West Nile virus viremia in eastern chipmunks (Tamias striatus) sufficient for infecting different mosquitoes.

Abstract:

:In eastern chipmunks (Tamias striatus) inoculated intramuscularly with 101.5 to 105.7 PFU of West Nile virus (WNV), serum titers developed sufficient to infect Aedes triseriatus (Say), Ae. vexans (Meigen), and Culex pipiens (L.). Mean titers (95% confidence interval) of 8 chipmunks were 103.9(3.3-4.5), 106.7(6.4-7.0), and 105.8(4.1-7.5) PFU/mL on days 1-3 postinoculation (p.i.) and 105.8 PFU/mL in 1 chipmunk on day 4 p.i. Mean estimated days that WNV titers were >104.8 and >105.6 were 1.7 (1.1-2.3) and 1.4 (1.0-1.6). The longest period of viremia >104.8 PFU/mL was 3-4 days. WNV antigen was detected in the small intestine of 2 chipmunks and the kidneys of 4 chipmunks by immunohistochemistry. WNV also was detected in urine, saliva, and feces of some chipmunks. These data suggest chipmunks might play a role in enzootic WNV cycles and be an amplifying host for mosquitoes that could infect humans.

journal_name

Emerg Infect Dis

authors

Platt KB,Tucker BJ,Halbur PG,Tiawsirisup S,Blitvich BJ,Fabiosa FG,Bartholomay LC,Rowley WA

doi

10.3201/eid1306.061008

subject

Has Abstract

pub_date

2007-06-01 00:00:00

pages

831-7

issue

6

eissn

1080-6040

issn

1080-6059

journal_volume

13

pub_type

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