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Appl Environ Microbiol. 1981 March; 41(3): 652-656

Enhancement of varicella-zoster virus replication in cultured human embryonic lung cells treated with the pesticide carbaryl.

ABSTRACT

In studies designed to determine the factors responsible for control of herpesvirus replicaton in an infected cell, we examined the interaction of varicella-zoster (VZ) virus-infected human embryonic lung cells with the pesticide carbaryl. The replication of the cell-associated VZ virus was enhanced 2- to 13-fold as compared to control cultures in Sevin 4 Oil-treated cultures and in cultures treated with the pesticide's active ingredient, carbaryl. The replication of VZ virus in cultures teated with the base oil plus inert ingredients found in the pesticide formulation was not enhanced. Possible differences in cytotoxicity induced by Seven 4 Oil, pure carbaryl, or the base oil preparation were ruled out since treated and control cultures were shown to have similar numbers of viable cells when measured by trypan blue exclusion tests or by the ability of treated cells to form foci. A dose response study showed a decrease in viral enhancement in cells treated with decreasing carbaryl concentrations.