Our data provide evidence that a booster dose of oral BCG did not significantly enhance IFN-γ responses in this population overall (104.5% change in IFN-γ-expressing cell frequencies) but this effect did not appear to be associated with ascariasis because neither short nor long-term repeated treatments with albendazole had any significant effect on IFN-γ responses. The gene discussed is IFNG; the disease is ascariasis.