Water Disinfection Protocols for Hepatitis E Virus (WADHE)

Organisation: Oxfam Intermón

Partners: University of Barcelona

Location: Spain and at least 1 developing country with HEV outbreaks

Type of grant: Core – development

Status: Completed

  • Sampling and concentrating by glass-wool filters

  • Woman cooking Kisra

  • Sampling and concentrating by glass-wool filters 2

  • Dried Surface Water, Environmental Investigation in Maban, South Sudan

  • Drainage from Water Point, Environmental Investigation in Maban, South Sudan 2

  • Household Water Storage Recipients

Summary: Hepatitis E is an emerging waterborne virus endemic in regions with poor sanitation and hygiene, including large parts of Asia, Africa and South America. It is responsible for medium- to large-sized waterborne epidemics, causing a large proportion of cases with sporadic acute hepatitis.

Hepatitis E Virus (HEV) was very inefficiently cultured until now and no experimental data has been published on HEV disinfection. Some studies have suggested that drinking chlorinated surface water did not appear to reduce the risk of infection.

However, recently has been described a new HEV strain, that can be now used for developing disinfection and stability studies.

The development of experimental data on HEV stability in water will bring to humanitarian actors specific protocols for interventions on water or food borne HEV epidemics as well as a better understanding of risk factors and routes of HEV infection.

Challenge(s) addressed :

• Understand effectivity of water disinfection methods in presence of HEV.

• Improve understanding on HEV epidemiology and transmission routes.

Innovation Factor : The innovation proposed in this application consist on producing for the first time consistent experimental assays on HEV stability against main disinfection water treatments, filling this gap in virology and answering an operational need on water services in vulnerable settings with the end up objective of developing Standard Operational Protocols on Water Treatment in Hepatitis E utbreak scenario.

Added Value : effective and feasible water treatments should be identified to prevent human infection on HEV outbreaks (mainly transmitted by oral-faecal route) in emergency interventions.

Innovation Phases: It will consist of 4 main phases,

1) Create an experimental system to analyse HEV removal/inactivation.

2) Characterise inactivation profiles for each treatment.

3) Developing Standard Protocol for water disinfection in HEV outbreak settings

4) Identification of sources of contamination and transmission routes in a HEV outbreak

Key deliverables/ Impact :

The target beneficiaries of an evidence-based Stanadrd Protocol for water disinfection in HEV outbreak settings, and a better understanding of risk factors and transmission routes (key to prevent, control and limit HEV outbreaks) are WaSH stakeholders, specifically humanitarian International NGOs, local NGOs and Government Health officers related to WaSH work in HEV prevalent areas or HEV outbreaks.

Elrha is hosted by Save the Children, a registered charity in England and Wales (213890) and Scotland (SC039570).

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