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Evidence Based Targeted Water, Sanitation, and Hygiene Interventions to Reduce Cholera in Hotspots in the Democratic Republic of the Congo

Bukavu, Congo


Household members of cholera patients are at a 100 times higher risk of developing a cholera infection than the general population during the one-week period after the patient presents at a health facility. Little work, however, has been done to develop ways of reducing these household members’ risk of infection. To address this gap, researchers will develop and evaluate a water, sanitation, and hygiene (WASH) intervention targeted at this high-risk population in the Democratic Republic of the Congo.

The project has three primary activities:

1. Develop a theory-driven evidence-based targeted WASH intervention for household members of cholera patients in South Kivu, Democratic Republic of the Congo, through formative research and pilot testing. 2. Conduct a randomized controlled trial of 900 household members of cholera patients to evaluate the effectiveness of the intervention in reducing cholera infections and the presence of the bacteria that causes it, Vibrio cholerae, in the household. 3. Investigate transmission and population dynamics of Vibrio cholerae among households with a cholera patient using whole genome sequencing and spatial mapping.

This project is modeled after the successful Cholera-Hospital-Based-Intervention-for-7-Days (CHoBI7–chobi means “picture” in Bangla) in Bangladesh. Also led by George, CHoBI7 demonstrated that a targeted WASH intervention can significantly reduce symptomatic cholera among household members of cholera patients and lead to sustained improvements in handwashing with soap and stored drinking water quality 12 months after the intervention.

George and her colleagues will investigate how CHoBI7 can be adapted for South Kivu and ultimately integrated into the National Cholera Elimination Plan for the DRC.


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Project Type


  • Bukavu, Congo - selected city