<prompt> Waterhouse -Friderichsen syndrome is caused by which of the following organisms?Streptococcus PyogenesNeisseria MeningitidisClostridium PerfringensStaphylococcus Aureus  <response>: Also called as fulminant meningococcemia. It is a fatal condition characterised with shock, DIC, multisystem failure. Ref: Ananthanarayan and Panickers, 8th Edition, Page 225 