Hantaviruses are rodent-borne viruses that can cause severe, potentially fatal disease in humans. Infections are rare but serious, with no specific treatment or vaccine available.
What Is Hantavirus?
New World strains (Americas): Cause Hantavirus Pulmonary Syndrome (HPS) — severe lung and heart issues.
Old World strains (Europe/Asia): Cause Hemorrhagic Fever with Renal Syndrome (HFRS) — kidney and bleeding problems.
Carried by rodents (especially deer mice) that shed the virus in urine, droppings, and saliva. Humans are accidental hosts. In the U.S., Sin Nombre virus (via deer mice) is the main culprit.
How It Spreads
Primarily by inhaling aerosolized virus from disturbed rodent droppings, urine, or nests (cleaning sheds, cabins, garages).
Less common: rodent bites, direct contact with waste.
Person-to-person transmission is very rare (only certain South American strains).
Symptoms
Incubation: 1–8 weeks.
Early (3–5 days): Fever, fatigue, muscle aches, headache, dizziness, nausea. (Often no runny nose/sore throat.)
Severe phase: Rapid shortness of breath, fluid in lungs, low blood pressure, and possible respiratory failure (HPS) or kidney failure (HFRS).
Seek immediate medical care if flu-like symptoms follow rodent exposure.
Diagnosis & Treatment
Based on symptoms, exposure history, and lab tests.
Supportive care only: Oxygen, ventilation, ICU support. Early treatment improves survival.
Fatality rate for HPS: ~30–50% in severe cases.
Prevention
(Most Important)Seal homes against rodents.
Use snap traps; maintain cleanliness and food storage.
Safe cleaning: Ventilate, wear N95 mask + gloves, wet droppings with bleach solution before wiping (never sweep/vacuum dry material).
Avoid sleeping on ground in rodent-prone areas.
Key Takeaway
Hantavirus is preventable through rodent control and careful cleaning. Most cases occur in rural or wilderness settings. If you suspect exposure, contact a doctor right away.
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