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Updated: May 24, 2026

Quantitative Polymerase Chain Reaction-based Analyses of Murine Intestinal Microbiota After Oral Antibiotic Treatment
Published on: November 17, 2018
Composition and roles of intestinal microbiota in children
Alfredo Guarino1, Anna Wudy, Francesca Basile
1Department of Pediatrics, University of Naples, Naples, Italy. alfguari@unina.it
Insights
New molecular diagnostics reveal gut microflora
Area of Science:
- Microbiology
- Human Health
- Molecular Diagnostics
Background:
- The gut microbiota is a complex ecosystem with dynamic host interactions.
- Microbial diversity plays a crucial role in human health and disease.
Purpose of the Study:
- Update on new-generation molecular diagnostics for studying intestinal microflora.
- Evaluate alterations in gut microbiota associated with human diseases.
Main Methods:
- Review of recent advances in understanding gut microbiota.
- Focus on molecular diagnostic techniques.
Main Results:
- Infant gut colonization differs between vaginal and cesarean delivery.
- Vaginal delivery promotes maternal flora transfer (Lactobacillus, Prevotella, Bifidobacterium).
- Cesarean delivery leads to less diverse flora; adult microbiomes cluster into enterotypes.
Conclusions:
- Gut microflora balance is key to human health.
- Intestinal microflora can serve as a biomarker for diseases.
- Microbiota represents a potential therapeutic target for intestinal and extra-intestinal conditions.
Objective:
To provide an update of the advantages of new-generation molecular diagnostics to study the diversity of intestinal microflora and to evaluate its alteration in human diseases.
Methods:
We review recent advances in understanding the complex ecosystem of gut microbiota based on a dynamic and mutual interaction with the host.
Results:
In vaginal delivery, the contact with the mother's vaginal and intestinal flora is an important source of Lactobacillus, Prevotella and other Bifidobacterium. On the opposite, in cesarean delivery, direct contact of the mouth of the newborn with vaginal and intestinal microbiota is replaced by exogenous non-maternally derived bacteria colonizing the infants' intestine producing a less diverse flora. The original microbiome settings evolve during the growth converging to three main clusters defined "enterotypes" in the adult age.
Conclusions:
The key role in human health could depend on the balance between beneficial and harmful microbial species populating the gut, therefore the intestinal microflora can been considered as a potential biomarker and/or therapeutic target in intestinal and extra-intestinal diseases.
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