Abstract
Aedes aegypti mosquitoes were inoculated intrathoracically with prototype Sindbis virus, held at 26.7°C for from 0–95 h and placed at −70°C. Individual mosquitoes were tested for virus by plaque assay in Vero cells, for viral RNA by nucleic acid hybridization using a cloned cDNA probe, and for viral protein by enzyme-linked immunosorbent assay. Virus was detected by plaque assay as early as 8 h after infection. Sindbis virus RNA was detected by nucleic acid hybridization 18 h after infection and by enzyme-linked immunosorbent assay 10 h after infection. The results of these comparisons suggest that both nucleic acid hybridization and enzyme-linked immunosorbent assay are applicable to direct detection of Sindbis virus in mosquitoes containing virus at levels usually found during arbovirus epidemics.
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