What is Mastomys Natalis?
French. The reservoir, or host, of Lassa virus is a rodent known as the “multimammate rat” (Mastomys natalensis). Once infected, this rodent is able to excrete virus in urine for an extended time period, maybe for the rest of its life.
What is Lassa fever?
Lassa fever is an animal-borne, or zoonotic, acute viral illness spread by the common African rat. It is endemic in parts of West Africa including Sierra Leone, Liberia, Guinea and Nigeria. Neighboring countries are also at risk because the animal vector lives throughout the region.
What are the symptoms of Lassa fever?
Symptoms of Lassa fever The onset of the disease, when it is symptomatic, is usually gradual, starting with fever, general weakness, and malaise. After a few days, headache, sore throat, muscle pain, chest pain, nausea, vomiting, diarrhoea, cough, and abdominal pain may follow.
Who discovered Lassa virus?
The Yale epidemiologist who discovered Lassa fever in 1969 very nearly died of what was then a mystery illness while he was investigating it. Dr Jordi Casals-Ariet was studying the blood samples of three US missionary nurses who had become seriously ill while visiting northern Nigeria.
Can dogs get Lassa fever?
Asymptomatic Ebola infection in humans has also been observed during outbreaks (18) but is very rare. Although dogs can be asymptomatically infected, they may excrete infectious viral particles in urine, feces, and saliva for a short period before virus clearance, as observed experimentally in other animals.
How long can Lassa virus survive outside the body?
SURVIVAL OUTSIDE HOST: The virus is stable as an aerosol, particularly at low relative humidity (30 % RH ). The biological half-live at both 24°C and 32°C ranges from 10.1 to 54.6 minutes 20.
How did the Lassa virus start?
The illness was discovered in 1969 when two missionary nurses died in Nigeria. The virus is named after the town in Nigeria where the first cases occurred. The virus, a member of the virus family Arenaviridae, is a single-stranded RNA virus and is zoonotic, or animal-borne.
Can Lassa fever be transmitted through sweat?
Lassa fever facts Unlike Ebola virus, Lassa fever is not as contagious person to person, nor as deadly. Lassa virus is typically transmitted by the urine or feces of Mastomys rats to humans. Health workers may be infected by direct contact with blood, body fluids, urine, or stool of a patient with Lassa fever.