PMID- 25531344 OWN - NLM STAT- MEDLINE DCOM- 20150908 LR - 20181113 IS - 1557-8976 (Electronic) IS - 0882-8245 (Print) IS - 0882-8245 (Linking) VI - 28 IP - 1 DP - 2015 Feb TI - Multiple circulating infections can mimic the early stages of viral hemorrhagic fevers and possible human exposure to filoviruses in Sierra Leone prior to the 2014 outbreak. PG - 19-31 LID - 10.1089/vim.2014.0108 [doi] AB - Lassa fever (LF) is a severe viral hemorrhagic fever caused by Lassa virus (LASV). The LF program at the Kenema Government Hospital (KGH) in Eastern Sierra Leone currently provides diagnostic services and clinical care for more than 500 suspected LF cases per year. Nearly two-thirds of suspected LF patients presenting to the LF Ward test negative for either LASV antigen or anti-LASV immunoglobulin M (IgM), and therefore are considered to have a non-Lassa febrile illness (NLFI). The NLFI patients in this study were generally severely ill, which accounts for their high case fatality rate of 36%. The current studies were aimed at determining possible causes of severe febrile illnesses in non-LF cases presenting to the KGH, including possible involvement of filoviruses. A seroprevalence survey employing commercial enzyme-linked immunosorbent assay tests revealed significant IgM and IgG reactivity against dengue virus, chikungunya virus, West Nile virus (WNV), Leptospira, and typhus. A polymerase chain reaction-based survey using sera from subjects with acute LF, evidence of prior LASV exposure, or NLFI revealed widespread infection with Plasmodium falciparum malaria in febrile patients. WNV RNA was detected in a subset of patients, and a 419 nt amplicon specific to filoviral L segment RNA was detected at low levels in a single patient. However, 22% of the patients presenting at the KGH between 2011 and 2014 who were included in this survey registered anti-Ebola virus (EBOV) IgG or IgM, suggesting prior exposure to this agent. The 2014 Ebola virus disease (EVD) outbreak is already the deadliest and most widely dispersed outbreak of its kind on record. Serological evidence reported here for possible human exposure to filoviruses in Sierra Leone prior to the current EVD outbreak supports genetic analysis that EBOV may have been present in West Africa for some time prior to the 2014 outbreak. FAU - Boisen, Matthew L AU - Boisen ML AD - 1 Corgenix Medical Corporation, Inc. , Broomfield, Colorado. FAU - Schieffelin, John S AU - Schieffelin JS FAU - Goba, Augustine AU - Goba A FAU - Oottamasathien, Darin AU - Oottamasathien D FAU - Jones, Abigail B AU - Jones AB FAU - Shaffer, Jeffrey G AU - Shaffer JG FAU - Hastie, Kathryn M AU - Hastie KM FAU - Hartnett, Jessica N AU - Hartnett JN FAU - Momoh, Mambu AU - Momoh M FAU - Fullah, Mohammed AU - Fullah M FAU - Gabiki, Michael AU - Gabiki M FAU - Safa, Sidiki AU - Safa S FAU - Zandonatti, Michelle AU - Zandonatti M FAU - Fusco, Marnie AU - Fusco M FAU - Bornholdt, Zach AU - Bornholdt Z FAU - Abelson, Dafna AU - Abelson D FAU - Gire, Stephen K AU - Gire SK FAU - Andersen, Kristian G AU - Andersen KG FAU - Tariyal, Ridhi AU - Tariyal R FAU - Stremlau, Mathew AU - Stremlau M FAU - Cross, Robert W AU - Cross RW FAU - Geisbert, Joan B AU - Geisbert JB FAU - Pitts, Kelly R AU - Pitts KR FAU - Geisbert, Thomas W AU - Geisbert TW FAU - Kulakoski, Peter AU - Kulakoski P FAU - Wilson, Russell B AU - Wilson RB FAU - Henderson, Lee AU - Henderson L FAU - Sabeti, Pardis C AU - Sabeti PC FAU - Grant, Donald S AU - Grant DS FAU - Garry, Robert F AU - Garry RF FAU - Saphire, Erica O AU - Saphire EO FAU - Branco, Luis M AU - Branco LM FAU - Khan, Sheik Humarr AU - Khan SH CN - Viral Hemorrhagic Fever Consortium LA - eng GR - U19 AI115589/AI/NIAID NIH HHS/United States GR - AI082119/AI/NIAID NIH HHS/United States GR - UC7 AI094660/AI/NIAID NIH HHS/United States GR - AI067188/AI/NIAID NIH HHS/United States GR - U19 AI109762/AI/NIAID NIH HHS/United States GR - R44 AI088843/AI/NIAID NIH HHS/United States GR - UC7 AI070083/AI/NIAID NIH HHS/United States GR - R01 AI104621/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - United States TA - Viral Immunol JT - Viral immunology JID - 8801552 RN - 0 (Antibodies, Bacterial) RN - 0 (Antibodies, Viral) RN - 0 (DNA, Protozoan) RN - 0 (Immunoglobulin G) RN - 0 (Immunoglobulin M) RN - 0 (RNA, Viral) SB - IM MH - Antibodies, Bacterial/blood MH - Antibodies, Viral/blood MH - DNA, Protozoan/blood MH - *Disease Outbreaks MH - Enzyme-Linked Immunosorbent Assay MH - Hemorrhagic Fevers, Viral/*epidemiology/*etiology/pathology MH - Humans MH - Immunoglobulin G/blood MH - Immunoglobulin M/blood MH - Polymerase Chain Reaction MH - RNA, Viral/blood MH - Retrospective Studies MH - Seroepidemiologic Studies MH - Sierra Leone/epidemiology PMC - PMC4287116 EDAT- 2014/12/23 06:00 MHDA- 2015/09/09 06:00 PMCR- 2016/02/01 CRDT- 2014/12/23 06:00 PHST- 2014/12/23 06:00 [entrez] PHST- 2014/12/23 06:00 [pubmed] PHST- 2015/09/09 06:00 [medline] PHST- 2016/02/01 00:00 [pmc-release] AID - 10.1089/vim.2014.0108 [pii] AID - 10.1089/vim.2014.0108 [doi] PST - ppublish SO - Viral Immunol. 2015 Feb;28(1):19-31. doi: 10.1089/vim.2014.0108.