{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,11]],"date-time":"2026-06-11T16:12:37Z","timestamp":1781194357775,"version":"3.54.1"},"update-to":[{"DOI":"10.1371\/journal.pntd.0011500","type":"new_version","label":"New version","source":"publisher","updated":{"date-parts":[[2024,4,23]],"date-time":"2024-04-23T00:00:00Z","timestamp":1713830400000}}],"reference-count":45,"publisher":"Public Library of Science (PLoS)","issue":"4","license":[{"start":{"date-parts":[[2024,4,11]],"date-time":"2024-04-11T00:00:00Z","timestamp":1712793600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100010767","name":"Innovative Medicines Initiative","doi-asserted-by":"publisher","award":["grant agreement EBOVAC1 (grant nr. 115854), EBOVAC2 (grant nr. 115861) and EBOVAC3 (grant nr.800176)"],"award-info":[{"award-number":["grant agreement EBOVAC1 (grant nr. 115854), EBOVAC2 (grant nr. 115861) and EBOVAC3 (grant nr.800176)"]}],"id":[{"id":"10.13039\/501100010767","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.plosntds.org"],"crossmark-restriction":false},"short-container-title":["PLoS Negl Trop Dis"],"abstract":"<jats:sec id=\"sec001\">\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>The exposure to parasites may influence the immune response to vaccines in endemic African countries. In this study, we aimed to assess the association between helminth exposure to the most prevalent parasitic infections, schistosomiasis, soil transmitted helminths infection and filariasis, and the Ebola virus glycoprotein (EBOV GP) antibody concentration in response to vaccination with the Ad26.ZEBOV, MVA-BN-Filo vaccine regimen in African and European participants using samples obtained from three international clinical trials.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec002\">\n                    <jats:title>Methods\/Principal findings<\/jats:title>\n                    <jats:p>\n                      We conducted a study in a subset of participants in the EBL2001, EBL2002 and EBL3001 clinical trials that evaluated the Ad26.ZEBOV, MVA-BN-Filo vaccine regimen against EVD in children, adolescents and adults from the United Kingdom, France, Burkina Faso, Cote d\u2019Ivoire, Kenya, Uganda and Sierra Leone. Immune markers of helminth exposure at baseline were evaluated by ELISA with three commercial kits which detect IgG antibodies against schistosome, filarial and\n                      <jats:italic>Strongyloides<\/jats:italic>\n                      antigens. Luminex technology was used to measure inflammatory and activation markers, and Th1\/Th2\/Th17 cytokines at baseline. The association between binding IgG antibodies specific to EBOV GP (measured on day 21 post-dose 2 and on Day 365 after the first dose respectively), and helminth exposure at baseline was evaluated using a multivariable linear regression model adjusted for age and study group.\n                    <\/jats:p>\n                    <jats:p>\n                      Seventy-eight (21.3%) of the 367 participants included in the study had at least one helminth positive ELISA test at baseline, with differences of prevalence between studies and an increased prevalence with age. The most frequently detected antibodies were those to\n                      <jats:italic>Schistosoma mansoni<\/jats:italic>\n                      (10.9%), followed by\n                      <jats:italic>Acanthocheilonema viteae<\/jats:italic>\n                      (9%) and then\n                      <jats:italic>Strongyloides ratti<\/jats:italic>\n                      (7.9%). Among the 41 immunological analytes tested, five were significantly (p &lt; .003) lower in participants with at least one positive helminth ELISA test result: CCL2\/MCP1, FGFbasic, IL-7, IL-13 and CCL11\/Eotaxin compared to participants with negative helminth ELISA tests. No significant association was found with EBOV-GP specific antibody concentration at 21 days post-dose 2, or at 365 days post-dose 1, adjusted for age group, study, and the presence of any helminth antibodies at baseline.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec003\">\n                    <jats:title>Conclusions\/Significance<\/jats:title>\n                    <jats:p>No clear association was found between immune markers of helminth exposure as measured by ELISA and post-vaccination response to the Ebola Ad26.ZEBOV\/ MVA-BN-Filo vaccine regimen.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec004\">\n                    <jats:title>Trial registration<\/jats:title>\n                    <jats:p>\n                      <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/clinicaltrials.gov\/ct2\/show\/NCT02416453\" xlink:type=\"simple\">NCT02416453<\/jats:ext-link>\n                      ,\n                      <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/clinicaltrials.gov\/ct2\/show\/NCT02564523\" xlink:type=\"simple\">NCT02564523<\/jats:ext-link>\n                      ,\n                      <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/clinicaltrials.gov\/ct2\/show\/NCT02509494\" xlink:type=\"simple\">NCT02509494<\/jats:ext-link>\n                      . ClinicalTrials.gov.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1371\/journal.pntd.0011500","type":"journal-article","created":{"date-parts":[[2024,4,11]],"date-time":"2024-04-11T16:19:58Z","timestamp":1712852398000},"page":"e0011500","update-policy":"https:\/\/doi.org\/10.1371\/journal.pntd.corrections_policy","source":"Crossref","is-referenced-by-count":5,"title":["Helminth exposure and immune response to the two-dose heterologous Ad26.ZEBOV, MVA-BN-Filo Ebola vaccine regimen"],"prefix":"10.1371","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8114-1240","authenticated-orcid":true,"given":"Houreratou","family":"Barry","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edouard","family":"Lhomme","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mathieu","family":"Sur\u00e9naud","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Moumini","family":"Nouctara","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cynthia","family":"Robinson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Viki","family":"Bockstal","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Innocent","family":"Valea","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Serge","family":"Somda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Halidou","family":"Tinto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicolas","family":"Meda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brian","family":"Greenwood","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5235-3962","authenticated-orcid":true,"given":"Rodolphe","family":"Thi\u00e9baut","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christine","family":"Lacabaratz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2024,4,11]]},"reference":[{"issue":"10174","key":"pntd.0011500.ref001","doi-asserted-by":"crossref","first-page":"936","DOI":"10.1016\/S0140-6736(18)33132-5","article-title":"Ebola virus disease","volume":"393","author":"D Malvy","year":"2019","journal-title":"Lancet"},{"key":"pntd.0011500.ref002","article-title":"WHO prequalifies Ebola vaccine, paving the way for its use in high-risk countries.","author":"World Health Organization"},{"key":"pntd.0011500.ref003","article-title":"Strategic Advisory Group of Experts (SAGE) on immunization interim recommendations on vaccination against Ebola Virus Disease (EVD)","author":"World Health Organization","year":"2019"},{"key":"pntd.0011500.ref004","unstructured":"Vaccine against Ebola: Commission grants new market authorizations. 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