Related Experiment Video
Updated: Aug 5, 2026

Following in Real Time the Impact of Pneumococcal Virulence Factors in an Acute Mouse Pneumonia Model Using Bioluminescent Bacteria
Published on: February 23, 2014
Splenomegaly in acute infections due to group A streptococci and viruses
Abstract:
Over a period of 9 years in general practice temporary enlargement of the spleen was found in 29 episodes of pharyngitis or tonsillitis, in 2 episodes of acute upper respiratory tract infection other than pharyngitis and in 6 episodes of acute cervical lymphadenitis. In five patients more than one episode of illness associated with splenomegaly was recorded. In 26 of the 37 episodes a possible aetiology was identified. Evidence only of infection with group A streptococci was found in 14 episodes, adenoviruses or coxsackie B viruses were isolated alone in 4 episodes and in 4 episodes the only finding was the presence in the blood of more than occasional atypical mononuclear cells; in 4 episodes there was evidence of both streptococcal and viral infection. Episodes with evidence of streptococcal infection only tended to be of shorter duration and to be more evenly distributed over the year than were episodes without such evidence. Temporary splenomegaly was noted also in two children with varicella (one of whom also had streptococcal infection) and in an adult with probable rubella.
Insights
Enlarged spleen (splenomegaly) can temporarily occur with common infections like pharyngitis. Group A streptococci and viral infections were frequently associated with this finding in general practice.
Area of Science:
- General Practice
- Infectious Diseases
- Pediatrics
Background:
- Splenomegaly, or enlarged spleen, is a clinical sign that can be associated with various infections.
- Understanding the common causes of temporary splenomegaly in primary care settings is important for accurate diagnosis.
Purpose of the Study:
- To investigate the incidence and potential causes of temporary splenomegaly observed in general practice over a nine-year period.
Main Methods:
- Retrospective analysis of general practice records over 9 years.
- Identification of episodes of splenomegaly and associated clinical diagnoses.
- Microbiological and serological investigations to determine causative agents.
Main Results:
- Thirty-seven episodes of temporary splenomegaly were recorded, most commonly associated with pharyngitis/tonsillitis (29 episodes).
- Identified aetiologies included Group A streptococci (14 episodes), adenoviruses/coxsackie B viruses (4 episodes), and atypical mononuclear cells (4 episodes).
- Four episodes showed evidence of both streptococcal and viral infections. Streptococcal-only infections were shorter and year-round.
Conclusions:
- Temporary splenomegaly is a notable finding in various common infections, particularly streptococcal pharyngitis and viral upper respiratory tract infections.
- Prompt identification of causative agents like streptococci and viruses aids in understanding the duration and presentation of illness.
Related Concept Videos
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:
Tonsillitis I: Introduction
Etiology
Three primary contributing factors have been identified.
Bacterial Meningitis
Streptococcal Pharyngitis
Viral Meningitis
Cytomegalovirus Disease

