Lassa fever



You might ask, What Is Lassa fever? Lassa fever is a critical and serious viral disease, with fever, existing mostly in West Africa. It is frequently transmitted by contaminated rats. The illness was discovered in 1969 during the time when two missionary nurses died in Nigeria. The virus infection is named in the time following the town in Nigeria where the first instance occurred. As a result of study, it is noticed that Lassa fever exist more in dry season, than in the rainy season. The fever is the greatest frequently spread hemorrhagic fever.

The Viral infection seems to exist more in parts of West Africa, including Sierra Leone, Nigeria, Guinea and Liberia. Nevertheless, sporadic Lassa infections may have occurred in Countries like Senegal and Mali. Humans are infected either from contact with an affected rat or taking in of, contaminated air with rat waste material. Like all other hemorrhagic fevers, Lassa fever can be communicated directly from one human to the other. Other was it can be contracted includes; through direct contact with affected human blood excretions and secretions, through sexual contact. There have been no evidence of airborne communication from person-to-person has been seen. Communication through breast milk feeding has also been noticed.

Causes Of Lassa fever

The principal cause of Lassa virus is a rodent named Multimammate Rat of the biological genus Mastomys though it is not made known about which species of Mastomys are actually connected with Lassa fever.

  • Avoid clear contact with rats
  • If rat eat your food stuff (No matter how expensive they might seem to be) the virus could transfer to the food.
  • When a person has come in contact with the virus in the tissue, blood, secretions, or excretions of individuals infected. However the probability of Lassa fever occuring is at its optimal level.

Symptoms And Signs of Lassa fever

  • Cough
  • Chest Pain
  • Conjunctivitis
  • Facial Swelling
  • Abdominal Pain
  • Diarrhea
  • Proteinuria
  • Mucosal Bleeding
  • Vomiting
  • Sore Throat
  • Fever and
  • Back Pain

Lassa Fever

How to diagnose Lassa fever

  • The medical condition of Lassa virus can be deduced in three ways:
  • This diagnose of Lassa virus is carried out by conducting a laboratory test in a test centre.
  • By isolating the virus from urine, blood, or throat washings.
  • By demonstrating the presence of immune-globuline M (IgM) antibody to Lassa virus.
  • Showing fourfold rise in titer IgG antibody between acute- and convalescent-phase serums.

Lassa fever

How to Prevent Lassa fever Virus

Avoid direct contact between rats and human beings
Separating infected patients from close contact with unprotected persons until the disease has been treated.

  • Cook all foods very well
  • Wear protective clothing, such as gloves, masks, gowns and Glasses
  • Block rat hideouts
  • Cover all foods and water properly.
  • If you are suspecting that rat has eaten any food, throw it away
  • Keep your house and Environment clean
  • Store foodstuffs in rodent proof containers
  • Avoiding contact with Mastomys rodents(The rat that causes Lassa fever).



As soon as you suspect Lassa fever and you have constant fever that is not responding to the normal/principal treatment of malaria and typhoid, Kindly report to the nearest Health centre.

Treatment for Lassa Fever

Ribavirin, is an antiviral drug that is successfully used with people infected by Lassa fever. However, study has been shown that it is most effective when treatment is administered early in the period of illness. People should also receive fine support that consists of maintenance of:

Blood pressure
Treatment of complicating infections
Appropriate fluid and electrolyte balance

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