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Published on: November 5, 2019
Multicenter surveillance of invasive meningococcal infections in children
Sheldon L Kaplan1, Gordon E Schutze, John A D Leake
1Pediatric Infectious Diseases Section, Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA. skaplan@bcm.tmc.edu
Insights
Meningococcal disease remains a significant threat to children, with serogroup B being most common. Post-vaccination surveillance is crucial to assess the impact of new meningococcal conjugate vaccines.
Area of Science:
- Pediatric infectious diseases
- Epidemiology
- Vaccinology
Background:
- Meningococcal disease causes significant childhood illness and death in the U.S.
- Recent surveillance data on serogroup distribution and outcomes in children is limited.
Purpose of the Study:
- To gather comprehensive data on pediatric Neisseria meningitidis infections.
- To collect demographic, clinical, laboratory, and outcome information for children with various serogroups.
Main Methods:
- Multi-center study involving 10 pediatric hospitals.
- Standardized data collection for clinical and demographic information.
- Centralized laboratory analysis for serogrouping and antibiotic susceptibility.
Main Results:
- 159 episodes of invasive meningococcal disease identified between 2001-2005.
- Serogroup B (44%) was most prevalent, followed by C (26%) and Y (22%).
- Mortality was 8% overall, higher in older children (>11 years). Hearing loss occurred in 12.5% of meningitis cases.
Conclusions:
- Meningococcal infections lead to substantial morbidity and mortality in children.
- Establishment of baseline disease trends is vital for evaluating the effectiveness of meningococcal conjugate vaccines.
Objectives:
Meningococcal disease continues to result in substantial morbidity and mortality in children, but there is limited recent surveillance information regarding serogroup distribution and outcome in children in the United States. The objective of this study was to collect demographic, clinical, laboratory, and outcome information for infants and children who had Neisseria meningitidis infections of various serogroups and were cared for in 10 pediatric hospitals.
Methods:
Investigators at each of the participating hospitals identified children with meningococcal infections and collected demographic and clinical information using a standard data form. Meningococcal isolates were sent to a central laboratory for serogrouping by slide agglutination and penicillin susceptibility.
Results:
From January 1, 2001, through March 15, 2005, 159 episodes of systemic meningococcal infections were detected. The greatest numbers of children were younger than 12 months (n = 41) or were 12 to 24 months of age (n = 22). Meningitis was the most common clinical manifestation of disease accounting for 112 (70%) cases; 43 (27%) children had bacteremia only. Children who were younger than 5 years (17 of 102) were significantly less likely to require mechanical ventilation than children who were 5 to 10 years of age (12 of 24) or children who were older than 10 years (13 of 33). Overall, 55 (44%) isolates were serogroup B, 32 (26%) were serogroup C, and 27 (22%) were serogroup Y. All but 1 isolate (intermediate) were susceptible to penicillin. The overall mortality rate was 8% (13 of 159) but was greater for children who were > or = 11 years of age (7 [21.2%] of 33) than for children who were younger than 11 years (6 [4.8%] of 126). Unilateral or bilateral hearing loss occurred in 14 (12.5%) of 112 children with meningitis.
Conclusions:
The morbidity and the mortality of meningococcal infections are substantial. With the recent licensure of meningococcal conjugate vaccines, our baseline trends in meningococcal disease can be compared with those seen after widespread vaccination to assess the success of routine immunization.
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