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Volume 32, Number 1—January 2026

Dispatch

Genomic Analysis of Sin Nombre Virus Sequences, Northwestern United States, 2023

Grant Rickard1, Ricardo Rivero1, A. Catherine Grady, Jennifer Horton, Cody J. Lauritsen, Stephen Fawcett, Samuel M. Goodfellow, Hanna N. Oltean, M. Pilar Fernandez, and Stephanie N. SeifertComments to Author 
Author affiliation: University of Washington School of Medicine, Seattle, Washington, USA (G. Rickard); Washington State University Paul G. Allen School for Global Health, Pullman, Washington, USA (G. Rickard, R. Rivero, A.C. Grady, J. Horton, C.J. Lauritsen, S. Fawcett, M.P. Fernandez, S.N. Seifert); Children’s Hospital Los Angeles, Los Angeles, California, USA (S.M. Goodfellow); Washington State Department of Health Zoonotic and Vector-borne Disease Program, Tumwater, Washington (H.N. Oltean)

Main Article

Table

Serologic and quantitative reverse transcription PCR results for Sin Nombre virus in rodent species sampled from farm sites and natural sites, Palouse region, eastern Washington and western Idaho, USA, 2023*

Site and species Age category/sex Sample type, no. (%)
Blood Lung Bladder Fecal
Farm site
Western meadow vole (Microtus drummondii) Adult/F ND 0/1 0/1 0/1
Adult/M 1/1 0/2 0/1 0/1
Juvenile/M 0/1 ND 0/1 0/1
Total 1/2 (50) 0/3 0/3 0/3
Montane vole (Microtus montanus) Adult/F 0/2 0/2 0/2 0/4
Adult/M 3/3 1/3 0/3 0/5
Juvenile/F 0/1 0/1 0/1 0/4
Juvenile/M 1/2 1/3 0/3 0/4
Total 4/8 (50) 2/9 (22) 0/9 0/17
Creeping vole (Microtus oregonii) Juvenile/F ND 0/1 0/1 0/1
Juvenile/M 0/1 0/1 0/1 0/1
Total 0/1 0/2 0/2 0/2
House mouse (Mus musculus) Adult/M ND ND ND 0/1
Juvenile/F ND ND ND 0/1
Total ND ND ND 0/2
Yellow-pine chipmunk (Neotamias amoenus) Adult/F ND ND ND 0/1
Least chipmunk (Neotamias minimus) Adult/F 0/1 0/1 0/1 0/2
Adult/M ND ND ND 0/1
Juvenile/F 0/1 0/1 0/1 0/1
Juvenile/M 1/2 0/1 0/2 0/3
Total 1/4 (25) 0/3 0/4 0/7
Western deer mouse (Peromyscus sonoriensis)
 Adult/F 5/25 1/27 0/27 0/35
Adult/M 11/28 7/28 2/27 0/35
Juvenile/F 6/15 0/16 0/16 0/24
Juvenile/M 2/14 1/14 0/14 0/15
Total
 24/82 (29)
 9/85 (11)
 2/84 (2)
 0/109
Natural site
Montane vole (Microtus montanus) Adult/F ND 0/1 0/1 0/1
Least chipmunk (Neotamias minimus) Adult/F 0/1 0/1 0/1 0/1
Adult/M 0/1 0/1 0/1 0/1
Total 0/2 0/2 0/2 0/2
Western deer mouse (Peromyscus sonoriensis) Adult/F 2/8 0/10 0/10 0/12
Adult/M 3/9 2/11 0/11 0/14
Juvenile/F 0/7 0/7 0/7 0/8
Juvenile/M 1/10 0/10 0/10 0/10
Total 6/34 (18) 2/38 (5) 0/38 0/44

Main Article

1These first authors contributed equally to this article.

Page created: March 25, 2026
Page updated: April 27, 2026
Page reviewed: April 27, 2026
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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