Research Topics
| Thomas ClasenSummaryAffiliation: London School of Hygiene and Tropical Medicine Country: UK Publications
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Detail Information
Publications
Household water management: refining the dominant paradigmThomas F Clasen
Trop Med Int Health 9:187-91. 2004- Microbiological effectiveness and cost of boiling to disinfect drinking water in rural VietnamThomas F Clasen
London School of Hygiene and Tropical Medicine, Keppel St, London, WCIE 7H, U K
Environ Sci Technol 42:4255-60. 2008..272 per month for wood collectors and US$ 1.68 per month for wood purchasers, representing approximately 0.48% to 1.04%, respectively, of the average monthly income of participating households... 
The effect of improved rural sanitation on diarrhoea and helminth infection: design of a cluster-randomized trial in Orissa, IndiaThomas Clasen
Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
Emerg Themes Epidemiol 9:7. 2012..abstract:..- Cost of community integrated prevention campaign for malaria, HIV, and diarrhea in rural KenyaJames G Kahn
Super Models for Global Health, Oakland, California, USA
BMC Health Serv Res 11:346. 2011..Delivery of community-based prevention services for HIV, malaria, and diarrhea is a major priority and challenge in rural Africa. Integrated delivery campaigns may offer a mechanism to achieve high coverage and efficiency... - Microbiological effectiveness and cost of disinfecting water by boiling in semi-urban IndiaThomas Clasen
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
Am J Trop Med Hyg 79:407-13. 2008..1% exceeding 100 FC/100 mL. The estimated monthly fuel cost for boiling was INR 43.8 (US$0.88) for households using liquid petroleum gas and INR 34.7 (US$0.69) for households using wood... - Cost-effectiveness of water quality interventions for preventing diarrhoeal disease in developing countriesThomas Clasen
London School of Hygiene and Tropical Medicine, Keppel St, London, WC1E 7HT, UK
J Water Health 5:599-608. 2007..In addition to cost-effectiveness, choices among water quality interventions must be guided by local conditions, user preferences, potential for cost recovery from beneficiaries and other factors... - Microbiological performance of common water treatment devices for household use in IndiaThomas Clasen
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Disease Control and Vector Biology Unit, London, UK
Int J Environ Health Res 17:83-93. 2007..While household water treatment could play an important role in India, standards are necessary so that consumers can ensure that the devices they purchase and use in the home are effective and safe... 
Household water treatment and the millennium development goals: keeping the focus on healthThomas F Clasen
London School of Hygiene and Tropical Medicine
Environ Sci Technol 44:7357-60. 2010....- Interventions to improve water quality for preventing diarrhoea: systematic review and meta-analysisThomas Clasen
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London WC1E 7HT
BMJ 334:782. 2007..To assess the effectiveness of interventions to improve the microbial quality of drinking water for preventing diarrhoea... - Household water treatment using sodium dichloroisocyanurate (NaDCC) tablets: a randomized, controlled trial to assess microbiological effectiveness in BangladeshThomas Clasen
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
Am J Trop Med Hyg 76:187-92. 2007..7% of samples exceeded the WHO guideline value of 5.0 mg/L, underscoring the need to ensure that tablet dose and vessel size are compatible... - Microbiological performance of a water treatment unit designed for household use in developing countriesThomas Clasen
Disease Control and Vector Biology Unit, London School of Hygiene and Tropical Medicine, London, UK
Trop Med Int Health 11:1399-405. 2006..If these results are validated in field trials, the deployment of the unit on a wide scale among vulnerable populations may make an important contribution to public health efforts to control intractable waterborne diseases... - Interventions to improve water quality for preventing diarrhoeaT Clasen
London School of Hygiene and Tropical Medicine, Department of Infectious and Tropical Diseases, Keppel Street, London, UK WC1E 7HT
Cochrane Database Syst Rev 3:CD004794. 2006.... - Preventing diarrhoea with household ceramic water filters: assessment of a pilot project in BoliviaThomas F Clasen
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, UK
Int J Environ Health Res 16:231-9. 2006..Water samples from all regularly used filters were free of thermotolerant coliforms... - Sodium dichloroisocyanurate (NaDCC) tablets as an alternative to sodium hypochlorite for the routine treatment of drinking water at the household levelThomas Clasen
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel St, London WC1E 7HT, UK
Int J Hyg Environ Health 209:173-81. 2006..Finally, we examine studies and data to compare NaDCC with NaOCl in terms of compliance, acceptability, affordability and sustainability, and suggest areas for further research... - Household-based ceramic water filters for the prevention of diarrhea: a randomized, controlled trial of a pilot program in ColombiaThomas Clasen
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
Am J Trop Med Hyg 73:790-5. 2005.... - Faecal contamination of drinking water during collection and household storage: the need to extend protection to the point of useThomas F Clasen
London School of Hygiene and Tropical Medicine, Keppel St, London WC1E 7HT, UK
J Water Health 1:109-15. 2003..The options for such extended protection, including improved collection and storage methods and household-based water treatment, are discussed... - Safe household water treatment and storage using ceramic drip filters: a randomised controlled trial in BoliviaT Clasen
London School of Hygiene and Tropical Medicine and First Water Ltd, Keppel St, London WC1E 7HT, UK
Water Sci Technol 50:111-5. 2004..The filter systems also demonstrated an ability to maintain the high quality of the treated water against subsequent re-contamination in the home... - Reducing diarrhea through the use of household-based ceramic water filters: a randomized, controlled trial in rural BoliviaThomas F Clasen
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
Am J Trop Med Hyg 70:651-7. 2004..001). These results show that affordable ceramic water filters enable low-income households to treat and maintain the microbiologic quality of their drinking water... - Laboratory assessment of a gravity-fed ultrafiltration water treatment device designed for household use in low-income settingsThomas Clasen
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, England
Am J Trop Med Hyg 80:819-23. 2009..If these results are validated in field trials, the deployment of the unit on a wide scale among vulnerable populations may make an important contribution to public health efforts to control intractable waterborne diseases... - Randomized controlled trial in rural Ethiopia to assess a portable water treatment deviceSophie Boisson
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London WCIE 7HT, United Kingdom
Environ Sci Technol 43:5934-9. 2009.... - Assessing water filtration and safe storage in households with young children of HIV-positive mothers: a randomized, controlled trial in ZambiaRachel Peletz
London School of Hygiene and Tropical Medicine, London, United Kingdom
PLoS ONE 7:e46548. 2012..This population may particularly benefit from an intervention to improve water quality in the home... - Epidemiological methods in diarrhoea studies--an updateWolf Peter Schmidt
Department for Disease Control, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
Int J Epidemiol 40:1678-92. 2011..Challenges include the diagnosis based on self-reported symptoms, the logistical burden of intensive surveillance and the variability of diarrhoea in space, time and person... - Recent diarrhoeal illness and risk of lower respiratory infections in children under the age of 5 yearsWolf Peter Schmidt
Department for Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
Int J Epidemiol 38:766-72. 2009..We explored whether this is due to common risk factors for both conditions or whether diarrhoea can increase the risk of ALRI directly... - Field assessment of a novel household-based water filtration device: a randomised, placebo-controlled trial in the Democratic Republic of CongoSophie Boisson
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
PLoS ONE 5:e12613. 2010..However, current methods of treating water at home have certain shortcomings, and there is evidence of bias in the reported health impact of the intervention in open trial designs... - Assessing the impact of a school-based safe water intervention on household adoption of point-of-use water treatment practices in southern IndiaMatthew C Freeman
Department of Disease Control, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
Am J Trop Med Hyg 84:370-8. 2011..53)... - Drinking water quality, feeding practices, and diarrhea among children under 2 years of HIV-positive mothers in peri-urban ZambiaRachel Peletz
London School of Hygiene and Tropical Medicine, London, UK
Am J Trop Med Hyg 85:318-26. 2011..60, 95% CI = 1.29-16.42). Children born to HIV-positive mothers were exposed to contaminated water through direct intake of drinking water, indicating the need for interventions to ensure microbiological water quality... - Microbiological effectiveness of disinfecting water by boiling in rural GuatemalaGhislaine Rosa
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
Am J Trop Med Hyg 82:473-7. 2010..As actually practiced in the study community, boiling significantly improved the microbiological quality of drinking water, though boiled and stored drinking water is not always free of fecal contaminations... - Sampling strategies to measure the prevalence of common recurrent infections in longitudinal studiesWolf Peter Schmidt
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, UK
Emerg Themes Epidemiol 7:5. 2010..In contrast to incidence which usually requires continuous sampling, LP can be measured at intervals. This study explored how many more participants are needed for infrequent sampling to achieve the same study power as frequent sampling... - High adherence is necessary to realize health gains from water quality interventionsJoe Brown
Department of Disease Control, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
PLoS ONE 7:e36735. 2012..Household water treatment (HWT) has been recommended for improving access to potable water where existing sources are unsafe. Reports of low adherence to HWT may limit the usefulness of this approach, however... - Making sanitation count: developing and testing a device for assessing latrine use in low-income settingsThomas Clasen
Department of Disease Control, London School of Hygiene and Tropical Medicine, London WC1E 7HT, United Kingdom
Environ Sci Technol 46:3295-303. 2012.... - Estimating the scope of household water treatment in low- and medium-income countriesGhislaine Rosa
Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, United Kingdom
Am J Trop Med Hyg 82:289-300. 2010..Validation of the household surveys and further analysis of these data could help optimize HWT practices... - Assessing the microbiological performance and potential cost of boiling drinking water in urban ZambiaRebecca Psutka
London School of Hygiene and Tropical Medicine, Keppel St, London WC1E 7H, United Kingdom
Environ Sci Technol 45:6095-101. 2011.... - Estimating the longitudinal prevalence of diarrhea and other episodic diseases: continuous versus intermittent surveillanceWolf Peter Schmidt
Infectious and Tropical Diseases Department, London School of Hygiene and Tropical Medicine, London, United Kingdom
Epidemiology 18:537-43. 2007..The aim of this analysis was to compare estimates of longitudinal prevalence based on intermittent sampling at regular intervals with 24- or 48-hour recall, with estimates based on continuous surveillance... - International network to promote household water treatment and safe storageThomas F Clasen
London School of Hygiene and Tropical Medicine, United Kingdom
Emerg Infect Dis 10:1179-80. 2004 - Comparison of Kato-Katz, ethyl-acetate sedimentation, and Midi Parasep(®) in the diagnosis of hookworm, Ascaris and Trichuris infections in the context of an evaluation of rural sanitation in IndiaAnna L Funk
Environmental Health Group, London School of Hygiene and Tropical Medicine, Keppel Street, WC1E 7HT, London, UK
Acta Trop 126:265-8. 2013..The conventional ethyl-acetate technique produced smaller pellets and showed lower pellet mobility as compared to the Midi Parasep(®)...