Wildflowers bloom in the Sierra Nevada
Wildflowers bloom in the Sierra Nevada

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Hantavirus Survey Data

The Vector-Borne Disease Prevention Program (VBDPP) staff periodically trap and tested rodents in various locations throughout Washoe County for hantavirus to determine areas of high risk. The following table shows the results of these surveys for 2002, 2003, 2004, and 2010:

Hantavirus Survey Data, 2002 - 2004, 2010
Year Species Common Name Number positive Number Tested Percent Positive
2002 Peromyscus maniculatus Deer mouse 10 30 30.0
2002 Reithrodontomys megalotis Harvest mouse 0 3 0.0
2002 Peromyscus crinitus Canyon Mouse 3 8 37.5
2002 Neotoma lepida Desert woodrat 0 1 0.0
2003 Peromyscus maniculatus Deer mouse 1 8 12.5
2003 Peromyscus crinitus Canyon Mouse 0 1 0.0
2003 Mus musculus House Mouse 0 3 0.0
2003 Reithrodontomys megalotis Harvest mouse 0 2 0.0
2004 Peromyscus maniculatus Deer mouse 4 12 33.3
2004 Tamias speciosus Lodgepole Chipmunk 0 1 0.0
2010 Ammospermophilus leucurus Antelope Squirrel 2 4 50.0
2010 Microtus spp. Vole 1 3 33.3
2010 Mus musculus House Mouse 0 1 0.0
2010 Neotoma cinerea Bushy-tailed Woodrat 0 3 0.0
2010 Neotoma lepida Desert Woodrat 0 1 0.0
2010 Peromyscus boylii Brush Mouse 0 2 0.0
2010 Peromyscus maniculatus Deer Mouse 20 97 20.6
2010 Reithrodontomys megalotis Harvest Mouse 1 5 20.0
2010 Spermophilus beecheyi California Ground Squirrel 0 1 0.0
2010 Spermophilus lateralis Golden-Mantled Ground Squirrel 0 7 0.0
2010 Tamias amoenus Yellow-Pine Chipmunk 0 10 0.0
2010 Tamias minimus Least Chipmunk 0 17 0.0

Hantavirus (Sin Nombre virus) Testing

VBDPP staff no longer conducts routine surveillance for this virus, but will investigate cases of human illness.