Viridans streptococcal bacteremia-related encephalopathy in childhood with malignancy

Yuya Sato1, Mayuko Okuya, Susumu Hagisawa

  • 1Department of Pediatrics, Dokkyo Medical University, Tochigi, Japan. syuya@dokkyomed.ac.jp

Insights

Viridans streptococcal bacteremia can cause serious brain complications like seizures in children with cancer. Prompt diagnosis and treatment are crucial for successful recovery without lasting effects.

Area of Science:

  • Pediatric Oncology
  • Infectious Diseases
  • Neurology

Background:

  • Viridans streptococcal bacteremia is a known risk factor in pediatric cancer patients with neutropenia.
  • Encephalopathy is a serious complication that can arise from this bacteremia.
  • This study focuses on the neurological impact of viridans streptococcal bacteremia in this vulnerable population.

Purpose of the Study:

  • To describe cases of viridans streptococcal bacteremia-related encephalopathy in pediatric cancer patients.
  • To highlight the clinical presentation, complications, and treatment outcomes.
  • To emphasize the importance of early diagnosis and intervention.

Main Methods:

  • Case series of 4 pediatric patients with malignancy and viridans streptococcal bacteremia-related encephalopathy.
  • Review of treatment protocols for brain edema and seizures, including antimicrobial therapy.
  • Comparison of C-reaction protein levels between patients with and without encephalopathy.

Main Results:

  • Four patients experienced severe complications including seizures and loss of consciousness due to viridans streptococcal bacteremia-related encephalopathy.
  • Rapid treatment with midazolam, dexamethasone, mannitol, and antimicrobials was successful without sequelae.
  • Patients with encephalopathy had a higher peak serum C-reaction protein level compared to those without.

Conclusions:

  • Viridans streptococcal bacteremia can induce encephalopathy in pediatric patients with malignancy.
  • Early and accurate diagnosis is critical for effective management.
  • Prompt initiation of appropriate therapy can lead to successful outcomes and prevent long-term complications.

Related Concept Videos

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...
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...
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...
Cryptococcal Meningitis01:27

Cryptococcal Meningitis

Cryptococcal meningitis is a life-threatening opportunistic infection predominantly associated with HIV/AIDS, accounting for over 100,000 deaths annually worldwide. However, it also affects individuals with other forms of immunosuppression, including those undergoing immunosuppressive therapy, organ transplant recipients, patients with innate immunodeficiencies, and individuals with hematological disorders. The infection is caused mainly by Cryptococcus neoformans and Cryptococcus gattii,...
Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...
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...