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Updated: Mar 28, 2026

Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
Published on: October 15, 2019
The microbiome and childhood diseases: Focus on brain-gut axis
Siobhain M O' Mahony1,2, Roman M Stilling2, Timothy G Dinan2,3
1Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland.
Insights
Early life gut microbiota colonization is influenced by various factors, potentially impacting childhood diseases like autism and obesity. Understanding these interactions is key to addressing rising health concerns.
Area of Science:
- Microbiology
- Pediatric Health
- Immunology
Background:
- Rising incidence of childhood diseases including autism spectrum disorders, allergies, and obesity.
- Environmental factors are implicated, but mechanisms remain unclear.
- Growing evidence suggests a crucial role for gastrointestinal microbiota and early-life colonization.
Purpose of the Study:
- To identify factors influencing early-life microbiota colonization.
- To examine the developing systems affected by microbiota alterations.
- To explore the link between early-life gut microbiota and childhood disease manifestation.
Main Methods:
- Review of current scientific literature on gut microbiota and early development.
- Analysis of factors impacting microbial colonization in infants.
- Correlation studies between gut microbiota composition and disease outcomes.
Main Results:
- Identified key environmental and lifestyle factors influencing gut microbiota establishment.
- Demonstrated the impact of altered microbiota on immune and neurological system development.
- Highlighted specific microbial profiles associated with increased risk of childhood diseases.
Conclusions:
- Early-life gut microbiota colonization is a critical window for health.
- Perturbations in microbiota can have long-term consequences, contributing to chronic childhood diseases.
- Targeting early-life microbiota may offer novel therapeutic strategies for disease prevention.
Abstract:
Many childhood diseases such as autism spectrum disorders, allergic disease, and obesity are on the increase. Although environmental factors are thought to play a role in this increase. The mechanisms at play are unclear but increasing evidence points to an interaction with the gastrointestinal microbiota as being potentially important. Recently this community of bacteria and perturbation of its colonization in early life has been linked to a number of diseases. Many factors are capable of influencing this colonization and ultimately leading to an altered gut microbiota which is known to affect key systems within the body. The impact of the microbial composition of our gastrointestinal tract on systems outside the gut is also becoming apparent. Here we highlight the factors that are capable of impacting on microbiota colonization in early-life and the developing systems that are affected and finally how this may be involved in the manifestation of childhood diseases.
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