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Updated: Jul 15, 2026

Intracranial Subarachnoidal Route of Infection for Investigating Roles of Streptococcus suis Biofilms in Meningitis in a Mouse Infection Model
Published on: July 1, 2018
[Meningitis caused by Streptococcus suis]
S Braun1, G Jechart, U Emmerling
1Institut für Laboratoriumsmedizin, Mikrobiologie und Umwelthygiene, Klinikum Augsburg.
History And Admission Findings:
A 42-year-old man was admitted to hospital because of headache and fever for two days and showing signs of meningism. As a butcher he had had frequent cuts on his hands and forearms.
Investigations And Diagnosis:
Analysis of the cerebrospinal fluid revealed an elevated leukocyte count (81% segmented neutrophils). Large numbers of Gram-positive bacteria were found in both cerebrospinal fluid and blood culture, which were subsequently identified as Streptococcus suis (S. suis) by biochemical methods. The hypothesis of bacterial meningitis was thus confirmed.
Treatment And Clinical Course:
The patient was treated with ampicillin, initially combined with ceftriaxone. Hearing impairment and vestibular dysfunction - a frequent complication after infection with S. suis - were observed as sequelae, indicating involvement of the vestibulocochlear nerve.
Conclusion:
Infections caused by S. suis are rare in Europe but must be taken into account if an occupational exposition to pigs is established.
Insights
A butcher developed Streptococcus suis (S. suis) meningitis after occupational exposure. Early diagnosis and treatment are crucial to prevent complications like hearing loss.
Area of Science:
- Infectious Diseases
- Bacteriology
- Neurology
Background:
- Streptococcus suis (S. suis) is an emerging zoonotic pathogen.
- Occupational exposure, particularly in swine handlers, poses a risk for S. suis infection.
- Bacterial meningitis remains a significant cause of morbidity and mortality.
Observation:
- A butcher presented with symptoms of meningitis, including headache, fever, and nuchal rigidity.
- The patient had a history of frequent hand and forearm cuts, suggesting a potential exposure route.
- Cerebrospinal fluid analysis revealed elevated leukocytes and Gram-positive bacteria.
Findings:
- Blood and cerebrospinal fluid cultures confirmed Streptococcus suis (S. suis) infection.
- The patient was treated with ampicillin and ceftriaxone.
- Sequelae included hearing impairment and vestibular dysfunction, indicating vestibulocochlear nerve involvement.
Implications:
- This case highlights the importance of considering S. suis in meningitis cases with occupational exposure to pigs.
- Prompt diagnosis and appropriate antibiotic therapy are essential for favorable outcomes.
- Neurological and audiological sequelae underscore the severity of S. suis infections.
Related Concept Videos
Bacterial Meningitis I: Introduction
Bacterial Meningitis
Bacterial Meningitis II: Pathophysiology
Viral Meningitis
Cryptococcal Meningitis
Brain Abscess l: Introduction

