Lassar Fever or Lassar Heamorrhagic Fever is a viral infection that is caused by lassar virus. The primary host is Natal multimammate mouse (Mastomys natalensis), The virus is transmitted by contact with the feces and urine of such mouse. After the incubation period of 6-21 days, an acute illness with multiorgan failure develops which eventually leads to death. At its early stage, the manifestations is difficult to differentiate from Ebola and malaria. The virus is excreted in urine for 3-9 weeks and in semen for three months.
Control of the Mastomys rodent population is impractical, so measures are limited to keeping rodents out of homes and food supplies, as well as maintaining effective personal hygiene. Gloves, masks, laboratory coats, and goggles are advised while in contact with an infected person. All persons suspected of Lassa fever infection should be admitted to isolation facilities and their body fluids and excreta properly disposed of. Certain anti viral drugs like Ribavarin are used in the treatment.