[Risk factors for clinical prognosis in bacterial meningitis beyond the neonatal period]

K Nagai1, Y Sakata

  • 1Department of Pediatrics, St. Mary's Hospital.

Insights

Bacterial meningitis in children beyond the neonatal period is often caused by Haemophilus influenzae and Streptococcus pneumoniae. Streptococcus pneumoniae infection led to worse outcomes compared to Haemophilus influenzae.

Area of Science:

  • Clinical Microbiology
  • Pediatric Infectious Diseases
  • Epidemiology

Background:

  • Bacterial meningitis remains a significant cause of morbidity and mortality in children.
  • Understanding common pathogens and prognostic factors is crucial for improving patient outcomes.
  • This study focuses on bacterial meningitis cases beyond the neonatal period.

Purpose of the Study:

  • To identify common bacterial pathogens causing meningitis in pediatric patients.
  • To analyze risk factors influencing the prognosis of bacterial meningitis.
  • To compare outcomes between different causative pathogens.

Main Methods:

  • Retrospective clinical study of 64 pediatric bacterial meningitis cases (1985-1995).
  • Data collected included patient demographics, causative pathogens, and clinical outcomes.
  • Statistical analysis was performed to identify prognostic factors and compare pathogen-specific outcomes.

Main Results:

  • Haemophilus influenzae (43.8%) and Streptococcus pneumoniae (35.9%) were the most frequent pathogens.
  • Prognosis outcomes included normal recovery (65.6%), neurological sequelae (26.6%), and death (7.8%).
  • Admission body temperature, platelet count, and CSF parameters (WBC, glucose, GOT, GPT) were significant prognostic factors.
  • Bacterial meningitis caused by S. pneumoniae had a significantly worse prognosis than that caused by H. influenzae (p = 0.0347).

Conclusions:

  • Haemophilus influenzae and Streptococcus pneumoniae are leading causes of bacterial meningitis in children beyond the neonatal period.
  • Clinical and laboratory parameters at admission are critical for predicting patient outcomes.
  • The causative pathogen significantly impacts prognosis, with S. pneumoniae associated with poorer outcomes.

Related Concept Videos

Bacterial Meningitis01:24

Bacterial Meningitis

Bacterial meningitis is a severe infectious disease involving inflammation of the meninges, the protective membranes surrounding the brain and spinal cord. It occurs when pathogenic bacteria cross the blood–brain barrier and enter the cerebrospinal fluid. Common causative organisms include Neisseria meningitidis, Streptococcus pneumoniae, Haemophilus influenzae type b, Listeria monocytogenes, and Escherichia coli K1. The exact route of entry varies by pathogen and host condition.Routes of Entry...
Viral Meningitis01:18

Viral Meningitis

Viral meningitis is the most common form of meningitis and is often referred to as aseptic meningitis to indicate the absence of bacterial involvement. It is generally milder than bacterial meningitis, with symptoms including fever, headache, stiff neck, drowsiness, nausea, photophobia, and vomiting. Rarely, more severe manifestations or death may occur. Common causative agents include enteroviruses, particularly coxsackie A and B viruses and echoviruses, all members of the Enterovirus genus...
Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Bacterial Meningitis I: Introduction01:22

Bacterial Meningitis I: Introduction

Bacterial meningitis is a severe, life-threatening inflammation of the meninges, particularly the pia mater and arachnoid mater, affecting the subarachnoid space, ventricles, and cerebrospinal fluid (CSF). If untreated, it can lead to significant neurological complications or death.Causative AgentsCommon pathogens vary with age and immune status. In adults, major organisms include Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae. Streptococcus agalactiae (group B...
Bacterial Meningitis II: Pathophysiology01:26

Bacterial Meningitis II: Pathophysiology

Bacterial meningitis typically begins when pathogens such as Neisseria meningitidis and Streptococcus pneumoniae colonize the nasopharynx and invade the bloodstream. This process is facilitated by bacterial virulence factors, such as polysaccharide capsules, which resist phagocytosis and complement-mediated killing. Less commonly, bacteria reach the central nervous system via contiguous spread from infections like otitis media or sinusitis, through congenital or acquired dural defects, or...
Pneumonia I: Introduction01:29

Pneumonia I: Introduction

Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...