Hantavirus: what are the symptoms and how is spread

Hantavirus is a rare but potentially serious viral infection mainly transmitted through contact with infected rodents or their waste. Although uncommon, the infection can lead to severe respiratory or kidney-related complications in some cases.

Understanding how hantavirus spreads and recognising its symptoms early can help reduce the risk of serious illness.

What is hantavirus?

Hantavirus refers to a group of viruses carried primarily by rodents. Humans can become infected after exposure to contaminated urine, droppings or saliva from infected rodents.

Different strains of hantavirus exist around the world. In the Americas, the virus is more commonly linked to Hantavirus Pulmonary Syndrome (HPS), a severe illness affecting the lungs. In Europe and Asia, some strains are associated with haemorrhagic fever with renal syndrome (HFRS), which mainly affects the kidneys.

How is hantavirus spread?

Hantavirus is most commonly spread when people breathe in tiny airborne particles contaminated with rodent urine, droppings or saliva.

This can happen when cleaning or entering places where rodents have been present, including:

• Sheds
• Garages
• Attics
• Storage rooms
• Cabins
• Poorly ventilated spaces

The virus may also spread through:

• Direct contact with rodents or their waste
• Touching contaminated surfaces and then touching the mouth or nose
• Rodent bites in rare cases
• Contaminated food

Most hantavirus strains do not spread from person to person. Human transmission is extremely rare and has only been documented with specific strains in certain regions.

What are the symptoms of hantavirus?

Symptoms usually appear between 1 and 8 weeks after exposure. Early symptoms are often similar to flu-like illnesses, which can make hantavirus difficult to recognise initially.

Early symptoms

Common early symptoms include:

• Fever
• Fatigue
• Muscle aches
• Headache
• Chills
• Dizziness
• Nausea or vomiting
• Abdominal pain

Muscle pain is often particularly noticeable in the back, shoulders and thighs.

Severe symptoms

As the infection progresses, some people may develop more serious symptoms, especially affecting the lungs.

These may include:

• Shortness of breath
• Persistent cough
• Chest tightness
• Difficulty breathing

In severe cases, hantavirus can lead to Hantavirus Pulmonary Syndrome (HPS), which may require urgent hospital treatment.

Certain strains may also affect the kidneys, potentially causing:

• Low blood pressure
• Reduced urine output
• Kidney dysfunction

When should you seek medical advice?

You should seek medical attention if you develop flu-like symptoms after possible exposure to rodents or rodent-infested environments, especially if breathing difficulties begin to appear.

Early diagnosis and supportive treatment are important because symptoms can worsen quickly in severe cases.

How is hantavirus diagnosed?

Doctors usually diagnose hantavirus based on symptoms, recent exposure history and laboratory tests such as blood tests.

Because the infection can resemble other viral illnesses in its early stages, informing a healthcare professional about possible rodent exposure can help support diagnosis.

Is there a treatment for hantavirus?

There is currently no specific antiviral cure for hantavirus infection. Treatment focuses on supportive care and symptom management.

Depending on severity, medical care may include:

• Oxygen therapy
• Intravenous fluids
• Intensive care monitoring
• Mechanical ventilation for severe breathing difficulties

Early medical intervention can improve outcomes.

How can hantavirus be prevented?

Reducing exposure to rodents is the most effective way to prevent hantavirus infection.

Helpful prevention measures include:

• Sealing holes and entry points in buildings
• Storing food securely
• Wearing gloves and masks when cleaning rodent-infested areas
• Ventilating enclosed spaces before cleaning
• Disinfecting contaminated surfaces carefully

Avoid sweeping or vacuuming dry rodent droppings directly, as this can release contaminated particles into the air.

Summarising hantavirus by Dr.Online

The virus is most commonly spread through contact with contaminated particles in rodent-infested areas. Early symptoms often include fever, fatigue, muscle aches and headaches, while severe cases may cause breathing difficulties or kidney complications.

Although hantavirus infections are rare, recognising symptoms early and understanding how the virus spreads can help reduce the risk of serious complications. Avoiding contact with rodent waste and cleaning contaminated areas carefully are important preventive measures.

At Dr.Online, you can learn more about infections, symptoms, prevention and general health. If you are feeling unwell or have concerns about symptoms, you can also access online healthcare services, including medical consultations, advice and support from qualified healthcare professionals.