703, USA
| | | | - Isaac Warren
- ICF, LLC, 9300 Lee Highway, Fairfax, VA, 22031, USA
| | | | - Sharon P Nappier
- U.S. Environmental Protection Agency, Office of Water, Office of Science and Technology, 1200 Pennsylvania Avenue, NW, Washington, DC, 20460, USA
| |
Collapse
|
35
|
Van Abel N, Schoen ME, Kissel JC, Meschke JS. Comparison of Risk Predicted by Multiple Norovirus Dose-Response Models and Implications for Quantitative Microbial Risk Assessment. RISK ANALYSIS : AN OFFICIAL PUBLICATION OF THE SOCIETY FOR RISK ANALYSIS 2017; 37:245-264. [PMID: 27285380 DOI: 10.1111/risa.12616] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 02/26/2016] [Accepted: 03/01/2016] [Indexed: 05/06/2023]
Abstract
The application of quantitative microbial risk assessments (QMRAs) to understand and mitigate risks associated with norovirus is increasingly common as there is a high frequency of outbreaks worldwide. A key component of QMRA is the dose-response analysis, which is the mathematical characterization of the association between dose and outcome. For Norovirus, multiple dose-response models are available that assume either a disaggregated or an aggregated intake dose. This work reviewed the dose-response models currently used in QMRA, and compared predicted risks from waterborne exposures (recreational and drinking) using all available dose-response models. The results found that the majority of published QMRAs of norovirus use the 1 F1 hypergeometric dose-response model with α = 0.04, β = 0.055. This dose-response model predicted relatively high risk estimates compared to other dose-response models for doses in the range of 1-1,000 genomic equivalent copies. The difference in predicted risk among dose-response models was largest for small doses, which has implications for drinking water QMRAs where the concentration of norovirus is low. Based on the review, a set of best practices was proposed to encourage the careful consideration and reporting of important assumptions in the selection and use of dose-response models in QMRA of norovirus. Finally, in the absence of one best norovirus dose-response model, multiple models should be used to provide a range of predicted outcomes for probability of infection.
Collapse
Affiliation(s)
- Nicole Van Abel
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, USA
| | - Mary E Schoen
- Soller Environmental, Berkeley, Inc., Berkeley, CA, USA
| | - John C Kissel
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, USA
| | - J Scott Meschke
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, USA
| |
Collapse
|
36
|
Waterborne Viruses and F-Specific Coliphages in Mixed-Use Watersheds: Microbial Associations, Host Specificities, and Affinities with Environmental/Land Use Factors. Appl Environ Microbiol 2017; 83:AEM.02763-16. [PMID: 27836843 DOI: 10.1128/aem.02763-16] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 11/08/2016] [Indexed: 02/06/2023] Open
Abstract
From the years 2008 to 2014, a total of 1,155 water samples were collected (spring to fall) from 24 surface water sampling sites located in a mixed-used but predominantly agricultural (i.e., dairy livestock production) river basin in eastern Ontario, Canada. Water was analyzed for viable F-specific DNA (F-DNA) and F-specific RNA (F-RNA) (genogroup I [GI] to GIV) coliphage and a suite of molecularly detected viruses (norovirus [GI to GIV], torque teno virus [TTV], rotavirus, kobuvirus, adenovirus, astrovirus, hepatitis A, and hepatitis E). F-DNA and F-RNA coliphage were detected in 33 and 28% of the samples at maximum concentrations of 2,000 and 16,300 PFU · 100 ml-1, respectively. Animal TTV, human TTV, kobuvirus, astrovirus, and norovirus GIII were the most prevalent viruses, found in 23, 20, 13, 12, and 11% of samples, respectively. Viable F-DNA coliphage was found to be a modest positive indicator of molecularly detected TTV. F-RNA coliphage, unlike F-DNA coliphage, was a modest positive predictor of norovirus and rotavirus. There were, however, a number of significant negative associations among F-specific coliphage and viruses. F-DNA coliphage densities of >142 PFU · 100 ml-1 delineated conditions when ∼95% of water samples contained some type of virus. Kobuvirus was the virus most strongly related to detection of any other virus. Land use had some associations with virus/F-specific coliphage detection, but season and surface water flow were the variables that were most important for broadly delineating detection. Higher relative levels of detection of human viruses and human F-RNA coliphage were associated with higher relative degrees of upstream human land development in a catchment. IMPORTANCE This study is one of the first, to our knowledge, to evaluate relationships among F-specific coliphages and a large suite of enteric viruses in mixed-use but agriculturally dominated surface waters in Canada. This study suggested that relationships between viable F-specific coliphages and molecularly detected viruses do exist, but they are not always positive. Caution should be employed if viable F-specific coliphages are to be used as indicators of virus presence in surface waters. This study elucidates relative effects of agriculture, wildlife, and human activity on virus and F-specific coliphage detection. Seasonal and meteorological attributes play a strong role in the detection of most virus and F-specific coliphage targets.
Collapse
|
37
|
Mattioli MC, Sassoubre LM, Russell TL, Boehm AB. Decay of sewage-sourced microbial source tracking markers and fecal indicator bacteria in marine waters. WATER RESEARCH 2017; 108:106-114. [PMID: 27855952 DOI: 10.1016/j.watres.2016.10.066] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 10/24/2016] [Indexed: 05/20/2023]
Abstract
The decay of sewage-sourced enterococci, Escherichia coli, three human-associated microbial source tracking (MST) markers, Salmonella, Campylobacter, and norovirus GII was measured in situ in coastal, marine waters. Experiments examined the effects of sunlight intensity and season on decay. Seawater was seeded with untreated sewage, placed into permeable dialysis bags, and deployed in the coastal ocean near the water surface, and at 18 cm, and 99 cm depths, to vary solar intensity, during winter and summer seasons. Microbial decay was modeled using a log-linear or shoulder log-linear decay model. Pathogen levels were too low in sewage to obtain kinetic parameters. Human-associated MST markers all decayed with approximately the same rate constant (k ∼ 1.5 d-1) in all experimental treatments, suggesting markers could be detectable up to ∼6 days after a raw sewage spill. E. coli and enterococci (culturable and molecular marker) k significantly varied with season and depth; enterococci decayed faster at shallow depths and during the summer, while E. coli decayed faster at shallow depths and during the winter. Rate constants for MST markers and culturable FIB diverged except at the deepest depth in the water column potentially complicating the use of MST marker concentrations to allocate sources of FIB contamination.
Collapse
Affiliation(s)
- Mia Catharine Mattioli
- Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, United States
| | - Lauren M Sassoubre
- Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, United States
| | - Todd L Russell
- Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, United States
| | - Alexandria B Boehm
- Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, United States.
| |
Collapse
|
38
|
Boehm AB, Wang D, Ercumen A, Shea M, Harris AR, Shanks OC, Kelty C, Ahmed A, Mahmud ZH, Arnold BF, Chase C, Kullmann C, Colford JM, Luby SP, Pickering AJ. Occurrence of Host-Associated Fecal Markers on Child Hands, Household Soil, and Drinking Water in Rural Bangladeshi Households. ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS 2016; 3:393-398. [PMID: 32607385 DOI: 10.1021/acs.estlett.6b00382] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We evaluated whether provision and promotion of improved sanitation hardware (toilets and child feces management tools) reduced rotavirus and human fecal contamination of drinking water, child hands, and soil among rural Bangladeshi compounds enrolled in a cluster-randomized trial. We also measured host-associated genetic markers of ruminant and avian feces. We found evidence of widespread ruminant and avian fecal contamination in the compound environment; non-human fecal marker occurrence scaled with animal ownership. Strategies for controlling non- human fecal waste should be considered when designing interventions to reduce exposure to fecal contamination in low-income settings. Detection of a human- associated fecal marker and rotavirus was rare and unchanged by provision and promotion of improved sanitation to intervention compounds. The sanitation intervention reduced ruminant fecal contamination in drinking water and general (non-host specific) fecal contamination in soil but overall had limited effects on reducing fecal contamination in the household environment.
Collapse
Affiliation(s)
- Alexandria B Boehm
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | - Dan Wang
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | - Ayse Ercumen
- Division of Epidemiology, University of California, Berkeley, Berkeley, California 94720, United States
| | - Meghan Shea
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | - Angela R Harris
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | - Orin C Shanks
- Office of Research & Development, U.S. Environmental Protection Agency, Cincinnati, Ohio 45268, United States
| | - Catherine Kelty
- Office of Research & Development, U.S. Environmental Protection Agency, Cincinnati, Ohio 45268, United States
| | - Alvee Ahmed
- International Center for Diarrheal Diseases Research, Bangladesh, Dhaka 1000, Bangladesh
| | - Zahid Hayat Mahmud
- International Center for Diarrheal Diseases Research, Bangladesh, Dhaka 1000, Bangladesh
| | - Benjamin F Arnold
- Division of Epidemiology, University of California, Berkeley, Berkeley, California 94720, United States
| | - Claire Chase
- The World Bank, Washington, D.C. 20433, United States
| | | | - John M Colford
- Division of Epidemiology, University of California, Berkeley, Berkeley, California 94720, United States
| | - Stephen P Luby
- Woods Institute for the Environment, Stanford University, Stanford, California 94305, United States
| | - Amy J Pickering
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
- Woods Institute for the Environment, Stanford University, Stanford, California 94305, United States
| |
Collapse
|
39
|
Vergara GGRV, Rose JB, Gin KYH. Risk assessment of noroviruses and human adenoviruses in recreational surface waters. WATER RESEARCH 2016; 103:276-282. [PMID: 27472908 DOI: 10.1016/j.watres.2016.07.048] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 07/01/2016] [Accepted: 07/20/2016] [Indexed: 05/07/2023]
Abstract
In the interest of public health and safety, this study aimed to quantify risks associated with the presence of noroviruses (NoV) and human adenoviruses (HAdV) in an urban catchment area in Singapore. Enteric viruses were quantified using QPCR. NoV were more prevalent in water samples than HAdV, and presented higher associated illness risks across all exposure scenarios. For primary contact recreation of adults and children, mean probability of illness were 0.0061 and 0.0089 for NoV, and 0.0028 and 0.0048 for HAdV. For secondary contact recreation, mean probability of illness were 0.0016 for NoV and 0.00068 for HAdV. Therefore, owing to their prevalence and associated risks, NoV are better suited as reference pathogens in recreational waters in Singapore.
Collapse
Affiliation(s)
- G G R V Vergara
- Department of Civil and Environmental Engineering, Faculty of Engineering, National University of Singapore, Blk E1A-07-03, 1 Engineering Drive 2, Singapore 117576, Singapore
| | - J B Rose
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, MI, USA
| | - K Y H Gin
- Department of Civil and Environmental Engineering, Faculty of Engineering, National University of Singapore, Blk E1A-07-03, 1 Engineering Drive 2, Singapore 117576, Singapore; NUS Environmental Research Institute, National University of Singapore, Singapore.
| |
Collapse
|
40
|
Forecasted Impact of Climate Change on Infectious Disease and Health Security in Hawaii by 2050. Disaster Med Public Health Prep 2016; 10:797-804. [PMID: 27515507 DOI: 10.1017/dmp.2016.73] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Climate change is expected to cause extensive shifts in the epidemiology of infectious and vector-borne diseases. Scenarios on the effects of climate change typically attribute altered distribution of communicable diseases to a rise in average temperature and altered incidence of infectious diseases to weather extremes. METHODS Recent evaluations of the effects of climate change on Hawaii have not explored this link. It may be expected that Hawaii's natural geography and robust water, sanitation, and health care infrastructure renders residents less vulnerable to many threats that are the focus on smaller, lesser developed, and more vulnerable Pacific islands. In addition, Hawaii's communicable disease surveillance and response system can act rapidly to counter increases in any disease above baseline and to redirect resources to deal with changes, particularly outbreaks due to exotic pathogens. RESULTS The evidence base examined in this article consistently revealed very low climate sensitivity with respect to infectious and mosquito-borne diseases. CONCLUSIONS A community resilience model is recommended to increase adaptive capacity for all possible climate change impacts rather an approach that focuses specifically on communicable diseases. (Disaster Med Public Health Preparedness. 2016;10:797-804).
Collapse
|
41
|
Timm C, Luther S, Jurzik L, Hamza IA, Kistemann T. Applying QMRA and DALY to assess health risks from river bathing. Int J Hyg Environ Health 2016; 219:681-692. [PMID: 27590614 DOI: 10.1016/j.ijheh.2016.07.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 07/15/2016] [Accepted: 07/18/2016] [Indexed: 11/19/2022]
Abstract
To estimate the health impact of bathing in urban river waters a two-step risk assessment was conducted using the example of the Ruhr River in North-Rhine Westphalia (Germany). The risk of acquiring gastrointestinal illness (GI) due to bathing in the Ruhr River was the focus of this analysis. Referring to the WHO guidelines for safe recreational water environments, risk was defined as the probability of occurrence x severity of harm. Thus, the probability of acquiring GI by bathing in the Ruhr River has been calculated by means of the quantitative microbial risk assessment (QMRA) method. Additionally to this, harm was operationalized by using the DALY metric, quantifying the impact of disability for public health. The calculation of the DALYs based on the QMRA results, disease and lethality data of the population, duration of diseases, disability weights and a demographic profile of a regionally determined potential bathing population. DALYs were calculated for norovirus gastroenteritis, rotavirus gastroenteritis, cryptosporidiosis and giardiasis. The calculated DALYs were set into relation to other risks of daily life. Furthermore the effect of age weighting and time discounting for this site-specific population was considered. The viral load caused the main part of the environmental burden of disease by bathing in the river. The calculated DALYs are significantly lower than DALYs for all cause GI in Germany, which reach 1.19 DALY/1000, or DALYs accepted for an official EG designated bathing water (2.579 DALYs/1000 persons) but on a comparable level with the DALY for drowning (0.26 DALY/1000 Persons). The DALY concept provides a complementary tool to the QMRA for evaluating and comparing health risks arising from a specific environment for a specific population and behaviour and for comparing with other health risks of daily life.
Collapse
Affiliation(s)
- Christian Timm
- IHPH-Institute for Hygiene and Public Health, GeoHealth Centre, University of Bonn, 53105 Bonn, Germany.
| | - Stephan Luther
- IHPH-Institute for Hygiene and Public Health, GeoHealth Centre, University of Bonn, 53105 Bonn, Germany
| | - Lars Jurzik
- Department for Hygiene, Social and Environmental Medicine, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Ibrahim Ahmed Hamza
- Environmental Virology Laboratory, Department of Water Pollution Research, National Research Centre, Dokki, Cairo, Egypt
| | - Thomas Kistemann
- IHPH-Institute for Hygiene and Public Health, GeoHealth Centre, University of Bonn, 53105 Bonn, Germany
| |
Collapse
|
42
|
Verbyla ME, Symonds EM, Kafle RC, Cairns MR, Iriarte M, Mercado Guzmán A, Coronado O, Breitbart M, Ledo C, Mihelcic JR. Managing Microbial Risks from Indirect Wastewater Reuse for Irrigation in Urbanizing Watersheds. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:6803-13. [PMID: 26992352 DOI: 10.1021/acs.est.5b05398] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Limited supply of clean water in urbanizing watersheds creates challenges for safely sustaining irrigated agriculture and global food security. On-farm interventions, such as riverbank filtration (RBF), are used in developing countries to treat irrigation water from rivers with extensive fecal contamination. Using a Bayesian approach incorporating ethnographic data and pathogen measurements, quantitative microbial risk assessment (QMRA) methods were employed to assess the impact of RBF on consumer health burdens for Giardia, Cryptosporidium, rotavirus, norovirus, and adenovirus infections resulting from indirect wastewater reuse, with lettuce irrigation in Bolivia as a model system. Concentrations of the microbial source tracking markers pepper mild mottle virus and HF183 Bacteroides were respectively 2.9 and 5.5 log10 units lower in RBF-treated water than in the river water. Consumption of lettuce irrigated with river water caused an estimated median health burden that represents 37% of Bolivia's overall diarrheal disease burden, but RBF resulted in an estimated health burden that is only 1.1% of this overall diarrheal disease burden. Variability and uncertainty associated with environmental and cultural factors affecting exposure correlated more with QMRA-predicted health outcomes than factors related to disease vulnerability. Policies governing simple on-farm interventions like RBF can be intermediary solutions for communities in urbanizing watersheds that currently lack wastewater treatment.
Collapse
Affiliation(s)
- Matthew E Verbyla
- Department of Civil & Environmental Engineering, University of South Florida , 4202 E. Fowler Avenue, Tampa, Florida 33620, United States
| | - Erin M Symonds
- College of Marine Science, University of South Florida , 140 Seventh Avenue South, St. Petersburg, Florida 33701, United States
| | - Ram C Kafle
- Department of Mathematics & Statistics, University of South Florida , 4202 E. Fowler Avenue, Tampa, Florida 33620, United States
| | - Maryann R Cairns
- Department of Anthropology, University of South Florida , 4202 E. Fowler Avenue, Tampa, Florida 33620, United States
| | - Mercedes Iriarte
- Center for Water and Environmental Sanitation (Centro de Aguas y Saneamiento Ambiental, CASA), Universidad Mayor de San Simon , Cochabamba, Bolivia
| | - Alvaro Mercado Guzmán
- Center for Water and Environmental Sanitation (Centro de Aguas y Saneamiento Ambiental, CASA), Universidad Mayor de San Simon , Cochabamba, Bolivia
| | - Olver Coronado
- Center for Water and Environmental Sanitation (Centro de Aguas y Saneamiento Ambiental, CASA), Universidad Mayor de San Simon , Cochabamba, Bolivia
| | - Mya Breitbart
- College of Marine Science, University of South Florida , 140 Seventh Avenue South, St. Petersburg, Florida 33701, United States
| | - Carmen Ledo
- Center for Urban Planning and Management (Centro de Planificación y Gestión, CePlaG), Universidad Mayor de San Simon , Cochabamba, Bolivia
| | - James R Mihelcic
- Department of Civil & Environmental Engineering, University of South Florida , 4202 E. Fowler Avenue, Tampa, Florida 33620, United States
| |
Collapse
|
43
|
Current Status of Marker Genes of Bacteroides and Related Taxa for Identifying Sewage Pollution in Environmental Waters. WATER 2016. [DOI: 10.3390/w8060231] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
44
|
Coliphages as Model Organisms in the Characterization and Management of Water Resources. WATER 2016. [DOI: 10.3390/w8050199] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
45
|
Abstract
This paper reviews the latest evidence provided by epidemiological studies and quantitative microbial risk assessments (QMRAs) of infection risk from recreational water use. Studies for review were selected following a PubMed search for articles published between January 2010 and April 2014. Epidemiological studies show a generally elevated risk of gastrointestinal illness in bathers compared to non-bathers but often no clear association with water quality as measured by faecal indicator bacteria; this is especially true where study sites are impacted by non-point source pollution. Evidence from QMRAs support the lack of a consistent water quality association for non-point source-impacted beaches. It is suggested that source attribution, through quantified microbial source apportionment, linked with appropriate use of microbial source tracking methods should be employed as an integral part of future epidemiological surveys.
Collapse
Affiliation(s)
- Lorna Fewtrell
- Centre for Research into Environment and Health (CREH), Department of Geography and Earth Sciences, Aberystwyth University, Ceredigion, SY23 3DB UK
| | - David Kay
- Centre for Research into Environment and Health (CREH), Department of Geography and Earth Sciences, Aberystwyth University, Ceredigion, SY23 3DB UK
| |
Collapse
|
46
|
La Sala LF, Redondo LM, Díaz Carrasco JM, Pereyra AM, Farber M, Jost H, Fernández-Miyakawa ME. Carriage of Clostridium perfringens by benthic crabs in a sewage-polluted estuary. MARINE POLLUTION BULLETIN 2015; 97:365-372. [PMID: 26130524 DOI: 10.1016/j.marpolbul.2015.05.066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 05/22/2015] [Accepted: 05/29/2015] [Indexed: 06/04/2023]
Abstract
The Estuary of Bahía Blanca (EBB), Argentina, is an important wetland under intense sewage pollution. We investigated the occurrence of Clostridium perfringens (CP) in populations of two benthic crabs (Neohelice granulata and Cyrtograpsus angulatus) and in sediment from the EBB. CP was found in 49.1% of the crabs and all of the isolates were identified as type A. The alpha (cpa) and enterotoxin (cpe) encoding genes were identified. Genetic analyses identified 13 novel sequence types, and found no clustering among isolates, suggesting that CP is not part of the crabs' commensal flora. CP carriage was 51 times more likely in crabs from the area nearest sewage outfalls compared with crabs from a reference site. Our in vitro experiments suggest that the carriage of CP in crabs is transient. The use of these benthic crabs as monitoring organisms of sewage pollution in coastal habitats is proposed.
Collapse
Affiliation(s)
- Luciano F La Sala
- GEKKO, Grupo de Estudios en Conservación y Manejo, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan 670, 8000 Bahía Blanca, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Rivadavia 1917, 1033 Ciudad Autónoma de Buenos Aires, Argentina.
| | - Leandro M Redondo
- Instituto de Patobiología, Centro Nacional de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria, Calle Las Cabañas y Los Reseros s/n, Casilla de Correo 25, 1712 Castelar, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Rivadavia 1917, 1033 Ciudad Autónoma de Buenos Aires, Argentina
| | - Juan M Díaz Carrasco
- Instituto de Patobiología, Centro Nacional de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria, Calle Las Cabañas y Los Reseros s/n, Casilla de Correo 25, 1712 Castelar, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Rivadavia 1917, 1033 Ciudad Autónoma de Buenos Aires, Argentina
| | - Ana María Pereyra
- Instituto de Patobiología, Centro Nacional de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria, Calle Las Cabañas y Los Reseros s/n, Casilla de Correo 25, 1712 Castelar, Buenos Aires, Argentina
| | - Marisa Farber
- Consejo Nacional de Investigaciones Científicas y Técnicas, Rivadavia 1917, 1033 Ciudad Autónoma de Buenos Aires, Argentina; Instituto de Biotecnología, Centro Nacional de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria, Calle Las Cabañas y Los Reseros s/n, Casilla de Correo 25, 1712 Castelar, Buenos Aires, Argentina
| | - Helen Jost
- Department of Veterinary Science and Microbiology, University of Arizona, Tucson, AZ 85721, USA
| | - Mariano E Fernández-Miyakawa
- Instituto de Patobiología, Centro Nacional de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria, Calle Las Cabañas y Los Reseros s/n, Casilla de Correo 25, 1712 Castelar, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Rivadavia 1917, 1033 Ciudad Autónoma de Buenos Aires, Argentina
| |
Collapse
|
47
|
Lim KY, Hamilton AJ, Jiang SC. Assessment of public health risk associated with viral contamination in harvested urban stormwater for domestic applications. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 523:95-108. [PMID: 25863500 DOI: 10.1016/j.scitotenv.2015.03.077] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 03/18/2015] [Accepted: 03/18/2015] [Indexed: 04/14/2023]
Abstract
Capturing stormwater is becoming a new standard for sustainable urban stormwater management, which can be used to supplement water supply portfolios in water-stressed cities. The key advantage of harvesting stormwater is to use low impact development (LID) systems for treatment to meet water quality requirement for non-potable uses. However, the lack of scientific studies to validate the safety of such practice has limited its adoption. Microbial hazards in stormwater, especially human viruses, represent the primary public health threat. Using adenovirus and norovirus as target pathogens, we investigated the viral health risk associated with a generic scenario of urban stormwater harvesting practice and its application for three non-potable uses: 1) toilet flushing, 2) showering, and 3) food-crop irrigation. The Quantitative Microbial Risk Assessment (QMRA) results showed that food-crop irrigation has the highest annual viral infection risk (median range: 6.8×10(-4)-9.7×10(-1) per-person-per-year or pppy), followed by showering (3.6×10(-7)-4.3×10(-2)pppy), and toilet flushing (1.1×10(-7)-1.3×10(-4)pppy). Disease burden of each stormwater use was ranked in the same order as its viral infection risk: food-crop irrigation>showering>toilet flushing. The median and 95th percentile risk values of toilet-flushing using treated stormwater are below U.S. EPA annual risk benchmark of ≤10(-4)pppy, whereas the disease burdens of both toilet-flushing and showering are within the WHO recommended disease burdens of ≤10(-6)DALYspppy. However, the acceptability of showering risk interpreted based on the U.S. EPA and WHO benchmarks is in disagreement. These results confirm the safety of stormwater application in toilet flushing, but call for further research to fill the data gaps in risk modeling as well as risk benchmarks.
Collapse
Affiliation(s)
- Keah-Ying Lim
- Department of Civil and Environmental Engineering, University of California, Irvine, CA 92617-2175, USA
| | - Andrew J Hamilton
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Dookie Campus, Currawa, VIC 3647, Australia; Federation University Australia, Mt Helen Campus, VIC 3353, Australia
| | - Sunny C Jiang
- Department of Civil and Environmental Engineering, University of California, Irvine, CA 92617-2175, USA.
| |
Collapse
|
48
|
U.S. Recreational Water Quality Criteria: A Vision for the Future. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:7752-76. [PMID: 26184253 PMCID: PMC4515689 DOI: 10.3390/ijerph120707752] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 06/18/2015] [Accepted: 07/01/2015] [Indexed: 12/21/2022]
Abstract
This manuscript evaluates the U.S. Recreational Water Quality Criteria (RWQC) of 2012, based upon discussions during a conference held 11-13 March 2013, in Honolulu, Hawaii. The RWQC of 2012 did not meet expectations among the research community because key recommended studies were not completed, new data to assess risks to bathers exposed to non-point sources of fecal indicator bacteria (FIB) were not developed, and the 2012 RWQC did not show marked improvements in strategies for assessing health risks for bathers using all types of recreational waters. The development of the 2012 RWQC was limited in scope because the epidemiologic studies at beach sites were restricted to beaches with point sources of pollution and water samples were monitored for only enterococci. The vision for the future is development of effective RWQC guidelines based on epidemiologic and quantitative microbial risk assessment (QMRA) studies for sewage specific markers, as well as human enteric pathogens so that health risks for bathers at all recreational waters can be determined. The 2012 RWQC introduced a program for states and tribes to develop site-specific water quality criteria, and in theory this approach can be used to address the limitations associated with the measurements of the traditional FIB.
Collapse
|
49
|
Mattioli MCM, Davis J, Mrisho M, Boehm AB. Quantification of Human Norovirus GII on Hands of Mothers with Children Under the Age of Five Years in Bagamoyo, Tanzania. Am J Trop Med Hyg 2015; 93:478-84. [PMID: 26149861 DOI: 10.4269/ajtmh.14-0778] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 05/27/2015] [Indexed: 11/07/2022] Open
Abstract
Human noroviruses are the most common cause of viral gastroenteritis worldwide and one of the leading causes of viral diarrhea in children under the age of 5 years. Hands have been shown to play an important role in norovirus transmission. Norovirus outbreaks tend to exhibit strong seasonality, most often occurring during cold, dry months, but recently have also been documented during hot, dry winter months in the southern hemisphere. Other research suggests that rainfall is an important factor in norovirus outbreaks. This study examines the prevalence and concentration of human norovirus GII on the hands of mothers in Bagamoyo, Tanzania, during the rainy and dry seasons. Norovirus GII was detected in approximately 5% of hand rinse samples during both the rainy and dry seasons. Fecal indicator bacteria levels, Escherichia coli and enterococci, in hand rinse samples were not associated with norovirus hand contamination. Turbidity of the hand rinses was found to be associated with norovirus presence on mothers' hands; however, this relationship was only observed during the rainy season. The results suggest mothers' hands serve as a source of norovirus exposure for young children in Tanzanian households, and further work is needed to determine better indicators of norovirus contamination in these environments.
Collapse
Affiliation(s)
- Mia Catharine M Mattioli
- Environmental and Water Studies, Department of Civil and Environmental Engineering, Stanford University, Stanford, California; Woods Institute for the Environment, Stanford University, Stanford, California; Bagamoyo Research and Training Unit, Ifakara Health Institute, Bagamoyo, Tanzania
| | - Jennifer Davis
- Environmental and Water Studies, Department of Civil and Environmental Engineering, Stanford University, Stanford, California; Woods Institute for the Environment, Stanford University, Stanford, California; Bagamoyo Research and Training Unit, Ifakara Health Institute, Bagamoyo, Tanzania
| | - Mwifadhi Mrisho
- Environmental and Water Studies, Department of Civil and Environmental Engineering, Stanford University, Stanford, California; Woods Institute for the Environment, Stanford University, Stanford, California; Bagamoyo Research and Training Unit, Ifakara Health Institute, Bagamoyo, Tanzania
| | - Alexandria B Boehm
- Environmental and Water Studies, Department of Civil and Environmental Engineering, Stanford University, Stanford, California; Woods Institute for the Environment, Stanford University, Stanford, California; Bagamoyo Research and Training Unit, Ifakara Health Institute, Bagamoyo, Tanzania
| |
Collapse
|
50
|
Bambic DG, Kildare-Hann BJ, Rajal VB, Sturm BSM, Minton CB, Schriewer A, Wuertz S. Spatial and hydrologic variation of Bacteroidales, adenovirus and enterovirus in a semi-arid, wastewater effluent-impacted watershed. WATER RESEARCH 2015; 75:83-94. [PMID: 25765167 DOI: 10.1016/j.watres.2015.02.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2014] [Revised: 02/08/2015] [Accepted: 02/10/2015] [Indexed: 06/04/2023]
Abstract
Bacteroidales and viruses were contemporaneously measured during dry and wet weather conditions at a watershed-scale in a semi-arid watershed impacted by a mixture of agricultural runoff, municipal wastewater effluent and municipal runoff. The results highlight the presence of municipal wastewater effluent as a confounding factor for microbial source tracking (MST) studies, and thus data were segregated into groups based on whether they were impacted by wastewater effluent. In semi-arid environments such as the Calleguas Creek watershed, located in southern California, the relative contribution of municipal wastewater effluent is dependent on hydrology as storm events lead to conditions where agricultural and municipal stormwater dominate receiving waters (rather than municipal wastewater, which is the case during dry weather). As such, the approach to data segregation was dependent on hydrology/storm conditions. Storm events led to significant increases in ruminant- and dog-associated Bacteroidales concentrations, indicating that overland transport connects strong non-human fecal sources with surface waters. Because the dataset had a large number of non-detect samples, data handling included the Kaplan-Meir estimator and data were presented graphically in a manner that reflects the potential effect of detection limits. In surface water samples with virus detections, Escherichia coli concentrations were often below (in compliance with) the recreational water quality criteria. In fact, sites downstream of direct inputs of municipal wastewater effluent exhibited the lowest concentrations of E. coli, but the highest concentrations of human-associated Bacteroidales and highest detection rates of human viruses. The toolkit, comprised of the four Bacteroidales assays and human virus assays used, can be successfully applied to inform watershed managers seeking to comply with recreational water quality criteria. However, care should be taken when analyzing data to account for the effect of non-detect samples, sources with differing microbial viability, and diverging hydrologic conditions.
Collapse
Affiliation(s)
- Dustin G Bambic
- Department of Civil and Environmental Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA; Larry Walker Associates, 707 Fourth Street Suite 200, Davis, CA 95616, USA
| | - Beverly J Kildare-Hann
- Department of Civil and Environmental Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Veronica B Rajal
- Department of Civil and Environmental Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Belinda S M Sturm
- Department of Civil and Environmental Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Chris B Minton
- Larry Walker Associates, 707 Fourth Street Suite 200, Davis, CA 95616, USA
| | - Alexander Schriewer
- Department of Civil and Environmental Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Stefan Wuertz
- Department of Civil and Environmental Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA; Singapore Centre on Environmental Life Sciences Engineering (SCELSE) and School of Civil and Environmental Engineering, Nanyang Technological University, 60 Nanyang Drive, 637551, Singapore.
| |
Collapse
|