Infection of astrocytes with a Pru strain of T. gondii that expressed Venus (a modified version of yellow fluorescent protein [YFP]) failed to induce STAT1 phosphorylation at 2 h (data not shown), but by 24 h, there was a modest induction of STAT1 phosphorylation in the total population of cells in these cultures. The gene discussed is STAT1; the disease is infection.