<prompt> Waterhouse friederichsen syndrome is caused byNeisseria gonorrheaeNeisseria meningitidisChlamydia trachomatisLymphogranuloma venerum  <response>: Waterhouse friederichsen WF syndrome is fulminant meningococcemia characterized by shock, disseminated intravascular coagulation, petechial rash and multisystem failure due to the lipo-oligosaccharide mediated damage of the vascular endothelium. it is caused by N.meningitidis 