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UID:20251123T152304EST-66387U4MR5@132.216.98.100
DTSTAMP:20251123T202304Z
DESCRIPTION:Ayse Ercumen\, PhD\n	Project Scientist\, University of Californi
 a\, Berkeley\n\nDoes drinking water from improved sources lead to waterbor
 ne disease in low-income countries? Evidence from impact evaluations of in
 frastructure improvement in urban India and household water treatment in r
 ural Bangladesh\n\nALL ARE WELCOME\n\nAbstract:\n\nEpidemiologists are inc
 reasingly involved in leading impact evaluations of large-scale public hea
 lth interventions in order to assess whether health benefits can be demons
 trated when subjected to rigorous measurement. I will present epidemiologi
 c evidence from two large impact evaluations focused on drinking water qua
 lity and access in low-income countries.\n\nIn Hubli-Dharwad\, India\, our
  team studied an infrastructure upgrade from intermittent to continuous de
 livery of piped water\, in which 10% of the city was switched to continuou
 s water supply. Using genetic matching\, a multivariate matching technique
  (Diamond and Sekhon\, Rev Econ Stat\, 2013) with the potential for broad 
 application in epidemiologic studies\, we constructed a matched cohort of 
 4\,000 households and followed them longitudinally to record waterborne il
 lness\, child mortality and weight-for-age. We found no overall impact on 
 general diarrheal symptoms and weight-for-age but continuous supply was as
 sociated both with reduced bloody diarrhea in low-income households and re
 duced typhoid fever incidence.\n\nI will also present evidence from a clus
 ter-randomized controlled trial in rural Bangladesh\, which we designed to
  measure the diarrhea burden associated with fecal contamination of tubewe
 ll water at the point of source versus point of use. We randomly assigned 
 1\,800 households into one of three arms: drinking water treatment with ch
 lorine plus safe storage\, safe storage alone and control. Both interventi
 ons significantly reduced diarrhea in young children. Given safe storage\,
  there was no added health benefit from chlorination\, suggesting that gro
 undwater in this setting becomes contaminated predominantly during storage
  in homes and safe storage is sufficient to reduce child diarrhea.\n\nThes
 e findings highlight deteriorations in water quality associated with defic
 iencies in the distribution and handling of drinking water from sources ty
 pically categorized as improved. Efforts to reduce the global burden of wa
 terborne disease should place emphasis on interventions proven to reduce c
 ontamination at each step leading from the water source to the point of co
 nsumption\, including the distribution system and household storage contai
 ners.\n\nObjectives:\n\n1) Epidemiological study designs to assess the hea
 lth impact of water\, sanitation and hygiene improvements in low-income co
 untries\n\n2) Use of multivariate matching to study non-randomized preexis
 ting interventions\n\n3) Negative control exposures and outcomes to detect
  measurement bias and confounding in randomized trials and observational s
 tudies\n\nBio:\n\nAyse Ercumen is a research scientist in the Division of 
 Epidemiology at the UC Berkeley School of Public Health. Dr. Ercumen recei
 ved her Ph.D. in Epidemiology and her M.P.H. in Epidemiology and Biostatis
 tics from UC Berkeley\, and has an M.S. in Environmental Engineering from 
 UC Berkeley and a B.S. in the same field from Massachusetts Institute of T
 echnology. Her research interests include health impacts of urban water in
 frastructure improvements and low-cost water treatment and sanitation tech
 nologies for low-income countries. She has conducted research in Banglades
 h and India\, including large-scale health impact evaluations and randomiz
 ed controlled trials\, and she has taught advanced-level epidemiologic met
 hods and impact evaluation courses at UC Berkeley.\n\n \n\n \n\n \n\n \n\n
  \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n
DTSTART:20160307T210000Z
DTEND:20160307T220000Z
LOCATION:Room 521 (Meakins)\, McIntyre Medical Building\, CA\, QC\, Montrea
 l\, H3G 1Y6\, 3655 promenade Sir William Osler
SUMMARY:Special Epidemiology Seminar - 'Does drinking water from improved s
 ources lead to waterborne disease in low-income countries? Evidence from i
 mpact evaluations of infrastructure improvement in urban India and househo
 ld water treatment in rural Bangladesh'
URL:/epi-biostat-occh/channels/event/special-epidemiol
 ogy-seminar-does-drinking-water-improved-sources-lead-waterborne-disease-l
 ow-income-259175
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