CDC Journal Study Finds High Hantavirus Rates In Northwest Rodents
Researchers published a 2026 study in the CDC journal Emerging Infectious Diseases that found high hantavirus exposure and active infections among rodents in the Palouse of eastern Washington and north-central Idaho.[1]
Researchers sampled 189 rodents in summer 2023 at eight farms and two forest sites across the Palouse.[1] Nearly 30% showed evidence of prior hantavirus exposure and about 10% carried active Sin Nombre virus infections.[1] Infections were detected in several rodent species and in both agricultural and natural environments.[1]
The results were published in 2026 in Emerging Infectious Diseases, a peer-reviewed CDC journal.[1] The paper's authors and reporting note the findings suggest hantavirus exposure risk may be higher than previously believed in parts of the United States.[1]
Because infections appeared on farms and in forests and across multiple species, the study says surveillance and prevention efforts in the region may need reevaluation.[1]
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📌 Key Facts
- Study area was the Palouse region, spanning parts of eastern Washington and north-central Idaho.
- Researchers sampled 189 rodents in summer 2023 at eight farms and two forest sites.
- Nearly 30% of rodents had evidence of prior hantavirus exposure and about 10% had active Sin Nombre virus infections.
- Results were published in 2026 in Emerging Infectious Diseases, a peer-reviewed CDC journal.
- Infections were detected in multiple rodent species, not just deer mice, and in both agricultural and natural environments.
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