title: Investigation for complement deficiency following meningococcal disease.
abstract: OBJECTIVE
  The incidence of complement abnormalities in the UK is not known. It is suggested in at least three major paediatric textbooks to test for abnormalities of the complement system following meningococcal disease (MCD).
  
  
  METHODS
  Over a four year period, surviving children with a diagnosis of MCD had complement activity assessed. A total of 297 children, aged 2 months to 16 years were screened.
  
  
  RESULTS
  All children except one had disease caused by B or C serogroups. One child, with group B meningococcal septicaemia (complicated by disseminated intravascular coagulation and who required ventilation and inotropic support) was complement deficient. C2 deficiency was subsequently diagnosed. She had other major pointers towards an immunological abnormality prior to her MCD.
  
  
  CONCLUSIONS
  It is unnecessary to screen all children routinely following MCD if caused by group B or C infection. However, it is important to assess the previous health of the child and to investigate appropriately if there have been previous suspicious infections, abnormal course of infective illnesses, or if this is a repeated episode of neisserial infection.
authors.affiliation: Paediatric Infectious Diseases Unit, Newcastle General Hospital, Newcastle upon Tyne, UK. simon.hoare@dial.pipex.com
authors.forename: S
authors.initials: S
authors.lastname: Hoare
authors.forename: O
authors.initials: O
authors.lastname: El-Shazali
authors.forename: J E
authors.initials: JE
authors.lastname: Clark
authors.forename: A
authors.initials: A
authors.lastname: Fay
authors.forename: A J
authors.initials: AJ
authors.lastname: Cant
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003175:Complement C2 / Q000172:deficiency; D003165:Complement System Proteins / Q000172:deficiency*; D004211:Disseminated Intravascular Coagulation / Q000209:etiology / Q000276:immunology / Q000628:therapy; D005260:Female; D006801:Humans; D008589:Meningococcal Infections / Q000150:complications* / Q000276:immunology; D011008:Pneumococcal Infections / Q000150:complications / Q000276:immunology; D011379:Prognosis
chemical_list: D003175:Complement C2; D003165:Complement System Proteins