Abstract
The dye trypan blue inhibits infection of cells in tissue culture by measles and herpes simplex viruses at concentrations in excess of 0.01% (w/v) principally by direct inactivation of the virions. The inactivation is temperature-dependent (10(4) times greater at 37 degrees C than at 4 degrees C) and its mechanism appears to include inhibition of virus adsorption to cells.