Sites of clearance of leucocyte pyrogen in the rabbit.

1. The dose-response curve for sustained infusions of leucocyte pyrogen has been demonstrated, and an optimum dose indicated for leucocyte pyrogen clearance experiments. 2. The lungs, liver and small bowel are not significantly involved in removal of leucocyte pyrogen from the circulation in conscious rabbits. 3. A single circulation through one kidney removes up to half of the infused dose of leucocyte pyrogen.