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J Virol. 1973 August; 12(2): 275-283
Copyright © 1973 American Society for Microbiology. All Rights Reserved.

Replication of Dengue Virus Type 2 in Aedes albopictus Cell Culture

Pantipa Sinarachatanant and Lloyd C. Olson

Department of Microbiology, Faculty of Science, Mahidol University, and The Rockefeller Foundation, Bangkok, Thailand

ABSTRACT

The replication of type 2 dengue (D-2) virus in Aedes albopictus (Aal) mosquito cell cultures differed from that in vertebrate (LLC-MK2) rhesus monkey kidney cells. Virus readily replicated in Aal cells at either 30 or 37 C, but had no apparent effect on the host cell. Persistent infection was established with continual virus production for at least 6 months, although the virulence of progeny virus for both suckling mice and LLC-MK2 cells became attenuated. Density gradient analysis of infected Aal cell supernatant products indicated that only complete virus was released, in contrast to infected LLC-MK2 cells which also released incomplete virus. The surface antigens of the virus produced in Aal cells appeared to be considerably modified in that antiserum to vertebrate cell-produced D-2 virus did not block hemagglutination, whereas anti-Aal cell antiserum did. Virus infectivity could be neutralized by the antiserum to D-2 virus grown in vertebrate cells, however. Virus produced in LLC-MK2 cells did not demonstrate a similar host-cell modification. These results may reflect a difference in the mechanism by which D-2 virus matures in Aal cells.

J Virol. 1973 August; 12(2): 275-283
Copyright © 1973 American Society for Microbiology. All Rights Reserved.



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