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Oh C, Zheng G, Samineni L, Kumar M, Nguyen TH. Effective Removal of Enteric Viruses by Moringa oleifera Seed Extract Functionalized Cotton Filter. ACS ES&T WATER 2024; 4:3320-3331. [DOI: 10.1021/acsestwater.4c00194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2025]
Affiliation(s)
- Chamteut Oh
- Department of Civil and Environmental Engineering, University of Illinois Urbana−Champaign, 205 N. Mathews Ave, Urbana, Illinois 61801, United States
- Department of Environmental Engineering Sciences, University of Florida, 1128 Center Dr, Gainesville, Florida 32611, United States
| | - Gang Zheng
- Department of Civil and Environmental Engineering, University of Illinois Urbana−Champaign, 205 N. Mathews Ave, Urbana, Illinois 61801, United States
| | - Laxmicharan Samineni
- Department of Chemical Engineering, The University of Texas at Austin, 200 E. Dean Keeton St, Austin, Texas 78712, United States
| | - Manish Kumar
- Department of Chemical Engineering, The University of Texas at Austin, 200 E. Dean Keeton St, Austin, Texas 78712, United States
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, 301E E Dean Keeton St c1700, Austin, Texas 78712, United States
| | - Thanh H. Nguyen
- Department of Civil and Environmental Engineering, University of Illinois Urbana−Champaign, 205 N. Mathews Ave, Urbana, Illinois 61801, United States
- Institute of Genomic Biology, University of Illinois Urbana−Champaign, 1206 W. Gregory Dr, Urbana, Illinois 61801, United States
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Uprety S, Ngo I, Maggos M, Dangol B, Sherchan SP, Shisler JL, Amarasiri M, Sano D, Nguyen TH. Multiple pathogen contamination of water, hands, and fomites in rural Nepal and the effect of WaSH interventions. Int J Hyg Environ Health 2024; 257:114341. [PMID: 38442666 DOI: 10.1016/j.ijheh.2024.114341] [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: 11/03/2023] [Revised: 01/23/2024] [Accepted: 02/16/2024] [Indexed: 03/07/2024]
Abstract
Water, Sanitation, and Hygiene (WaSH) interventions are the most effective in reducing diarrheal disease severity and prevalence. However, very few studies have investigated the effectiveness of WaSH intervention in reducing pathogen presence and concentration. In this study, we employed a microfluidic PCR approach to quantify twenty bacterial pathogens in water (n = 360), hands (n = 180), and fomite (n = 540) samples collected in rural households of Nepal to assess the pathogen exposures and the effect of WaSH intervention on contamination and exposure rates. The pathogen load and the exposure pathways for each pathogen in intervention and control villages were compared to understand the effects of WaSH intervention. Pathogens were detected in higher frequency and concentration from fomites samples, toilet handle (21.42%; 5.4,0 95%CI: mean log10 of 4.69, 5.96), utensils (23.5%; 5.47, 95%CI: mean log10 of 4.77, 6.77), and water vessels (22.42%; 5.53, 95%CI: mean log10 of 4.79, 6.60) as compared to cleaning water (14.36%; 5.05, 95%CI: mean log10 of 4.36, 5.89), drinking water (14.26%; 4.37, 85%CI: mean log10 of 4.37, 5.87), and hand rinse samples (16.92%; 5.49, 95%CI: mean log10 of 4.77, 6.39). There was no clear evidence that WaSH intervention reduced overall pathogen contamination in any tested pathway. However, we observed a significant reduction (p < 0.05) in the prevalence, but not concentration, of some target pathogens, including Enterococcus spp. in the intervention village compared to the control village for water and hands rinse samples. Conversely, no significant reduction in target pathogen concentration was observed for water and hand rinse samples. In swab samples, there was a reduction mostly in pathogen concentration rather than pathogen prevalence, highlighting that a reduction in pathogen prevalence was not always accompanied by a reduction in pathogen concentration. This study provides an understanding of WaSH intervention on microbe concentrations. Such data could help with better planning of intervention activities in the future.
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Affiliation(s)
- Sital Uprety
- Department of Civil and Environmental Engineering, University of Illinois at Urbana Champaign, Urbana, IL, USA; Department of Sanitation, Water and Solid Waste for Development (Sandec), Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Zurich, Switzerland; Department of Civil and Environmental Engineering, Tohoku University Sendai, Japan.
| | - Isaac Ngo
- Department of Microbiology, University of Illinois at Urbana Champaign, Urbana, IL, USA
| | - Marika Maggos
- Department of Microbiology, University of Illinois at Urbana Champaign, Urbana, IL, USA
| | - Bipin Dangol
- Environment and Public Health Organization (ENPHO), Kathmandu, Nepal
| | - Samendra P Sherchan
- Environment and Public Health Organization (ENPHO), Kathmandu, Nepal; Department of Environmental Health Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA; BioEnvironmental Science Program Morgan State University, Baltimore, MD, 21251, USA
| | - Joanna L Shisler
- Department of Microbiology, University of Illinois at Urbana Champaign, Urbana, IL, USA; Institute of Genomic Biology, University of Illinois at Urbana Champaign, Urbana, IL, USA
| | - Mohan Amarasiri
- School of Allied Health Sciences, Kitasato University, Sagamihara, Japan
| | - Daisuke Sano
- Department of Frontier Sciences for Advanced Environment, Tohoku University, Sendai, Japan; Department of Civil and Environmental Engineering, Tohoku University Sendai, Japan
| | - Thanh H Nguyen
- Department of Civil and Environmental Engineering, University of Illinois at Urbana Champaign, Urbana, IL, USA; Institute of Genomic Biology, University of Illinois at Urbana Champaign, Urbana, IL, USA
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