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Trends Microbiol. 2007 May;15(5):233-40. Epub 2007 Mar 29.

Interactions between Neisseria meningitidis and the complement system.

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  • 1Centre for Molecular Microbiology and Infection, Department of Infectious Diseases, Flowers Building, Armstrong Road, Imperial College London, London, SW7 2AZ, UK.


Meningococcal infection remains a worldwide health problem, and understanding the mechanisms by which Neisseria meningitidis evades host innate and acquired immunity is crucial. The complement system is vital for protecting individuals against N. meningitidis. However, this pathogen has evolved several mechanisms to avoid killing by human complement. Bacterial structures such as polysaccharide capsule and those which mimic or bind host molecules function to prevent complement-mediated lysis and phagocytosis. This review provides an update on the recent findings on the diverse mechanisms by which N. meningitidis avoids complement-mediated killing, and how polymorphisms in genes encoding human complement proteins affect susceptibility to this important human pathogen.

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