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Poliomyelitis

Poliomyelitis

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...

Increased Body Temperature

Increased Body Temperature

A body temperature above 38°C (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in response to an infection or illness.

Patterns of Fever

Patterns of Fever

Before understanding the types and patterns of fever, it is essential to know its phases.

Types of Fever

Types of Fever

Fever can be triggered by several factors, including infections, nervous system disorders, certain cancers, blood diseases like leukemia, embolism, thrombosis, heatstroke, dehydration, surgical trauma, crushing injuries, and allergic reactions.
Here are the different types of fever:

Myocarditis II: Clinical Features and Diagnostic Tests

Myocarditis II: Clinical Features and Diagnostic Tests

Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...

Rabies

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Rabies is a lethal zoonotic disease caused by a single-stranded, negative-sense RNA virus of the Lyssavirus genus, within the family Rhabdoviridae. Its primary mode of transmission to humans is through bites or saliva-contaminated scratches from infected mammals such as dogs, bats, raccoons, or foxes. Transmission can also occur if infectious saliva contacts abraded skin or intact mucous membranes, including the conjunctiva.Viral Entry and Early ReplicationOnce introduced at the bite or scratch...

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RISE IN TEMPERATURE PRECEDING THE APPEARANCE OF SYMPTOMS IN EXPERIMENTAL POLIOMYELITIS.

S D Kramer¹, K H Hendrie, W L Aycock

¹Department of Preventive Medicine and Hygiene, Harvard University Medical School, Boston, and the Research Laboratory of the Vermont Department of Public Health, Burlington.

The Journal of Experimental Medicine

|October 30, 2009

Summary

Researchers identified early indicators for experimental poliomyelitis in monkeys. These signs, including temperature rise and spinal fluid changes, precede typical symptoms, mirroring the preparalytic stage in humans.

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Published on: September 9, 2022

Area of Science:

Virology
Neurology
Veterinary Medicine

Background:

Poliomyelitis is a serious viral disease affecting the nervous system.
Early diagnosis of experimental poliomyelitis is crucial for understanding disease progression.

Purpose of the Study:

To establish methods for earlier recognition of experimental poliomyelitis in monkeys.
To identify early clinical and pathological signs indicative of the preparalytic stage.

Main Methods:

Monitoring of physiological parameters (e.g., temperature).
Analysis of cerebrospinal fluid (spinal fluid) changes.
Observation of clinical symptom development in experimentally infected monkeys.

Main Results:

An early temperature rise (1-3 days before recognizable symptoms) was observed.
Associated spinal fluid changes were detected concurrently with the early temperature rise.
These early indicators suggest a distinct preparalytic stage in experimental poliomyelitis.

Conclusions:

The identified early signs allow for earlier recognition of experimental poliomyelitis in monkeys.
These findings correlate with the preparalytic stage observed in human poliomyelitis cases.
This research provides a basis for further studies into poliomyelitis pathogenesis and early intervention strategies.