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Meningococcal disease.

Ziad A Memish1, Abdulrahman A Alrajhi

  • 1Department of Medicine and Infection Prevention and Control, King Fahad National Guard Hospital, Riyadh, Kingdom of Saudi Arabia.

Saudi Medical Journal
|April 9, 2002
PubMed
Summary

Meningococcal disease, caused by Neisseria meningitidis, remains a significant threat globally. Updated vaccination strategies, including quadrivalent vaccines, are crucial for controlling outbreaks and reducing mortality.

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Area of Science:

  • Epidemiology
  • Infectious Diseases
  • Vaccinology

Background:

  • Meningococcal disease causes significant global morbidity and mortality.
  • Serogroups A, B, and C of Neisseria meningitidis are responsible for 90% of cases.
  • Recent epidemiological shifts show increased prevalence of serogroups C, Y, and W135 in various regions.

Purpose of the Study:

  • To highlight the changing epidemiology of meningococcal disease.
  • To discuss the impact of Neisseria meningitidis serogroup W135 outbreaks in Saudi Arabia.
  • To review current and developing prevention and treatment strategies for meningococcal disease.

Main Methods:

  • Review of epidemiological data on Neisseria meningitidis serogroups.
  • Analysis of outbreak investigations, particularly during Hajj seasons.
  • Evaluation of vaccine requirements and treatment protocols.

Main Results:

  • Neisseria meningitidis serogroup W135 emergence led to major outbreaks in Saudi Arabia during Hajj.
  • Vaccine requirements in Saudi Arabia were updated to include quadrivalent meningococcal vaccines (A, C, Y, W135).
  • Meningococcal disease continues to have a high mortality rate (5-10%) despite advances.

Conclusions:

  • Targeted vaccination based on disease epidemiology is essential.
  • Rapid chemoprophylaxis for close contacts is a key preventive measure.
  • Development of new conjugate vaccines, including quadrivalent options, is ongoing and critical for future control.

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