<prompt> A child patient comes to OPD with history of black central arch rashes on his body. What is your diagnosis?MeningococcemiaDengue hemorrhagic feverLeptospirosisScrub typhus  <response>: Ans. A. MeningococcemiaAcute meningococcemia In primary stage, it may mimic a viral disease nonspecific. Any organ of the body can be affected by vasculitis and thromboembolic disease. Black central arch and surrounding ring or erythema is the characteristic meningococcal rash and it is often seen before more serious signs develop.Rapid progression is seen in a fulminant case with disseminated intravascular coagulation, septic shock, adrenal hemorrhage, acidosis, and renal and heart failure. Petechiae and purpura - meningitis purpura fulminans DIC Emergency treatment: IV penicillin 