Purpura fulminans (PF) is a rare life-threatening infectious disease characterized by the association of a sudden and extensive purpura together with acute circulatory failure. The mortality of PF has been reported to be as high as 50% in previous adult series. Additionally, patients surviving to the early phase of PF are exposed to a high risk of limb amputation. The hOPeFUL study aims at assessing the short and long term outcomes of adult patients admitted in the intensive care unit for a purpura fulminans.