WSU study finds hantavirus strain in rodents in PNW
Palouse, Idaho, United StatesConfidence 90%Jun 1, 2026
A Washington State University study found the Sin Nombre hantavirus strain to be widespread in rodent populations, including deer mice, voles, and chipmunks, in the Palouse region of Idaho and Washington.
Species mentioned
- rodents
- deer mice
- voles
- chipmunks
Source articles
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- PrimaryWSU study finds hantavirus strain in rodents in PNW
krem.com · 2026-06-01
A Washington State University (WSU) study revealed that the Sin Nombre virus, a type of hantavirus, may be more widespread among rodent populations in parts of the Pacific Northwest. The study found that nearly 30% of rodents in the Palouse region of Idaho and Washington showed signs of past infection, with 10% actively infected. Deer mice, voles, and chipmunks are vectors, and activities disturbing rodent nests increase exposure risk.
- ReferenceHantavirus exposure risk may be higher than believed in parts of US, study finds | FOX 5 DC
vertexaisearch.cloud.google.com · 2026-06-03
A study published in "Emerging Infectious Diseases" in 2026 found unexpectedly high levels of Sin Nombre virus (SNV) in rodent populations in the Pacific Northwest, specifically the Palouse region (eastern Washington and north-central Idaho). Nearly 30% of sampled rodents showed prior exposure, and about 10% had active infections, suggesting the risk of hantavirus exposure may be higher than previously thought in these agricultural and natural settings. The Sin Nombre virus, the most common hantavirus in the U.S., spreads through aerosolized rodent excretions and is not known for person-to-pe
- ReferenceHantavirus exposure risk may be higher than believed in parts of US, study finds
fox5dc.com · 2026-06-03
A new study from Washington State University found unexpectedly high levels of Sin Nombre virus in rodents in the Pacific Northwest, particularly the Palouse region (eastern Washington and north-central Idaho). Nearly 30% of sampled rodents showed prior exposure, suggesting the virus may be more widespread than previously thought. This highlights the importance of precautions against rodent contact, as Sin Nombre virus is typically spread through aerosolized rodent excretions.
Reminder
This report is an aggregated summary of public information for surveillance and awareness purposes only. It is not medical advice. For symptoms, exposure, or clinical decisions, contact a qualified clinician or your local public-health authority.