Characteristics of Murayama virus in various cell cultures and laboratory animals.
1981
Some biological properties of Murayama virus, a new paramyxovirus, were studied. The virus grew well in primary monkey kidney cells as well as embryonated eggs, while the virus yields in primary chick embryo and BHK-21 cells were much lower. The infected BHK-21 cells formed large syncytia and showed typical hemadsorption, but did not produce any detectable amount of hemagglutinin in the culture fluid. The virus yields were very low in Vero. LLC-MK2 and MDCK cells at first passages. The addition of trypsin to the medium enhanced virus growth in Vero and LLC-MK2 but not in MDCK cells. Cell fusion activity of the virus was observed in Molt-4 cells. Hemolytic activity was enhanced by freeze-thawing. Several species of mammals and birds were susceptible to experimental infections with the virus as evidenced by seroconversion and positive virus isolation without showing any clinical signs.
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