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Lassa Fever in Liberia

12 September 2013

The Bong County Health Office in central Liberia has reported an outbreak of Lassa fever. The outbreak was first identified two months ago and a total of 12 cases have been recorded to date. Of those cases, 8 had a fatal outcome; the diagnoses was based on clinical signs and symptoms. Tissue samples have been sent out of the country for laboratory confirmation.

The Lassa fever belt in Liberia occurs predominantly in Lofa, Bong and Nimba Counties across the northern tier of counties bordering Guinea.

Advice for Travellers

Lassa fever is a low risk for most travellers unless living in poor sanitary conditions with overcrowding in rural areas where the host is usually found. Lassa fever is a zoonotic viral disease transmitted via the excreta of an infected Mastomys rat. Healthcare workers are at risk if good infection control and barrier nursing methods are not maintained.