Related Experiment Video
Updated: Jun 19, 2026
07:06
Particle Agglutination Method for Poliovirus Identification
Published on: April 20, 2011
IMMUNOLOGICAL DISTINCTIONS OF ENCEPHALITIS AND POLIOMYELITIS
1Laboratories of The Rockefeller Institute for Medical Research.
The Journal of Experimental Medicine
|October 30, 2009
Summary
Poliomyelitis and lethargic encephalitis are distinct epidemic diseases affecting the central nervous system. Blood serum from poliomyelitis patients neutralizes its virus, unlike serum from encephalitis patients, confirming they are separate conditions.
Area of Science:
- Neurology
- Epidemiology
- Virology
Background:
- Lethargic encephalitis and poliomyelitis are epidemic diseases impacting the central nervous system.
- While both affect the CNS, their primary lesion sites differ: basal ganglia for encephalitis and spinal cord/medulla for poliomyelitis.
- Seasonal prevalence is less distinct than previously thought, necessitating other differentiation methods.
Purpose of the Study:
- To differentiate between lethargic encephalitis and poliomyelitis.
- To investigate the communicability of these diseases to monkeys.
- To explore the potential of blood serum neutralization as a diagnostic marker.
Main Methods:
- Comparative analysis of clinical manifestations and seasonal prevalence.
- Transmission experiments in monkeys via inoculation of affected central nervous tissues.
- In vitro testing of blood serum from convalescent patients for viral neutralization capacity.
Main Results:
- Poliomyelitis is readily transmissible to monkeys, whereas lethargic encephalitis transmission remains doubtful.
- Blood serum from convalescent poliomyelitis cases (human and monkey) neutralizes the poliomyelitis virus.
- Blood serum from recently convalescent epidemic encephalitis cases lacks this neutralizing power.
Conclusions:
- Epidemic poliomyelitis and lethargic encephalitis are distinct diseases.
- Differences in monkey transmissibility and serum neutralization support their classification as separate affections.
- Further research into the infectious nature and specific lesions of epidemic encephalitis is warranted.
More Related Videos
08:20Hippocampal Neuronal Cultures to Detect and Study New Pathogenic Antibodies Involved in Autoimmune Encephalitis
Published on: June 2, 2022
09:37Detection of Polyfunctional T Cells in Children Vaccinated with Japanese Encephalitis Vaccine via the Flow Cytometry Technique
Published on: September 23, 2022
Related Concept Videos
01:17Poliomyelitis
Poliomyelitis is caused by poliovirus, a small, non-enveloped, positive-sense RNA virus of the Picornaviridae family and Enterovirus genus. Transmission occurs primarily via the fecal-oral route, often through ingestion of contaminated water or food. The virus initially replicates in the oropharynx and intestinal mucosa, particularly in lymphoid tissues such as the tonsils, Peyer’s patches, and regional lymph nodes. Primary viremia follows, allowing dissemination throughout the body.In most...
01:19Encephalitis 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...
01:26Encephalitis 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...
01:25Arboviral 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...
01:18Viral 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...
01:23Immunological Memory
Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature is...
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature is...