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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,...
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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...
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A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
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A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
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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...

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Modeling Posthemorrhagic Hydrocephalus of Prematurity in Rats
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Infected subdural hematoma in an infant.

Takayuki Hoshina1, Koichi Kusuhara, Mitsumasa Saito

  • 1Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan. hoshina@pediatr.med.kyushu-u.ac.jp

Japanese Journal of Infectious Diseases
|September 23, 2008
PubMed
Summary

Infected subdural hematoma in a child caused by Streptococcus pneumoniae requires careful diagnosis. Combining latex agglutination and PCR aids in identifying the specific bacteria.

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Area of Science:

  • Pediatric Infectious Diseases
  • Neuroscience
  • Microbiology

Background:

  • Subdural hematomas can become infected, posing a significant risk in pediatric patients.
  • Distinguishing between subdural empyema and infected subdural hematoma is crucial for appropriate treatment.
  • Streptococcus pneumoniae is a common pathogen in pediatric infections.

Observation:

  • A case study of a 1-year-old boy presenting with symptoms suggestive of subdural empyema.
  • Clinical presentation indicated a complex intracranial infection requiring precise etiological identification.

Findings:

  • Infected subdural hematoma was diagnosed in the patient.
  • Streptococcus pneumoniae was identified as the causative agent using both latex agglutination test and polymerase chain reaction (PCR).
  • PCR amplification of a bacteria-specific gene provided definitive identification.

Implications:

  • Infected subdural hematoma should be considered in the differential diagnosis of suspected subdural empyema in children.
  • The combination of latex agglutination and PCR offers a robust approach for identifying the causative organism in such cases.
  • Accurate and timely diagnosis is essential for effective management and improved patient outcomes.