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Dlamini M, Msolo L, Ehi Ebomah K, Nontongana N, Ifeanyi Okoh A. A systematic review on the incidence of influenza viruses in wastewater matrices: Implications for public health. PLoS One 2024; 19:e0291900. [PMID: 38662758 PMCID: PMC11045120 DOI: 10.1371/journal.pone.0291900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 03/05/2024] [Indexed: 04/28/2024] Open
Abstract
Influenza viruses pose a significant public health threat, necessitating comprehensive surveillance strategies to enhance early detection and preventive measures. This systematic review investigates the incidence of influenza viruses in wastewater matrices, aiming to elucidate the potential implications for public health. The study synthesizes existing literature, employing rigorous inclusion criteria to identify relevant studies conducted globally. The essence of the problem lies in the gaps of traditional surveillance methods, which often rely on clinical data and may underestimate the true prevalence of influenza within communities. Wastewater-based epidemiology offers a novel approach to supplementing these conventional methods, providing a broader and more representative assessment of viral circulation. This review systematically examines the methodologies employed in the selected studies, including virus concentration techniques and molecular detection methods, to establish a standardized framework for future research. Our findings reveal a consistent presence of influenza viruses in diverse wastewater matrices across different geographic locations and seasons. Recommendations for future research include the standardization of sampling protocols, improvement of virus concentration methods, and the integration of wastewater surveillance into existing public health frameworks. In conclusion, this systematic review contributes to the understanding of influenza dynamics in wastewater matrices, offering valuable insights for public health practitioners and policymakers. Implementation of wastewater surveillance alongside traditional methods can enhance the resilience of public health systems and better prepare communities for the challenges posed by influenza outbreaks.
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Affiliation(s)
- Mbasa Dlamini
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
- Department of Biochemistry and Microbiology, Applied and Environmental Microbiology Research Group (AEMREG), University of Fort Hare, Alice, South Africa
| | - Luyanda Msolo
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
- Department of Biochemistry and Microbiology, Applied and Environmental Microbiology Research Group (AEMREG), University of Fort Hare, Alice, South Africa
| | - Kingsley Ehi Ebomah
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
- Department of Biochemistry and Microbiology, Applied and Environmental Microbiology Research Group (AEMREG), University of Fort Hare, Alice, South Africa
| | - Nolonwabo Nontongana
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
- Department of Biochemistry and Microbiology, Applied and Environmental Microbiology Research Group (AEMREG), University of Fort Hare, Alice, South Africa
| | - Anthony Ifeanyi Okoh
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
- Department of Biochemistry and Microbiology, Applied and Environmental Microbiology Research Group (AEMREG), University of Fort Hare, Alice, South Africa
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Chen Y, Hou W, Hou W, Dong J. Lagging effects and prediction of pollutants and their interaction modifiers on influenza in northeastern China. BMC Public Health 2023; 23:1826. [PMID: 37726705 PMCID: PMC10510220 DOI: 10.1186/s12889-023-16712-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 09/06/2023] [Indexed: 09/21/2023] Open
Abstract
BACKGROUND Previous studies have typically explored the daily lagged relations between influenza and meteorology, but few have explored seasonally the monthly lagged relationship, interaction and multiple prediction between influenza and pollution. Our specific objectives are to evaluate the lagged and interaction effects of pollution factors and construct models for estimating influenza incidence in a hierarchical manner. METHODS Our researchers collect influenza case data from 2005 to 2018 with meteorological and contaminative factors in Northeast China. We develop a generalized additive model with up to 6 months of maximum lag to analyze the impact of pollution factors on influenza cases and their interaction effects. We employ LASSO regression to identify the most significant environmental factors and conduct multiple complex regression analysis. In addition, quantile regression is taken to model the relation between influenza morbidity and specific percentiles (or quantiles) of meteorological factors. RESULTS The influenza epidemic in Northeast China has shown an upward trend year by year. The excessive incidence of influenza in Northeast China may be attributed to the suspected primary air pollutant, NO2, which has been observed to have overall low levels during January, March, and June. The Age 15-24 group shows an increase in the relative risk of influenza with an increase in PM2.5 concentration, with a lag of 0-6 months (ERR 1.08, 95% CI 0.10-2.07). In the quantitative analysis of the interaction model, PM10 at the level of 100-120 μg/m3, PM2.5 at the level of 60-80 μg/m3, and NO2 at the level of 60 μg/m3 or more have the greatest effect on the onset of influenza. The GPR model behaves better among prediction models. CONCLUSIONS Exposure to the air pollutant NO2 is associated with an increased risk of influenza with a cumulative lag effect. Prioritizing winter and spring pollution monitoring and influenza prediction modeling should be our focus.
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Affiliation(s)
- Ye Chen
- Department of Infectious Disease, Shenyang Center for Disease Control and Prevention, 110100, Shenyang, Liaoning Province, People's Republic of China
- Shenyang Natural Focal Diseases Clinical Medical Research Center, 110100, Shenyang, Liaoning Province, People's Republic of China
| | - Weiming Hou
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, 110122, Shenyang, People's Republic of China
| | - Weiyu Hou
- The First Hospital of Shanxi Medical University, No.85 Jiefang South Road, 030012, Taiyuan, People's Republic of China
| | - Jing Dong
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, 110122, Shenyang, People's Republic of China.
- Key Laboratory of Environmental Stress and Chronic Disease Control & Prevention (China Medical University), Ministry of Education, No.77 Puhe Road, 110122, Shenyang, People's Republic of China.
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Ahrens AK, Selinka HC, Wylezich C, Wonnemann H, Sindt O, Hellmer HH, Pfaff F, Höper D, Mettenleiter TC, Beer M, Harder TC. Investigating Environmental Matrices for Use in Avian Influenza Virus Surveillance-Surface Water, Sediments, and Avian Fecal Samples. Microbiol Spectr 2023; 11:e0266422. [PMID: 36700688 PMCID: PMC10100768 DOI: 10.1128/spectrum.02664-22] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 12/19/2022] [Indexed: 01/27/2023] Open
Abstract
Surveillance of avian influenza viruses (AIV) in wild water bird populations is important for early warning to protect poultry from incursions of high-pathogenicity (HP) AIV. Access to individual water birds is difficult and restricted and limits sampling depth. Here, we focused on environmental samples such as surface water, sediments, and environmentally deposited fresh avian feces as matrices for AIV detection. Enrichment of viral particles by ultrafiltration of 10-L surface water samples using Rexeed-25-A devices was validated using a bacteriophage ϕ6 internal control system, and AIV detection was attempted using real-time RT-PCR and virus isolation. While validation runs suggested an average enrichment of about 60-fold, lower values of 10 to 15 were observed for field water samples. In total 25/36 (60%) of water samples and 18/36 (50%) of corresponding sediment samples tested AIV positive. Samples were obtained from shallow water bodies in habitats with large numbers of waterfowl during an HPAIV epizootic. Although AIV RNA was detected in a substantial percentage of samples virus isolation failed. Virus loads in samples often were too low to allow further sub- and pathotyping. Similar results were obtained with environmentally deposited avian feces. Moreover, the spectrum of viruses detected by these active surveillance methods did not fully mirror an ongoing HPAIV epizootic among waterfowl as detected by passive surveillance, which, in terms of sensitivity, remains unsurpassed. IMPORTANCE Avian influenza viruses (AIV) have a wide host range in the avian metapopulation and, occasionally, transmission to humans also occurs. Surface water plays a particularly important role in the epidemiology of AIV, as the natural virus reservoir is found in aquatic wild birds. Environmental matrices comprising surface water, sediments, and avian fecal matter deposited in the environment were examined for their usefulness in AIV surveillance. Despite virus enrichment efforts, environmental samples regularly revealed very low virus loads, which hampered further sub- and pathotyping. Passive surveillance based on oral and cloacal swabs of diseased and dead wild birds remained unsurpassed with respect to sensitivity.
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Affiliation(s)
- Ann Kathrin Ahrens
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald-Isle of Riems, Germany
| | | | - Claudia Wylezich
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald-Isle of Riems, Germany
| | | | - Ole Sindt
- State Laboratory of Schleswig-Holstein, Neumuenster, Germany
| | - Hartmut H. Hellmer
- Climate Sciences, Physical Oceanography of the Polar Seas, Alfred Wegener Institute, Bremerhaven, Germany
| | - Florian Pfaff
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald-Isle of Riems, Germany
| | - Dirk Höper
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald-Isle of Riems, Germany
| | | | - Martin Beer
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald-Isle of Riems, Germany
| | - Timm C. Harder
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald-Isle of Riems, Germany
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Ahrens AK, Selinka HC, Mettenleiter TC, Beer M, Harder TC. Exploring surface water as a transmission medium of avian influenza viruses - systematic infection studies in mallards. Emerg Microbes Infect 2022; 11:1250-1261. [PMID: 35473641 PMCID: PMC9090351 DOI: 10.1080/22221751.2022.2065937] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Mallards (Anas platyrhynchos) are an abundant anseriform migratory wild bird species worldwide and an important reservoir for the maintenance of low pathogenicity (LP) avian influenza viruses (AIV). They have also been implicated in the spread of high pathogenicity (HP) AIV after spill-over events from HPAIV-infected poultry. The spread of HPAIV within wild water bird populations may lead to viral contamination of natural habitats. The role of small shallow water bodies as a transmission medium of AIV among mallards is investigated here in three experimental settings. (i) Delayed onset but rapid progression of infection seeded by two mallards inoculated with either LP or HP AIV to each eight sentinel mallards was observed in groups with access to a small 100 L water pool. In contrast, groups with a bell drinker as the sole source of drinking water showed a rapid onset but lengthened course of infection. (ii) HPAIV infection also set off when virus was dispersed in the water pool; titres as low as 102 TCID50 L-1 (translating to 0.1 TCID50 mL-1) proved to be sufficient. (iii) Substantial loads of viral RNA (and infectivity) were also found on the surface of the birds' breast plumage. "Unloading" of virus infectivity from contaminated plumage into water bodies may be an efficient mechanism of virus spread by infected mallards. However, transposure of HPAIV via the plumage of an uninfected mallard failed. We conclude, surface water in small shallow water bodies may play an important role as a mediator of AIV infection of aquatic wild birds.
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Affiliation(s)
- Ann Kathrin Ahrens
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institute, Isle of Riems, Germany
| | | | | | - Martin Beer
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institute, Isle of Riems, Germany
| | - Timm C Harder
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institute, Isle of Riems, Germany
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Hood G, Roche X, Brioudes A, von Dobschuetz S, Fasina FO, Kalpravidh W, Makonnen Y, Lubroth J, Sims L. A literature review of the use of environmental sampling in the surveillance of avian influenza viruses. Transbound Emerg Dis 2021; 68:110-126. [PMID: 32652790 PMCID: PMC8048529 DOI: 10.1111/tbed.13633] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 05/07/2020] [Accepted: 05/13/2020] [Indexed: 02/05/2023]
Abstract
This literature review provides an overview of use of environmental samples (ES) such as faeces, water, air, mud and swabs of surfaces in avian influenza (AI) surveillance programs, focussing on effectiveness, advantages and gaps in knowledge. ES have been used effectively for AI surveillance since the 1970s. Results from ES have enhanced understanding of the biology of AI viruses in wild birds and in markets, of links between human and avian influenza, provided early warning of viral incursions, allowed assessment of effectiveness of control and preventive measures, and assisted epidemiological studies in outbreaks, both avian and human. Variation exists in the methods and protocols used, and no internationally recognized guidelines exist on the use of ES and data management. Few studies have performed direct comparisons of ES versus live bird samples (LBS). Results reported so far demonstrate reliance on ES will not be sufficient to detect virus in all cases when it is present, especially when the prevalence of infection/contamination is low. Multiple sample types should be collected. In live bird markets, ES from processing/selling areas are more likely to test positive than samples from bird holding areas. When compared to LBS, ES is considered a cost-effective, simple, rapid, flexible, convenient and acceptable way of achieving surveillance objectives. As a non-invasive technique, it can minimize effects on animal welfare and trade in markets and reduce impacts on wild bird communities. Some limitations of environmental sampling methods have been identified, such as the loss of species-specific or information on the source of virus, and taxonomic-level analyses, unless additional methods are applied. Some studies employing ES have not provided detailed methods. In others, where ES and LBS are collected from the same site, positive results have not been assigned to specific sample types. These gaps should be remedied in future studies.
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Affiliation(s)
- Grace Hood
- Food and Agriculture Organization of the United NationsRomeItaly
| | - Xavier Roche
- Food and Agriculture Organization of the United NationsRomeItaly
| | - Aurélie Brioudes
- Food and Agriculture Organization of the United NationsRegional Office for Asia and the PacificBangkokThailand
| | | | | | | | - Yilma Makonnen
- Food and Agriculture Organization of the United Nations, Sub-Regional Office for Eastern AfricaAddis AbabaEthiopia
| | - Juan Lubroth
- Food and Agriculture Organization of the United NationsRomeItaly
| | - Leslie Sims
- Asia Pacific Veterinary Information ServicesMelbourneAustralia
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Rusiñol M, Martínez-Puchol S, Forés E, Itarte M, Girones R, Bofill-Mas S. Concentration methods for the quantification of coronavirus and other potentially pandemic enveloped virus from wastewater. CURRENT OPINION IN ENVIRONMENTAL SCIENCE & HEALTH 2020; 17:21-28. [PMID: 32839746 PMCID: PMC7437508 DOI: 10.1016/j.coesh.2020.08.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
As the novel SARS-CoV-2 was detected in faeces, environmental researchers have been using centrifugal ultrafiltration, polyethylene glycol precipitation and aluminium hydroxide flocculation to describe its presence in wastewater samples. High recoveries (up to 65%) are described with electronegative filtration when using surrogate viruses, but few literature reports recovery efficiencies using accurate quantification of enveloped viruses. Considering that every single virus will have a different behaviour during viral concentration, it is recommended to use an enveloped virus, and if possible, a betacoronaviruses as murine hepatitis virus, as a surrogate. In this review, we show new data from a newly available technology that provides a quick ultrafiltration protocol for SARS-CoV-2. Wastewater surveillance is an efficient system for the evaluation of the relative prevalence of SARS-CoV-2 infections in a community, and there is the need of using reliable concentration methods for an accurate and sensitive quantification of the virus in water.
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Affiliation(s)
- Marta Rusiñol
- Section of Microbiology, Virology and Biotechnology, Department of Genetics, Microbiology and Statistics. Faculty of Biology, University of Barcelona, Catalonia, Spain
- GHS, Institute of Environmental Assessment & Water Research (IDAEA), CSIC, Barcelona, Spain
| | - Sandra Martínez-Puchol
- Section of Microbiology, Virology and Biotechnology, Department of Genetics, Microbiology and Statistics. Faculty of Biology, University of Barcelona, Catalonia, Spain
- The Water Institute of the University of Barcelona, Spain
| | - Eva Forés
- Section of Microbiology, Virology and Biotechnology, Department of Genetics, Microbiology and Statistics. Faculty of Biology, University of Barcelona, Catalonia, Spain
- The Water Institute of the University of Barcelona, Spain
| | - Marta Itarte
- Section of Microbiology, Virology and Biotechnology, Department of Genetics, Microbiology and Statistics. Faculty of Biology, University of Barcelona, Catalonia, Spain
- The Water Institute of the University of Barcelona, Spain
| | - Rosina Girones
- Section of Microbiology, Virology and Biotechnology, Department of Genetics, Microbiology and Statistics. Faculty of Biology, University of Barcelona, Catalonia, Spain
- The Water Institute of the University of Barcelona, Spain
| | - Sílvia Bofill-Mas
- Section of Microbiology, Virology and Biotechnology, Department of Genetics, Microbiology and Statistics. Faculty of Biology, University of Barcelona, Catalonia, Spain
- The Water Institute of the University of Barcelona, Spain
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7
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McCuen MM, Pitesky ME, Buler JJ, Acosta S, Wilcox AH, Bond RF, Díaz-Muñoz SL. A comparison of amplification methods to detect Avian Influenza viruses in California wetlands targeted via remote sensing of waterfowl. Transbound Emerg Dis 2020; 68:98-109. [PMID: 32592444 PMCID: PMC8048853 DOI: 10.1111/tbed.13612] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 04/25/2020] [Accepted: 04/26/2020] [Indexed: 12/14/2022]
Abstract
Migratory waterfowl, including geese and ducks, are indicated as the primary reservoir of avian influenza viruses (AIv) which can be subsequently spread to commercial poultry. The US Department of Agriculture's (USDA) surveillance efforts of waterfowl for AIv have been largely discontinued in the contiguous United States. Consequently, the use of technologies to identify areas of high waterfowl density and detect the presence of AIv in habitat such as wetlands has become imperative. Here we identified two high waterfowl density areas in California using processed NEXt generation RADar (NEXRAD) and collected water samples to test the efficacy of two tangential flow ultrafiltration methods and two nucleic acid based AIv detection assays. Whole-segment amplification and long-read sequencing yielded more positive samples than standard M-segment qPCR methods (57.6% versus 3.0%, p < .0001). We determined that this difference in positivity was due to mismatches in published primers to our samples and that these mismatches would result in failing to detect in the vast majority of currently sequenced AIv genomes in public databases. The whole segment sequences were subsequently used to provide subtype and potential host information of the AIv environmental reservoir. There was no statistically significant difference in sequencing reads recovered from the RexeedTM filtration compared to the unfiltered surface water. This overall approach combining remote sensing, filtration and sequencing provides a novel and potentially more effective, surveillance approach for AIv.
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Affiliation(s)
- Madeline M McCuen
- Department of Population Health and Reproduction, School of Veterinary Medicine-Cooperative Extension, University of California, Davis, CA, USA
| | - Maurice E Pitesky
- Department of Population Health and Reproduction, School of Veterinary Medicine-Cooperative Extension, University of California, Davis, CA, USA
| | - Jeffrey J Buler
- Department of Entomology and Wildlife Ecology, University of Delaware, Newark, DE, USA
| | - Sarai Acosta
- Department of Population Health and Reproduction, School of Veterinary Medicine-Cooperative Extension, University of California, Davis, CA, USA
| | - Alexander H Wilcox
- Department of Microbiology and Molecular Genetics, University of California, Davis, CA, USA
| | - Ronald F Bond
- Western Institute for Food Safety and Security, School of Veterinary Medicine, University of California, Davis, CA, USA
| | - Samuel L Díaz-Muñoz
- Department of Microbiology and Molecular Genetics, University of California, Davis, CA, USA.,Genome Center, University of California, Davis, CA, USA
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Germeraad EA, Elbers ARW, de Bruijn ND, Heutink R, van Voorst W, Hakze-van der Honing R, Bergervoet SA, Engelsma MY, van der Poel WHM, Beerens N. Detection of Low Pathogenic Avian Influenza Virus Subtype H10N7 in Poultry and Environmental Water Samples During a Clinical Outbreak in Commercial Free-Range Layers, Netherlands 2017. Front Vet Sci 2020; 7:237. [PMID: 32478107 PMCID: PMC7232570 DOI: 10.3389/fvets.2020.00237] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 04/07/2020] [Indexed: 11/23/2022] Open
Abstract
Wild birds are the natural reservoir of the avian influenza virus (AIV) and may transmit AIV to poultry via direct contact or indirectly through the environment. In the Netherlands, a clinically suspected free-range layer flock was reported to the veterinary authorities by the farmer. Increased mortality, a decreased feed intake, and a drop in egg production were observed. Subsequently, an infection with low pathogenic avian influenza virus was detected. This study describes the diagnostic procedures used for detection and subtyping of the virus. In addition to routine diagnostics, the potential of two different environmental diagnostic methods was investigated for detecting AIV in surface water. AIV was first detected using rRT-PCR and isolated from tracheal and cloacal swabs collected from the hens. The virus was subtyped as H10N7. Antibodies against the virus were detected in 28 of the 31 sera tested. An intravenous pathogenicity index (IVPI) experiment was performed, but no clinical signs (IVPI = 0) were observed. Post-mortem examination and histology confirmed the AIV infection. Multiple water samples were collected longitudinally from the free-range area and waterway near the farm. Both environmental diagnostic methods allowed the detection of the H10N7 virus, demonstrating the potential of these methods in detection of AIV. The described methods could be a useful additional procedure for AIV surveillance in water-rich areas with large concentrations of wild birds or in areas around poultry farms. In addition, these methods could be used as a tool to test if the environment or free-range area is virus-free again, at the end of an AIV epidemic.
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Affiliation(s)
- Evelien A. Germeraad
- Wageningen Bioveterinary Research, Department of Virology, Lelystad, Netherlands
| | - Armin R. W. Elbers
- Wageningen Bioveterinary Research, Department of Bacteriology and Epidemiology, Lelystad, Netherlands
| | | | - Rene Heutink
- Wageningen Bioveterinary Research, Department of Virology, Lelystad, Netherlands
| | - Wendy van Voorst
- Wageningen Bioveterinary Research, Department of Virology, Lelystad, Netherlands
- Poultry Department, GD-Animal Health, Deventer, Netherlands
| | | | - Saskia A. Bergervoet
- Wageningen Bioveterinary Research, Department of Virology, Lelystad, Netherlands
| | - Marc Y. Engelsma
- Wageningen Bioveterinary Research, Department of Virology, Lelystad, Netherlands
| | | | - Nancy Beerens
- Wageningen Bioveterinary Research, Department of Virology, Lelystad, Netherlands
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Pawar SD, Keng SS, Tare DS, Thormothe AL, Sapkal GN, Anukumar B, Lole KS, Mullick J, Mourya DT. A virus precipitation method for concentration & detection of avian influenza viruses from environmental water resources & its possible application in outbreak investigations. Indian J Med Res 2020; 150:612-619. [PMID: 32048625 PMCID: PMC7038801 DOI: 10.4103/ijmr.ijmr_1697_18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Background & objectives Avian influenza (AI) viruses have been a major cause of public health concern. Wild migratory birds and contaminated environmental sources such as waterbodies soiled with bird droppings play a significant role in the transmission of AI viruses. The objective of the present study was to develop a sensitive and user-friendly method for the concentration and detection of AI viruses from environmental water sources. Methods Municipal potable water, surface water from reservoirs and sea were spiked with low pathogenic AI viruses. To concentrate the viruses by precipitation, a combination of potassium aluminium sulphate with milk powder was used. Real-time reverse transcription-polymerase chain reaction was performed for virus detection, and the results were compared with a virus concentration method using erythrocytes. Drinking water specimens from poultry markets were also tested for the presence of AI viruses. Results A minimum of 101.0 EID50(50% egg infectious dose)/ml spiked H5N1 and 101.7 EID50/ml spiked H9N2 viruses were detected from spiked potable water; 101.0 and 102.0 EID50/ml spiked H5N1 virus was detected from surface water and seawater samples, respectively. The present method was more sensitive than the erythrocyte-binding method as approximately 10-fold higher infectious virus titres were obtained. AI H9N2 viruses were detected and isolated from water from local poultry markets, using this method. Interpretation & conclusions Viability and recovery of the spiked viruses were not affected by precipitation. The present method may be suitable for the detection of AI viruses from different environmental water sources and can also be applied during outbreak investigations.
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Affiliation(s)
- Shailesh D Pawar
- ICMR-National Institute of Virology-Mumbai Unit (Formerly Enterovirus Research Center), Mumbai, Maharashtra, India
| | - Sachin S Keng
- Avian Influenza Group, ICMR-National Institute of Virology-Microbial Containment Complex, Pune, Maharashtra, India
| | - Deeksha S Tare
- Avian Influenza Group, ICMR-National Institute of Virology-Microbial Containment Complex, Pune, Maharashtra, India
| | - Anil L Thormothe
- Avian Influenza Group, ICMR-National Institute of Virology-Microbial Containment Complex, Pune, Maharashtra, India
| | - Gajanan N Sapkal
- Diagnostic Virology Group, ICMR-National Institute of Virology-Microbial Containment Complex, Pune, Maharashtra, India
| | - B Anukumar
- ICMR-National Institute of Virology-Kerala Unit, Government TD Medical College Hospital, Alappuzha, Kerala, India
| | - Kavita S Lole
- Hepatitis Group, ICMR-National Institute of Virology-Microbial Containment Complex, Pune, Maharashtra, India
| | - Jayati Mullick
- Avian Influenza Group, ICMR-National Institute of Virology-Microbial Containment Complex, Pune, Maharashtra, India
| | - Devendra T Mourya
- ICMR-National Institute of Virology-Microbial Containment Complex, Pune, Maharashtra, India
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