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West Nile virus (WNV) is a mosquito-borne flavivirus that infects the central nervous system of humans and other animals. In this study, we found that C3H/HeN (C3H) mice exhibited a higher morbidity and mortality than C57BL/6 (B6) mice. We compared tissue tropism, viral replication and kinetics for C3H and B6 mice during acute viral infection. WNV was detected in multiple tissues, including novel...
Immune responses to virus infection undergo significant change as part of the aging process. Here we examine the inflammatory responses of older, but otherwise immunologically naive mice to infection with pneumonia virus of mice (PVM). Although we see no changes in the extent or kinetics of virus replication, we observe diminished local production of inflammatory mediators, including MIP-1α, JE/MCP-1,...
An adaptive mutation (E249G) within West Nile virus (WNV) NS4B gene was consistently recovered from replicon RNAs in C3H/He mouse cells. The E249G is located at the C-terminal tail of NS4B predicted to be on the cytoplasmic side of the endoplasmic reticulum membrane. The E249G substitution reduced replicon RNA synthesis. Compared with the wild-type NS4B, the E249G mutant protein exhibited a similar...
We explore relationships linking clinical symptoms, respiratory dysfunction, and local production of proinflammatory chemokines in the pneumonia virus of mice (PVM) model of viral bronchiolitis. With a reduced inoculum of this natural rodent pathogen, we observe virus clearance by day 9, while clinical symptoms and respiratory dysfunction persist through days 14 and 17 postinoculation, respectively...
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