Under the Radar: Lassa Fever

What is Lassa Fever?

The disease was first recognized in 1969 in northeastern Nigeria. The virus is acquired from African rodents and their secretions, primarily the Multimammate rat (Mastomys natalensis), its natural reservoir. A secondary person-to-person transmission can occur through contact with infected bodily fluids.

The illness is characterized by fever, pharyngitis, headache, chest pain, and diarrhea. 

Leukopenia, proteinuria, and hepatic dysfunction may also be present. Permanent hearing loss is common – this disease is the most common cause of acquired deafness in West Africa. Reported case-fatality rates range between 15-25%.

Distribution

It is estimated that as many as 500,000 individuals are infected in West Africa each year, resulting in 5,000 deaths. During the past 50 years, at least 88 travelers have returned home to other countries with this disease – including 11 importations into the United States. 

An ongoing outbreak of Lassa Fever continues in Nigeria well into 2020 – with 5,527 cases (222 fatal) reported as of August 16…all against the background of COVID-19.

Recent Lassa Fever outbreaks map, 2018-2020, GIDEON

The GIDEON Difference

GIDEON is one of the most well-known and comprehensive global databases for infectious diseases. Data is refreshed daily, and the GIDEON API allows medical professionals and researchers access to a continuous stream of data. Whether your research involves quantifying data, learning about specific microbes, or testing out differential diagnosis tools– GIDEON has you covered with a program that has met standards for accessibility excellence.

You can also review our eBooks on Lassa Fever, Visceral Leishmaniasis, Rift Valley Fever, and more. Or check out our global status updates on countries like South Korea, Peru, Nigeria, and more!