[Epidemiology of hepatitis E: a (re) emerging disease?]

Hepatitis E virus (VHE) is a RNA, non-enveloped, enterically transmitted virus. VHE is present all around the world, with different distribution of its genotypes. VHE of genotypes 1 and 2 predominate in Asia, Africa and in Mexico, responsible for outbreaks transmitted through contaminated water, with an increased mortality in pregnant women. Genotype 3 VHE are globally distributed, with an animal reservoir (swine mainly) endemic in high-income countries. They are transmitted by the ingestion of raw or poorly cooked meat, and possibly by other routes (water, molluscs?) not yet firmly established. Rare post-transfusion hepatitis E cases have been reported. The prevalence of viremic blood donations is around 5 to 10,000 in Europe and in France. Screening tests and/or alternative strategies for viral elimination could be implemented soon.