Related Experiment Video
Updated: Apr 1, 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
Cryptococcus neoformans and Streptococcus pneumoniae co-infection in post-traumatic meningitis in a patient with
Faryal Saleem1, Naima Fasih1, Afia Zafar1
1Department of Pathology and Microbiology, Aga Khan University Hospital, Karachi, Pakistan.
Abstract:
Meningitis is a serious disease associated with considerable morbidity and mortality. Mixed meningeal infections due to bacteria and fungi are exceptionally rare. Here we report a case of meningeal co-infection with cryptococcus neoformans and streptococcus pneumoniae in a patient with unknown human immunodeficiency virus status. Because of the rarity of such cases, stringent screening of every cerebrospinal fluid specimen to exclude the presence of multiple pathogens is imperative. Assessment of patients for immunodeficiencies in case of isolation of an opportunistic organism like cryptococcus is also needed.
Insights
Mixed bacterial and fungal meningitis is rare. This case highlights a co-infection with Cryptococcus neoformans and Streptococcus pneumoniae, emphasizing the need for thorough cerebrospinal fluid screening and immunodeficiency assessment.
Area of Science:
- Infectious Diseases
- Microbiology
- Neurology
Background:
- Meningitis presents significant morbidity and mortality.
- Mixed bacterial and fungal meningeal infections are exceptionally rare.
Observation:
- A case of co-infection with Cryptococcus neoformans and Streptococcus pneumoniae is reported.
- The patient had an unknown human immunodeficiency virus status.
Findings:
- This case underscores the rarity of mixed bacterial-fungal meningitis.
- Cerebrospinal fluid screening must exclude multiple pathogens.
Implications:
- Patients with opportunistic organisms like Cryptococcus require immunodeficiency assessment.
- Thorough diagnostic workups are crucial for rare co-infections.
Related Concept Videos
Viral Meningitis
Atypical Pneumonia
Pneumonia I: Introduction
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Pneumonia II: Pathophysiology
Pneumonia III: Complications and Assessment
Pneumonia IV: Management
Bacterial Pneumonia Treatment
For bacterial pneumonia, antibiotics serve as the cornerstone of therapy. Initial treatment often begins with empirical antibiotics, tailored to the anticipated causative organism and adjusted based on culture results. Key antibiotic choices include:

