In comparison to wild-type herpesvirus saimiri, viral interleukin-17 g
ene knockout mutants have unaltered behavior regarding viral replicati
on, T-cell transformation in vitro, and pathogenicity in cottontop tam
arins. Thus, this gene is not required for T-cell lymphoma induction b
ut may contribute to apathogenic viral persistence in the natural host
, the squirrel monkey.