Which of the following viruses is an RNA virus that affects laboratory rodents?

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Multiple Choice

Which of the following viruses is an RNA virus that affects laboratory rodents?

Explanation:
RNA viruses carry their genome as RNA, and Theiler's murine encephalomyelitis virus fits that pattern. It is a single-stranded positive-sense RNA virus in the Picornaviridae family that infects mice and can cause demyelinating disease, making it a notable RNA virus affecting laboratory rodents. The other listed viruses are DNA viruses—SV40 and Polyomavirus are polyomaviruses with double-stranded DNA genomes, and Herpesvirus simiae is a herpesvirus with a double-stranded DNA genome.

RNA viruses carry their genome as RNA, and Theiler's murine encephalomyelitis virus fits that pattern. It is a single-stranded positive-sense RNA virus in the Picornaviridae family that infects mice and can cause demyelinating disease, making it a notable RNA virus affecting laboratory rodents. The other listed viruses are DNA viruses—SV40 and Polyomavirus are polyomaviruses with double-stranded DNA genomes, and Herpesvirus simiae is a herpesvirus with a double-stranded DNA genome.

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