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Updated: Jul 13, 2025
Purifying the Impure: Sequencing Metagenomes and Metatranscriptomes from Complex Animal-associated Samples
Published on: December 22, 2014
Defining microbial community functions in chronic human infection with metatranscriptomics
Aanuoluwa E Adekoya1, Hoody A Kargbo1, Carolyn B Ibberson1
1Department of Microbiology and Plant Biology, University of Oklahoma, Norman, Oklahoma, USA.
Importance:
The microbial diversity in polymicrobial infections (PMIs) allows for community members to establish interactions with one another, which can result in enhanced disease outcomes such as increased antibiotic tolerance and chronicity. Chronic PMIs result in large burdens on health systems, as they affect a significant proportion of the population and are expensive and difficult to treat. However, investigations into physiology of microbial communities in actual human infection sites are lacking. Here, we highlight that the predominant functions in chronic PMIs differ, and anaerobes, often described as bystanders, may be significant in the progression of chronic infections. Determining the community structure and functions in PMIs is a critical step toward understanding the molecular mechanisms that increase the virulence potential of the microbial community in these environments.
Insights
Polymicrobial infections (PMIs) involve complex microbial communities. Our findings reveal that anaerobic bacteria, often overlooked, play a crucial role in chronic PMIs, impacting antibiotic tolerance and infection progression.
Area of Science:
- Microbiology
- Infectious Diseases
- Microbial Ecology
Background:
- Polymicrobial infections (PMIs) are common and lead to increased antibiotic tolerance and chronic disease.
- Chronic PMIs pose significant health burdens due to treatment difficulty and prevalence.
- Limited research exists on microbial community physiology at actual human infection sites.
Purpose of the Study:
- To investigate the functional roles of microbial communities within chronic polymicrobial infections.
- To understand the interactions and contributions of different microbial species, including anaerobes, in infection progression.
- To identify key molecular mechanisms driving increased virulence in polymicrobial infections.
Main Methods:
- Analysis of microbial community structure and function in chronic infection sites.
- Investigating the physiological roles of predominant microbial species, particularly anaerobes.
- Comparative analysis of microbial functions in different chronic PMI environments.
Main Results:
- Predominant functions within chronic PMIs vary significantly.
- Anaerobic bacteria, previously considered bystanders, are found to be significant contributors to chronic infection progression.
- Understanding community structure and function is key to deciphering virulence mechanisms.
Conclusions:
- The composition and function of microbial communities in chronic PMIs are critical for disease outcomes.
- Anaerobes may be key players in the chronicity and severity of polymicrobial infections.
- Further research into PMI physiology is essential for developing effective therapeutic strategies.
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