<prompt> The most likely candidate responsible for the production of overwhelming septicemic shock complicating bacteremia with Neisseria meningitidis is:Capsular polysaccharidePiliLipopolysaccharide and outer MembraneLow-molecular-weight outer membrane proteins  <response>: Neisseria meningitidis is a gram-negative pathogen that causes 20 of meningitis cases, the second most common cause of the disease. Bacteremia produced by this organism meningococcemia is characterized by high fever, hemorrhagic rashes petechiae often culminating in disseminated intravascular coagulation, and circulatory collapse Waterhouse-Friderichsen syndrome. Meningitis is the most common complication of meningococcemia. The endotoxin lipopolysaccharide associated with the outer membrane of the cell wall of this organism is responsible for these symptoms. Capsular polysaccharides and outer membrane proteins are useful antigenic markers for the classification of this organism but do not contribute to the development of septicemic shock. Ref: Ray C.G., Ryan K.J. 2010. Chapter 30. Neisseria. In C.G. Ray, K.J. Ryan Eds,Sherris Medical Microbiology, 5e. 