CD1D and infection: To determine the relative roles of iNKT cells and type II NKT cells during experimental VL, we infected C57BL/6 mice deficient in iNKT cells only (B6.Jα18−/−) and all CD1d-restricted NKT cells (B6.CD1d−/−) with L. donovani and compared their course of infection to C57BL/6 controls.