Aseptic meningitis in infants < 2 years of age: diagnosis and etiology

L E Berlin1, M L Rorabaugh, F Heldrich

  • 1Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland.

Insights

Group B coxsackieviruses and echoviruses are the primary causes of aseptic meningitis in young children. A small number of enterovirus serotypes are responsible for the majority of these infections.

Area of Science:

  • Pediatric Infectious Diseases
  • Virology
  • Epidemiology

Background:

  • Aseptic meningitis is a significant cause of illness in infants and young children.
  • Enteroviruses are a common cause of viral meningitis, but their specific contributions vary.
  • Understanding the etiological agents is crucial for diagnosis and prevention.

Purpose of the Study:

  • To determine the relative contribution of different enterovirus classes to aseptic meningitis in children under 24 months old.
  • To identify specific enterovirus serotypes most frequently associated with aseptic meningitis in this age group.

Main Methods:

  • Prospective study of aseptic meningitis cases in children < 24 months old.
  • Virus isolation using cell culture and newborn mice.
  • Serologic tests for viral pathogen identification.

Main Results:

  • Enteroviruses were identified in 60% of 274 cases.
  • Group B coxsackieviruses and echoviruses accounted for 92% of laboratory-diagnosed cases.
  • Eight specific enterovirus serotypes were responsible for 78% of all cases, with serotypes B2, B4, and B5 being most common.

Conclusions:

  • Group B coxsackieviruses and echoviruses are the predominant enteroviruses causing aseptic meningitis in young children.
  • A limited number of enterovirus serotypes are responsible for the majority of infections, highlighting potential targets for surveillance and intervention.

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...
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...
Encephalitis l: Introduction01:19

Encephalitis l: Introduction

Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...
Brain Abscess l: Introduction01:26

Brain Abscess l: Introduction

A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial infections,...