| characterization of avian paramyxoviruses isolated from feral ducks in northern japan: the presence of three distinct viruses in nature. | seventy-eight strains of avian paramyxoviruses (pmv) were isolated from cloacal and/or tracheal swabs taken from 1,342 feral ducks, comprised of spot-bill ducks, mallards, pintails, teals, falcated teals, wigeons and buffle-heads, in wakuya-cho, miyagi prefecture, japan, between 1976 and 1979. five and a half percent of the ducks were positive for virus. serological and structural characterization indicated that three different avian paramyxoviruses are prevalent in the japanese feral duck popul ... | 1982 | 7132788 |