Tissue culture technique for routine isolation of street strain rabies virus.

A tissue culture test for the primary isolation of street strain rabies virus from the brains of suspect animals was evaluated. It was found to be reliable and comparable in sensitivity to the standard mouse inoculation technique. The test, which yields final results in 48 h, was performed in BHK-21 cells on tissue culture chamber slides. The addition of diethylaminoethyl dextran to the cell suspension before seeding the slide promoted the subsequent viral invasiveness of positive test specimens. The method described may be considered as a substitute for the mouse inoculation test which is currently used as a backup to the fluorescent antibody test in the diagnosis of rabies.