An assessment of common marmoset (Callithrix jacchus) γ9+ T cells and their response to phosphoantigen in vitro

► Marmoset γ9 T cells are distributed throughout the tissues. ► Marmoset γ9 T cells and human γ9δ2 T cell responses to phosphoantigen are comparable. ► γ9δ2 T cells expand in response to heat-killed Burkholderia pseudomallei. ► Phosphoantigen treatment of human and marmoset cells reduces B. pseudomallei growth. ► Marmoset is a suitable model for testing phosphoantigen immunotherapy.