IL2 treatment (recombinant human IL2, rhIL2, Proleukin®, Novartis) was started on day 3 after bacterial inoculation on day 0. C57BL/6 mice (n = 9) were treated with ip injections of 25.000 IU/day/mouse [28 (link)] of rhIL2 in a total volume of 100 μl of phosphate-buffered saline (PBS) until the end of the experiment on day 10. Mice in the control group (n = 9) were injected with PBS.
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