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Updated: Aug 16, 2026

An In vitro Model to Study Immune Responses of Human Peripheral Blood Mononuclear Cells to Human Respiratory Syncytial Virus Infection
Published on: December 10, 2013
Fever in respiratory virus infections
Abstract:
The case records of 258 children with adenovirus; influenza A or B virus; parainfluenza 1, 2, or 3 virus; or respiratory syncytial virus infections were studied retrospectively with special attention to the degree and duration of fever. A temperature of 39.0 degrees C or higher was most frequently recorded in adenovirus, influenza A, and influenza B virus infections (in 68%, 84%, and 65%, respectively). The mean highest degree of fever in respiratory virus infections (39.2 degrees C +/- 0.6 degrees C) during hospitalization did not differ from that in defined serious bacterial infections, ie, meningitis, epiglottitis, sepsis, and urinary tract infections (39.3 degrees C +/- 0.7 degrees C). The mean duration of fever varied from 2.5 days (parainfluenza 2) to 5.2 days (influenza B). Of all children with respiratory virus infections, 37% had fever lasting five days or longer. The data show that high and prolonged fever is frequently associated with respiratory virus infections in hospitalized children and that it does not differ significantly from fever in severe bacterial infections.
Insights
High fever is common in children hospitalized with respiratory virus infections like adenovirus and influenza. The fever
Area of Science:
- Pediatric Infectious Diseases
- Virology
- Clinical Microbiology
Background:
- Fever is a common symptom in pediatric respiratory infections.
- Distinguishing viral from bacterial causes can be challenging based on fever alone.
Purpose of the Study:
- To analyze the degree and duration of fever in children hospitalized with specific respiratory viral infections.
- To compare fever patterns in viral infections with those in serious bacterial infections.
Main Methods:
- Retrospective analysis of case records for 258 children.
- Inclusion of infections caused by adenovirus, influenza A/B, parainfluenza, and respiratory syncytial virus.
- Comparison with data from children diagnosed with meningitis, epiglottitis, sepsis, and urinary tract infections.
Main Results:
- High fevers (>= 39.0°C) were frequent in adenovirus (68%), influenza A (84%), and influenza B (65%) infections.
- Mean highest fever in viral infections (39.2°C) was similar to serious bacterial infections (39.3°C).
- Fever duration ranged from 2.5 to 5.2 days, with 37% experiencing fever for 5+ days.
Conclusions:
- High and prolonged fever are common in hospitalized children with respiratory virus infections.
- Fever characteristics in these viral infections do not significantly differ from severe bacterial infections.
- Clinical assessment should consider viral etiologies even with high and persistent fever.
Related Concept Videos
Increased Body Temperature
Types of Fever
Here are the different types of fever:
Acute Pharyngitis
Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
Classification
Acute pharyngitis can be categorized based on its underlying cause:
Influenza
Respiratory Syncytial Virus Disease
Pneumonia I: Introduction

