The origin and past demography of murine astrovirus 1 in laboratory mice.

The Journal of General Virology
Chia-Ming SuCho-Hua Wan

Abstract

Astroviruses are non-enveloped, positive-sense, ssRNA viruses and often associated with gastrointestinal diseases. Murine astrovirus (MuAstV) was first confirmed in a laboratory mouse colony in 2011. Although infected mice do not present significant clinical symptoms, the virus might interfere with research results. A recent surveillance has shown that MuAstV is highly prevalent in laboratory mice. The aims of the present study were to identify and characterize MuAstV strains as well as to investigate the prevalence rate of viral RNA in laboratory mice in Taiwan, and to estimate the origin and past population demography of MuAstVs. Based on molecular surveillance, MuAstV RNA was detected in 45.7 % of laboratory mice (48/105) from seven of nine colonies. Three fully sequenced MuAstV strains, MuAstV TW1, TW2 and TW3, exhibited 89.1-94.4 % and 89.1-90.0 % nucleotide identities with the reference strains MuAstV STL1 and STL2, respectively. Phylogenetic analyses of the partial regions of the RNA-dependent RNA polymerase (RdRp) and capsid protein (CP) genes of 18 Taiwan strains along with other astroviruses revealed that there are three distinct lineages of mouse astrovirus, MuAstV1, MuAstV2 and mouse astrovirus JF755422. The mutatio...Continue Reading

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Citations

Jul 3, 2021·Viruses·Shanley N Roach, Ryan A Langlois

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