Development of a broadly reactive nested reverse transcription‐PCR assay to detect murine noroviruses, and investigation of the prevalence of murine noroviruses in laboratory mice in Japan

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Abstract
A broadly reactive nested RT-PCR assay to detect MNV was developed and subsequently used to investigate the prevalence of MNV in laboratory mice in Japan. MNV were detected in 8 (22%) of 37 murine stool specimens by second-round PCR, although no positive band was obtained from any specimen by first-round PCR. Genetic analysis of the second round PCR products showed that MNV sequences detected in this study were closely matched (97.2 approximately 99.1%) to that of MNV-3 (DQ223042). This is the first report demonstrating the prevalence of MNV in Japan.

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