Related Experiment Video
Updated: Jun 6, 2026

Growing a Cystic Fibrosis-Relevant Polymicrobial Biofilm to Probe Community Phenotypes
Published on: April 19, 2024
Mixed bacterial-fungal infections in the CF respiratory tract
Laurie Whittaker Leclair1, Deborah A Hogan
1Department of Medicine, University of Vermont, Burlington, 05405, USA. laurie.whittaker@uvm.edu
Abstract:
Cystic fibrosis (CF) is a common genetic disease whose major clinical manifestations include repeated episodes of airway infection and inflammation that ultimately result in premature death from respiratory failure. The consequences of infection by individual bacteria have been well studied and the evidence is building that fungal pathogens may be playing an important role in lung disease progression. In contrast, though many CF patients have airway infections characterized by the presence of both bacteria and fungi, our understanding of the impact of such polymicrobial infections on the host is limited. In this review, we discuss what is currently known about incidence of mixed bacterial-fungal infections, and the potential consequences of these mixed infections on the progression of CF lung disease.
Insights
Cystic fibrosis (CF) patients often experience polymicrobial infections. This review explores the incidence and impact of mixed bacterial-fungal infections on CF lung disease progression.
Area of Science:
- Pulmonary Medicine
- Microbiology
- Genetics
Background:
- Cystic fibrosis (CF) is a genetic disorder causing severe lung disease.
- Bacterial infections are common in CF, but fungal roles are increasingly recognized.
- Polymicrobial infections involving both bacteria and fungi are prevalent but poorly understood.
Purpose of the Study:
- To review the current understanding of mixed bacterial-fungal infections in CF.
- To discuss the incidence of these polymicrobial infections.
- To explore their potential impact on CF lung disease progression.
Main Methods:
- Literature review of studies on CF polymicrobial infections.
- Analysis of incidence data for mixed bacterial-fungal infections.
- Synthesis of evidence on the consequences of these infections.
Main Results:
- Mixed bacterial-fungal infections are common in CF airways.
- The synergistic or antagonistic effects of these microbes are largely unknown.
- Limited data exists on the specific impact on CF lung disease.
Conclusions:
- Further research is crucial to understand polymicrobial dynamics in CF.
- Identifying the consequences of mixed infections can guide treatment strategies.
- Addressing fungal roles alongside bacterial infections may improve CF outcomes.
Related Concept Videos
Cystic Fibrosis: Pathogenesis
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation, but...
Cystic Fibrosis: Management
Sinus disease and chronic sinusitis...
Microbiota of the Respiratory Tract
Cryptococcal Meningitis
Candidiasis
Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features

