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Related Concept Videos

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,...
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...
Hepatic Encephalopathy01:29

Hepatic Encephalopathy

DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic shunting—including...
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...
Diversity of Protists IV01:27

Diversity of Protists IV

Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...

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Updated: May 10, 2026

Analysis of the Epithelial Damage Produced by Entamoeba histolytica Infection
11:49

Analysis of the Epithelial Damage Produced by Entamoeba histolytica Infection

Published on: June 12, 2014

Entamoeba histolytica brain abscess.

William A Petri1, Rashidul Haque

  • 1Department of Medicine, University of Virginia, Charlottesville, VA, USA.

Handbook of Clinical Neurology
|July 9, 2013
PubMed
Summary
This summary is machine-generated.

Brain abscess caused by Entamoeba histolytica typically affects young men after liver abscess treatment. Central nervous system symptoms like headache and altered mental status indicate this rare but serious complication.

Keywords:
CSFEntamoeba histolyticaPCRamebiasisbrain abscessliver abscess

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Identification of Virulence Markers of Mycobacterium abscessus for Intracellular Replication in Phagocytes
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Last Updated: May 10, 2026

Analysis of the Epithelial Damage Produced by Entamoeba histolytica Infection
11:49

Analysis of the Epithelial Damage Produced by Entamoeba histolytica Infection

Published on: June 12, 2014

Identification of Virulence Markers of Mycobacterium abscessus for Intracellular Replication in Phagocytes
08:34

Identification of Virulence Markers of Mycobacterium abscessus for Intracellular Replication in Phagocytes

Published on: September 27, 2018

Area of Science:

  • Infectious Diseases
  • Neurology
  • Parasitology

Background:

  • Brain abscess is a rare complication of Entamoeba histolytica infection.
  • It most often occurs in patients with a concurrent amebic liver abscess.

Purpose of the Study:

  • To describe the clinical presentation, diagnosis, and treatment of amebic brain abscess.
  • To highlight the association between amebic liver abscess and subsequent central nervous system involvement.

Main Methods:

  • Review of patient cases with Entamoeba histolytica brain abscess.
  • Analysis of clinical symptoms, diagnostic findings (serology, PCR, CSF analysis), and treatment outcomes.

Main Results:

  • The typical patient is a young male (average age 30) presenting with headache, vomiting, and altered mental status after apparent liver abscess improvement.
  • Common neurological signs include meningeal signs, facial nerve palsy, motor paralysis, and seizures.
  • Cerebrospinal fluid abnormalities are common but non-specific.

Conclusions:

  • Amebic brain abscess is a serious complication requiring prompt diagnosis and treatment.
  • Metronidazole is the recommended treatment, alongside diagnostic confirmation via serology and PCR.