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Updated: Apr 7, 2026

Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
Published on: October 15, 2019
Potential role of the intestinal microbiota in programming health and disease
1O. Goulet is with the Department of Pediatric Gastroenterology-Hepatology-Nutrition, National Reference Center for Rare Digestive Disease, Hôpital Necker-EnfantsMalades, University of Paris Descartes, Paris, France. olivier.goulet@nck.aphp.fr.
Insights
The gut microbiota, influenced by early life factors, plays a crucial role in infant health and disease development. Modulating this microbial community may help prevent or treat various disorders.
Area of Science:
- Microbiology
- Immunology
- Gastroenterology
Background:
- The gut microbiota composition is shaped by prenatal and postnatal factors, including delivery mode, feeding, and antibiotic exposure.
- Intestinal microbiota critically influences postnatal gut function and immune system development.
- Early microbial colonization may program the host for later disease susceptibility (microbial programming).
Purpose of the Study:
- To review the influence of gut microbiota on human health and disease.
- To explore the association between gut microbiota dysbiosis and various clinical conditions.
- To discuss the potential of microbiota modulation for disease prevention and treatment.
Main Methods:
- Literature review of recent advances in microbiota research.
- Analysis of the relationship between microbiota composition and host health outcomes.
- Evaluation of therapeutic strategies targeting the gut microbiota.
Main Results:
- Gut microbiota composition varies significantly based on early life exposures.
- Dysbiosis is linked to numerous health issues, including metabolic disorders, autoimmune diseases, inflammation, and necrotizing enterocolitis.
- Symbiotic host-bacterial interactions are essential for human health.
Conclusions:
- The gut microbiota is fundamental to human health, influencing development and disease risk.
- Microbiota modulation using probiotics, prebiotics, or fermented foods shows promise for treating or preventing conditions like IBS, diarrhea, allergies, and necrotizing enterocolitis.
Abstract:
The composition of the microbiota varies according to prenatal events, delivery methods, infant feeding, infant care environment, and antibiotic use. Postnatal gut function and immune development are largely influenced by the intestinal microbiota. Emerging evidence has shown that early microbiota colonization may influence the occurrence of later diseases (microbial programming). The vast majority of microbial species (commensals) give rise to symbiotic host-bacterial interactions that are fundamental for human health. However, changes in the composition of the gut microbiota (dysbiosis) may be associated with several clinical conditions, including obesity and metabolic diseases, autoimmune diseases and allergy, acute and chronic intestinal inflammation, irritable bowel syndrome (IBS), allergic gastroenteritis (e.g., eosinophilic gastroenteritis and allergic IBS), and necrotizing enterocolitis. Based on recent advances, modulation of gut microbiota with probiotics, prebiotics, or fermented dairy products has been suggested as a treatment of, or prevention for, different disorders such as IBS, infectious diarrhea, allergic disease, and necrotizing enterocolitis.
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