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<full_title>WikiJournal of Medicine/An overview of Lassa fever</full_title>
<abbrev_title>Wiki.J.Med.</abbrev_title>
<issn media_type='electronic'>2002-4436 / 2470-6345 / 2639-5347</issn>
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<doi>10.15347/WJM</doi>
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<year>2019</year>
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<title>An overview of Lassa fever</title>
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<surname></surname>
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<publication_date media_type='online'>
<year>2019</year>
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<doi>10.15347/wjm/2019.002.2</doi>
<resource>https://en.wikiversity.org/wiki/WikiJournal of Medicine/An overview of Lassa fever</resource>
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This is an open access article distributed under the [https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution License], which permits unrestricted use, distribution, and reproduction, provided the original author and source are credited.</license-p>
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Lassa fever is a viral hemorrhagic fever caused by Lassa virus (''Lassa mammarenavirus''), a negative-sense single-stranded RNA virus of the ''Arenaviridae'' family. In most cases Lassa virus infection is asymptomatic (presenting no symptom). When symptomatic it is characterized by mild acute febrile disease to a chronic fatal disease with severe toxaemia, capillary leak, hemorrhagic situations, shock and multiple organ failure. Early diagnosis of Lassa fever is very important because of the transmissibility of infection, the need for potent isolation of infected persons and for containing potentially infectious specimens during laboratory testing. Lassa fever was first elucidated in the 1950s, but the virus was not recognized until 1969 when it infected two missionary nurses in Lassa Village, Borno State, Northeastern Nigeria. Natal multimammate rat or common African rat of ''Mastomys'' genus are the reservoir of Lassa virus. When the rodents become infected with Lassa virus, they infect humans through their urine and faeces, but remain unharmed. Because of its similarities with other febrile diseases such as malaria, typhoid, Ebola hemorrhagic fever, early detection is difficult. Thus when persons have persistent fever not responding to normal conventional therapies, they should be screened for other possible causes (especially in endemic regions). When the presence of Lassa fever is established in a community, immediate isolation of infected individuals, screening, standard infection prevention and control practices and meticulous contact tracing can halt outbreaks. Treatment involves supportive measures and early use of the antiviral drug ribavirin.
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