Related Experiment Video
Updated: Jul 29, 2026

12:22
A Primary Neuron Culture System for the Study of Herpes Simplex Virus Latency and Reactivation
Published on: April 2, 2012
18.1K
Herpes simplex encephalitis and sarcoidosis.
1School of Pathology, Trinity College, Dublin.
Irish Journal of Medical Science
|August 13, 2016
Summary
A rare case of fatal herpes simplex encephalitis in a patient with sarcoidosis is presented. This opportunistic infection likely occurred due to weakened immunity, suggesting a potential link between sarcoidosis and viral encephalitis.
Area of Science:
- Neurology
- Immunology
- Infectious Diseases
Background:
- Sarcoidosis is an inflammatory disease that can affect multiple organs.
- Herpes simplex encephalitis (HSE) is a severe brain infection.
- Opportunistic infections can occur in individuals with compromised immune systems.
Purpose of the Study:
- To describe a unique case of fatal herpes simplex encephalitis in a patient with sarcoidosis.
- To investigate the potential pathogenetic association between sarcoidosis and viral encephalitis.
Main Methods:
- Case report of a patient with fatal herpes simplex encephalitis and sarcoidosis.
- Ultrastructural examination of brain tissue to identify viral particles.
Main Results:
- Herpes simplex virus particles were identified in the brain tissue of the patient.
- This represents the first recorded instance of concurrent herpes simplex encephalitis and sarcoidosis.
Conclusions:
- The encephalitis is likely an opportunistic infection in a patient with sarcoidosis-related immune suppression.
- This case suggests a potential pathogenetic link, similar to progressive multifocal leukoencephalopathy in sarcoidosis patients.
Related Concept Videos
Rocky Mountain Spotted Fever
Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.
Herpes
Herpes simplex type 1 (HSV‑1) is a widespread pathogen responsible for orolabial lesions. It is an enveloped, double-stranded DNA (dsDNA) virus belonging to the family Herpesviridae. Once the virus infects a host cell, its double‑stranded DNA genome is delivered into the nucleus, where a coordinated cascade of immediate‑early, early, and late gene expression directs viral DNA replication, structural protein synthesis, and virion assembly. After primary infection of epithelial cells, HSV-1...
Arboviral Encephalitis
Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...
Genital Herpes
Genital herpes is a sexually transmitted infection primarily caused by herpes simplex virus type 2 (HSV-2), though herpes simplex virus type 1 (HSV-1) is increasingly implicated in genital infections, particularly among younger populations. Transmission occurs mainly through sexual contact, with asymptomatic viral shedding serving as a major route of spread. This characteristic makes HSV-2 difficult to control at a population level, as individuals may unknowingly transmit the virus even in the...
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...
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...

