An interventional study of Concrete household floor in Ascaris Lumbricoides Infection, Necator Americanus Infection and Trichuris Trichiura; Infection, sponsored by Stanford University. Active, not recruiting at 1 site in Bangladesh. Per ClinicalTrials.gov, last updated 2026-04-28.
Sponsored by Stanford University · Not applicable, Interventional, and Prevention
This randomized trial in rural Bangladesh will measure whether installing concrete floors in households with soil floors reduces child enteric infection. The trial will randomize eligible households to receive concrete household floors or to no intervention and measure effects on child soil-transmitted helminth infection, diarrhea, and other enteric infections. The study will collect longitudinal follow-up measurements at birth and when children are ages 3, 6, 12, 18, and 24 months.
30 studies on the registry are indexed under Trichuriasis; 7 are open to participants now.
This study's planned enrollment of 800 is above the median of 315 across 27 interventional studies indexed under Trichuriasis.
Browse Trichuriasis studies →Stanford University is the lead sponsor of 2,168 studies on the registry; 431 are open to participants now.
Of its 267 completed or terminated interventional studies of FDA-regulated products, 207 (78%) have results posted.
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Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Other: Concrete household floor
Household soil floors will be replaced with concrete floors
Child prevalence of any soil-transmitted helminth infection
Prevalence of Ascaris lumbricoides, Necator americanus, or Trichuris trichiura infection in birth cohort detected with qPCR at 6, 12, 18, or 24 months follow-up
Time frame: Up to 24 months
Child Ascaris lumbricoides infection prevalence
Prevalence of Ascaris lumbricoides infection in birth cohort detected with qPCR at 6, 12, 18, or 24 months follow-up
Time frame: Up to 24 months
Child Necator americanus infection prevalence
Prevalence of Necator americanus infection in birth cohort detected with qPCR at 6, 12, 18, or 24 months follow-up
Time frame: Up to 24 months
Child Trichuris trichiura infection prevalence
Prevalence of Trichuris trichiura infection in birth cohort detected with qPCR at 6, 12, 18, or 24 months follow-up
Time frame: Up to 24 months
Child diarrhea prevalence
Prevalence of diarrhea is defined as 3 or more loose or watery stools in 24 hours or 1 or more stools with blood in 24 hours at any follow-up measurement. Diarrhea will be based on caregiver-reported symptoms in the birth cohort with 2-day and 7-day recall at any follow-up measurement through month 24
Time frame: Up to 24 months
Ascaris lumbricoides prevalence in household floor samples
Prevalence of Ascaris lumbricoides in household floor dust detected with qPCR in a sub-sample of households at any follow-up measurement (6, 12, 18, 24 months follow-up)
Time frame: Up to 24 months
Necator americanus prevalence in household floor samples
Prevalence of Necator americanus detected in household floor dust with qPCR in a sub-sample of households at any follow-up measurement (6, 12, 18, 24 months follow-up)
Time frame: Up to 24 months
Trichuris trichiura prevalence in household floor samples
Prevalence of Trichuris trichiura detected in household floor dust with qPCR in a sub-sample of households at any follow-up measurement (6, 12, 18, 24 months follow-up)
Time frame: Up to 24 months
Any soil-transmitted helminth prevalence in household floor samples
Prevalence of Ascaris lumbricoides, Necator americanus, or Trichuris trichiura detected in household floor dust with qPCR in a sub-sample of households at any follow-up measurement (6, 12, 18, 24 months follow-up)
Time frame: Up to 24 months
Culturable E. coli abundance in household floor samples
Abundance (most probable number per square meter) of E. coli in household floor swabs detected with IDEXX in a sub-sample of households at any follow-up measurement (6, 12, 18, 24 months follow-up)
Time frame: Up to 24 months
Culturable E. coli abundance in child hand rinse samples
Abundance (most probable number per two hands) of E. coli on child hands enumerated with IDEXX in a sub-sample of households at any follow-up measurement (6, 12, 18, 24 months follow-up)
Time frame: Up to 24 months
Culturable cefotaxime-resistant E. coli prevalence in household floor samples
Prevalence of cefotaxime-resistant E. coli in household floor swabs detected with a modified IDEXX protocol with cefotaxime supplement in a sub-sample of households at any follow-up measurement (6, 12, 18, 24 months follow-up)
Time frame: Up to 24 months
Plan to share: Yes — All human subjects and environmental data will be de-identified and published. Identifiers that will be removed include participant names, address, date of birth, and geocoordinates. Coded data from videos will be made public, but videos will not be published in order to protect participant privacy. All data will be made available at the individual level (or household level, in the case of the household survey).
Supporting information: Study protocol, Statistical analysis plan, Analytic code
Time frame: De-identified data will be made publicly available within 2 years of the end of the study or at the time of publication, whichever is sooner.
Access criteria: To be determined
This study is active, not recruiting, as verified in Apr 2026. You cannot join it, but the record below documents what was studied.
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