Related Experiment Video
Updated: Jun 17, 2026

Constructing Mutants in Serotype 1 Streptococcus pneumoniae strain 519/43
Published on: September 11, 2020
Late and ultra late onset Streptococcus B meningitis: clinical and bacteriological data over 6 years in France
1Department of Paediatric Intensive Care Unit, Trousseau's Hospital, Paris, France. julia.guilbert@trs.aphp.f
Insights
Group B Streptococcus (GBS) meningitis in infants presents differently based on onset. Ultra late onset disease (ULOD) is strongly linked to prematurity, unlike late onset disease (LOD).
Area of Science:
- Neonatal infectious diseases
- Pediatric neurology
- Bacteriology
Background:
- Group B Streptococcus (GBS) is a primary cause of neonatal sepsis and meningitis.
- Distinguishing between late onset disease (LOD) and ultra late onset disease (ULOD) in GBS meningitis is crucial for understanding disease progression.
Purpose of the Study:
- To characterize GBS meningitis in infants aged 7-89 days (LOD) and compare it with those over 3 months (ULOD).
- To identify potential differences in clinical presentation and risk factors between LOD and ULOD GBS meningitis.
Main Methods:
- Utilized data from the ACTIV/GPIP nationwide active surveillance network (2001-2006).
- Analyzed clinical and biological data of 242 children diagnosed with GBS meningitis (220 LOD, 22 ULOD).
Main Results:
- Infants in the ULOD group had significantly lower gestational age (35.6 weeks) compared to the LOD group (37.9 weeks).
- Early preterm birth (before 32 weeks GA) was more prevalent in the ULOD group (32%) versus the LOD group (7%).
- No significant differences were observed in lumbar puncture findings, GBS serotypes, complications, or survival rates between the groups.
Conclusions:
- Late onset disease (LOD) and ultra late onset disease (ULOD) appear to be similar clinical and bacteriological entities.
- Prematurity is a significant distinguishing factor associated with ultra late onset disease (ULOD) in GBS meningitis.
Background:
Group B Streptococcus (GBS) is one of the leading causes of sepsis and meningitis in newborn. The objective of this study was to describe the characteristics of GBS meningitis in children aged between 7 and 89 days (late onset disease - LOD group) and to compare them with children aged more than 3 months (ultra late onset disease - ULOD group).
Methods:
Clinical and biological data were gathered by ACTIV/GPIP (a nationwide active surveillance network). The study population included 242 children hospitalized between 2001 and 2006 for GBS meningitis (220 in the LOD group and 22 in the ULOD group).
Results:
Univariate analysis revealed that gestational age (GA) was significantly lower in the ULOD group as compared with the LOD group (respectively 35.6 weeks vs. 37.9 weeks, p = 0.002). Prevalence of early preterm birth (before the 32nd week GA) was significantly higher in the ULOD group than in the LOD group (32% vs. 7%, p = 0.002). No significant difference was found between the two groups for biological characteristics of lumbar puncture, GBS serotypes, complications and survival rate.
Conclusion:
These data suggest that LOD and ULOD would be the same clinical and bacteriological entity, except for prematurity, which seems significantly associated with ULOD.
Related Concept Videos
Bacterial Meningitis I: Introduction
Bacterial Meningitis II: Pathophysiology
Bacterial Meningitis
Streptococcal Pharyngitis
Rocky Mountain Spotted Fever
Clinical Significance of Antibiotic Resistance