Hantavirus: Symptoms, Transmission, Diagnosis and Prevention

What Is Hantavirus?

Hantaviruses are a group of viruses whose natural reservoirs are rodents. In humans, they can cause severe illnesses, primarily:

• Hantavirus Cardiopulmonary Syndrome (HCPS),
• Hemorrhagic Fever with Renal Syndrome (HFRS).

The clinical presentation depends on the specific virus and geographic region.

Routes of Transmission

The primary route of infection is inhalation of aerosolized virus particles from the urine, saliva, or feces of infected rodents.

Less commonly, infection may occur through:

• direct contact with rodent excreta,
• rodent bites,
• contact with contaminated surfaces.

For most hantaviruses, person-to-person transmission does not occur. An exception is Andes virus, for which human-to-human transmission has been documented.

Risk Factors

The risk of infection increases with:

• exposure to areas with signs of rodent infestation,
• cleaning barns, sheds, basements, cabins, or storage areas,
• agricultural work,
• contact with dust contaminated by rodent excreta,
• living or working in endemic regions.

Symptoms

The incubation period is typically 1–8 weeks.

Early symptoms may include:

• fever,
• fatigue,
• headache,
• muscle aches,
• nausea,
• vomiting,
• abdominal pain.

Severe disease may lead to:

• shortness of breath,
• cough,
• respiratory failure,
• low blood pressure,
• kidney injury,
• coagulation abnormalities.

Diagnosis

Diagnosis is based on:

• epidemiological history,
• clinical presentation,
• laboratory confirmation.

Diagnostic methods include:

• serologic testing,
• PCR,
• complete blood count,
• kidney and liver function tests,
• assessment of respiratory function when pulmonary involvement is suspected.

Importantly, early symptoms may resemble influenza, gastrointestinal infections, or other viral illnesses; therefore, a history of rodent exposure is highly relevant.

Treatment

There is no specific antiviral treatment for most hantavirus infections.

Management is primarily supportive and includes:

• respiratory monitoring,
• oxygen therapy,
• intensive care for severe cases,
• correction of fluid and electrolyte imbalances,
• renal support when necessary.

Early medical care significantly improves the chances of a favorable outcome.

Prevention

Prevention focuses on minimizing contact with rodents and their excreta.

Recommended measures include:

• sealing openings that allow rodents to enter buildings,
• storing food in rodent-proof containers,
• avoiding dry sweeping of contaminated areas,
• wetting contaminated surfaces with disinfectant before cleaning,
• wearing gloves and protective equipment during cleaning,
• ventilating enclosed spaces before entering or cleaning them.

When to See a Doctor

Medical attention should be sought if fever, severe fatigue, muscle pain, shortness of breath, abdominal pain, nausea, or vomiting develop after possible exposure to rodents or their excreta.

Urgent medical care is required for:

• worsening shortness of breath,
• severe weakness,
• low blood pressure,
• altered consciousness,
• signs of dehydration,
• decreased urine output.

Conclusion

Hantavirus infection is a rare but potentially severe disease. The main risk comes from contact with infected rodents and their excreta. Since specific treatment is generally unavailable, prevention, early recognition of symptoms, and timely medical care are essential.