| molecular characterization of three novel murine noroviruses. | murine noroviruses (mnv) comprise a group of newly recognized pathogens infecting laboratory mice. the first reported murine norovirus, murine norovirus 1 (mnv-1), produces a transient infection with a short duration of fecal shedding after infection of immunocompetent laboratory mice. our laboratory subsequently isolated three novel murine noroviruses, murine norovirus 2 (mnv-2), murine norovirus 3 (mnv-3), and murine norovirus 4 (mnv-4), that have markedly different pathogenicity from mnv-1 by ... | 2007 | 17171545 |