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Overview

What Is Hantavirus?

Hantavirus is a group of viruses carried mainly by rodents. People may develop a hantavirus infection after breathing in particles contaminated with infected rodent urine, droppings, saliva, or nesting materials, or after contact with these materials. Depending on the virus and region, infection can cause hantavirus pulmonary syndrome, which mainly affects the lungs, or hemorrhagic fever with renal syndrome, which mainly affects the kidneys.

How It Spreads (Transmission)

How Hantavirus Spreads

Infection usually occurs when a person inhales contaminated particles stirred up from rodent urine, feces, saliva, nesting material, or dust. It can also follow direct contact with contaminated materials, and rodent bites are a less common route. Hantavirus infection is most often linked to cleaning, entering, or working in areas where infected rodents have been present.

  • People cleaning rodent-infested homes, sheds, barns, cabins, or other enclosed spaces may inhale contaminated dust.
  • Agricultural and pest-control workers may have repeated contact with rodents, nesting sites, or contaminated materials.
  • People living in poorly sealed buildings may be exposed when rodents enter and leave droppings or nesting material indoors.
  • People who spend time in rodent habitats, including fields, forests, or rural structures, may encounter infected rodents or their waste.

Conditions It Can Cause

Conditions Hantavirus Can Cause

  • Hantavirus pulmonary syndrome primarily affects the lungs and can progress to serious breathing problems.
  • Hemorrhagic fever with renal syndrome primarily affects the kidneys and can involve bleeding and circulatory problems.

Symptoms

Hantavirus Symptoms

Early hantavirus symptoms may include fever, fatigue, headache, muscle aches, nausea, vomiting, or abdominal symptoms. Later illness depends on the condition caused, with possible lung-related or kidney-related complications. These early symptoms can resemble other infections, so a history of rodent exposure is important.

GET MEDICAL HELP

Know the urgent warning signs

Seek immediate medical care for shortness of breath, cough, faintness, rapidly worsening illness, or reduced urine after possible rodent exposure. Hantavirus can worsen quickly and may require hospital monitoring and supportive treatment.

For detailed symptom patterns and complications, see hantavirus pulmonary syndrome and hemorrhagic fever with renal syndrome.

Diagnosis

How Hantavirus Is Diagnosed

When evaluating suspected hantavirus infection, clinicians consider recent rodent exposure, the timing of illness, symptoms, physical findings, blood counts, kidney function, oxygen levels, and chest imaging. These assessments help identify possible organ involvement while laboratory tests are used to confirm the virus.

  • Serology tests look for hantavirus-specific antibodies made by the immune system.
  • PCR or other molecular tests may detect viral genetic material when appropriate.
  • Public-health or reference laboratories may provide confirmation when specialized testing is needed.

Prevention

Hantavirus Prevention

  • Seal gaps and openings in buildings to reduce rodent entry.
  • Store food and waste in tightly closed containers.
  • Reduce rodent nesting areas by removing clutter, brush, and accessible shelter around buildings.
  • Ventilate enclosed spaces before cleaning them.
  • Wet contaminated materials thoroughly with disinfectant before handling them.
  • Wear appropriate protective equipment during cleanup.
  • Avoid sweeping or vacuuming dry droppings, urine, or nesting material because this can stir contaminated dust into the air.

PREVENTION LIMITS

No routine vaccine or preventive drug

There is no routinely available vaccine or preventive drug for general hantavirus exposure. After substantial exposure, contact a healthcare professional or local public-health authority for individualized advice.

People working in pest control, agriculture, laboratories, construction, or healthcare should follow local safety protocols and use respiratory protection when recommended. Employers should provide appropriate training and equipment for tasks that may involve rodent contamination or aerosolized particles.

Affected Body System/Organ

Body Systems Affected by Hantavirus

The respiratory system and lungs are primarily affected in hantavirus pulmonary syndrome. The kidneys and circulatory system are primarily involved in hemorrhagic fever with renal syndrome.

Diseases & Conditions

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