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Frequency analysis of cytolytic T lymphocyte precursors (CTL‐P) generated in vivo during lethal rabies infection of mice. II. Rabies virus genus specificity of CTL‐P

Cytolytic T lymphocyte precursors (CTL‐P) were sensitized in vivo by intraplantar infection of C57BL/6 mice with a lethal dose of rabies virus, strain ERA (ERA). As a result of sensitization CTL‐P matured to interleukin‐receptive CTL‐P (IL‐CTL‐P) that could be expanded in vitro to Thy‐1+, Lyt‐2+ CTL clones in the presence of IL without subjection to antigen‐driven selection. After infection with ERA, IL‐CTL‐P‐derived CTL lysed fibroblasts infected with rabies virus but not those infected with another rhabdovirus, the vesicular stomatitis virus. These CTL, however, did not discriminate between fibroblasts infected with the serologically closely related laboratory strains of classic rabies virus, ERA and HEP‐Flury, and the serologically distinct rabies‐related African isolate Mokola. This finding implies that in vivo sensitized IL‐CTL‐P recognize common genus‐specific determinants expressed on cells infected with members of the lyssavirus genus.