Lassa Fever: Symptoms

Lassa Fever is a viral hemorrhagic illness caused by the Lassa virus. It is mainly found in parts of West Africa, where it remains a significant public health concern. Although many infections are mild, some cases become severe and may lead to life-threatening complications. Therefore, understanding the symptoms, causes, and prevention methods is essential for reducing the spread of this disease.

What Is Lassa Fever?

Lassa Fever is an acute viral infection transmitted primarily through contact with food or household items contaminated by the urine or droppings of infected multimammate rats. In addition, the virus can spread from person to person through direct contact with blood, saliva, urine, or other bodily fluids of an infected individual.

Healthcare workers are also at risk if they do not use appropriate infection prevention measures.

Symptoms of Lassa Fever

The symptoms of Lassa Fever usually appear 6 to 21 days after exposure to the virus. While many infected people experience mild illness, others develop severe disease.

Common symptoms include:

Fever
General weakness
Headache
Sore throat
Muscle pain
Chest pain
Nausea and vomiting
Diarrhea
Abdominal pain
Persistent cough

In severe cases, patients may experience:

Facial swelling
Difficulty breathing
Bleeding from the mouth, nose, or gums
Low blood pressure
Hearing loss
Seizures
Shock

Early medical evaluation can improve outcomes significantly.

Causes and Risk Factors

The primary cause of Lassa Fever is infection with the Lassa virus. People become infected after exposure to contaminated food, surfaces, or household items.

Several factors increase the risk, including:

Living in areas where infected rodents are common
Poor food storage practices
Limited sanitation
Close contact with infected patients
Lack of protective equipment in healthcare settings

Consequently, improving hygiene and rodent control plays a major role in prevention.

Diagnosis

Doctors diagnose Lassa Fever by reviewing symptoms, travel history, and possible exposure. Laboratory tests are necessary to confirm the infection.

Common diagnostic methods include:

PCR (Polymerase Chain Reaction)
Blood tests
Antigen detection
Antibody testing

Because the symptoms resemble malaria, typhoid fever, and other viral illnesses, laboratory confirmation is important.

Treatment for Lassa Fever

There is no universal cure for Lassa Fever. However, early treatment greatly improves survival.

Treatment may include:

Antiviral medication such as ribavirin (most effective when started early)
Intravenous fluids
Oxygen therapy
Blood pressure support
Electrolyte replacement
Treatment of complications

Patients with severe illness often require hospital care and close monitoring.

How to Prevent Lassa Fever

Prevention focuses on avoiding exposure to infected rodents and limiting person-to-person transmission.

Follow these prevention tips:

Store food in rodent-proof containers.
Keep homes clean and free of rodents.
Dispose of garbage properly.
Wash hands regularly with soap and water.
Avoid contact with infected bodily fluids.
Wear personal protective equipment when caring for patients.
Follow infection control guidelines in healthcare facilities.

Additionally, educating communities about safe hygiene practices can reduce outbreaks.

Possible Complications

Without prompt treatment, Lassa Fever may cause serious health problems, including:

Severe bleeding
Organ failure
Permanent hearing loss
Pregnancy complications
Death

Fortunately, early diagnosis and supportive care greatly reduce these risks.

When to Seek Medical Care

Seek immediate medical attention if you develop fever and flu-like symptoms after visiting or living in areas where Lassa Fever occurs. Early diagnosis helps prevent complications and improves recovery.

Lassa Fever remains an important infectious disease in parts of West Africa. Although many infections are mild, severe cases require urgent medical care. Recognizing the symptoms, seeking early treatment, and following preventive measures are the best ways to reduce the risk of infection. Staying informed and practicing good hygiene can protect both individuals and communities.