F-MuLV load in DEREG mice infected with F-MuLV and depleted for Tregs. F-MuLV-infected DEREG mice were treated with DT to deplete Foxp3+ Treg during the first 10 days of infection (white columns). Control DEREG mice were infected but received PBS instead of DT (black columns). Viral loads were measured in the spleen of the 10 days infected mice. Each column represents mean numbers plus SEM per one million nucleated cells. Data was pooled from two independent experiments with similar results. Differences between the groups were analyzed by an unpaired t-test. A statistically significant difference between the groups was not found (P = 0.19).