{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T22:04:23Z","timestamp":1790719463248,"version":"4.1.0"},"reference-count":115,"publisher":"Public Library of Science (PLoS)","issue":"6","license":[{"start":{"date-parts":[[2022,6,1]],"date-time":"2022-06-01T00:00:00Z","timestamp":1654041600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"abstract":"<jats:sec id=\"sec001\">\n<jats:title>Background<\/jats:title>\n<jats:p>Hepatitis E virus (HEV) infection is responsible for inflammatory liver disease and can cause severe health problems. Because the seroprevalence of HEV varies within different population groups and between regions of the continent, we conducted a systematic review on the topic in order to provide evidence for targeted prevention strategies.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec002\">\n<jats:title>Methods<\/jats:title>\n<jats:p>We performed a systematic review in PubMed, SCIELO, LILACS, EBSCO, and Cochrane Library and included reports up to 25 May 2021 (PROSPERO registration number: CRD42020173934). We assessed the risk of bias, publication bias, and heterogeneity between studies and conducted a random-effect meta-analysis for proportions using a (binomial-normal) generalized linear mixed model (GLMM) fitted by Maximum Likelihood (ML). We also reported other characteristics like genotype and risk factors.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec003\">\n<jats:title>Results<\/jats:title>\n<jats:p>Of 1212 identified records, 142 fulfilled the inclusion criteria and were included in the qualitative analysis and 132 in the quantitative analysis. Our random-effects GLMM pooled overall estimate for past infection (IgG) was 7.7% (95% CI 6.4%\u20139.2%) with high heterogeneity (I<jats:sup>2<\/jats:sup> = 97%). We found higher seroprevalence in certain population groups, for example in people with pig related exposure for IgG (ranges from 6.2%\u201328% and pooled estimate of 13.8%, 95% CI: 7.6%\u201323.6%), or with diagnosed or suspected acute viral hepatitis for IgM (ranges from 0.3%\u201323.9% and pooled estimate of 5.5%, 95% CI: 2.0%\u201314.1%). Increasing age, contact with pigs and meat products, and low socioeconomic conditions are the main risk factors for HEV infection. Genotype 1 and 3 were documented across the region.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec004\">\n<jats:title>Conclusion<\/jats:title>\n<jats:p>HEV seroprevalence estimates demonstrated high variability within the Americas. There are population groups with higher seroprevalence and reported risk factors for HEV infection that need to be prioritized for further research. Due to human transmission and zoonotic infections in the region, preventive strategies should include water sanitation, occupational health, and food safety.<\/jats:p>\n<\/jats:sec>","DOI":"10.1371\/journal.pone.0269253","type":"journal-article","created":{"date-parts":[[2022,6,1]],"date-time":"2022-06-01T17:40:46Z","timestamp":1654105246000},"page":"e0269253","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":26,"title":["Seroprevalence of hepatitis E virus infection in the Americas: Estimates from a systematic review and meta-analysis"],"prefix":"10.1371","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7560-5256","authenticated-orcid":true,"given":"Nathalie Ver\u00f3nica","family":"Fern\u00e1ndez Villalobos","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Barbora","family":"Kessel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isti","family":"Rodiah","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J\u00f6rdis Jennifer","family":"Ott","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Berit","family":"Lange","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3328-8808","authenticated-orcid":true,"given":"G\u00e9rard","family":"Krause","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2022,6,1]]},"reference":[{"key":"pone.0269253.ref001","doi-asserted-by":"crossref","first-page":"130","DOI":"10.1111\/liv.13014","article-title":"Hepatitis E, the neglected one","volume":"36","author":"H Blasco-Perrin","year":"2016","journal-title":"Liver Int"},{"key":"pone.0269253.ref002","doi-asserted-by":"crossref","first-page":"988","DOI":"10.1002\/hep.25505","article-title":"The global burden of hepatitis E virus genotypes 1 and 2 in 2005","volume":"55","author":"DB Rein","year":"2012","journal-title":"Hepatology"},{"key":"pone.0269253.ref003","unstructured":"Institute of Health Metrics and Evaluation. 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