Microbiota and Human Health

From the study guide

Microbiota & Human Holobiont: Exam Revision Sheet

1. 📌 Essentials

  • The holobiont: host + associated microbes; considered a supra-organism.
  • Microota includes bacteria, viruses fungi, archaea; critical for health.
  • Major acquisition period: perinatal life; influenced by delivery mode (vaginal vs. C-section).
  • Enterotypes: dominant microbiota profiles—Bacteroides, Prevotella, Ruminococcus.
  • Microbiota diversity varies but shares core metabolic functions across individuals.
  • Critical barriers: mucus layer, antimicrobial peptides, immune tolerance.
  • Symbiosis types: mutualism, commensalism, pathogenic (pathobionts).
  • Main functions: digestion, vitamin synthesis, immune modulation, energy production.
  • Dysbiosis: loss of beneficial microbes, pathogen overgrowth, linked to diseases.
  • Microbiota influences neurobehavior via gut-brain axis, producing serotonin (~95%).
  • Interventions: probiotics, fecal transplants, targeting microbiome for therapy.
  • C-section heightens risks for allergies, autoimmune, neurodevelopmental issues.

2. 🧩 Key Structures & Components

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Practice quiz preview

1. What is the primary definition of a human holobiont?

2. Which technological advancement significantly contributed to the emergence of microbiota research in health and disease?

3. How does early life mode of delivery influence microbiota development?

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Flashcard preview

Holobiont — definition?

Host plus associated microbes, a supra-organism.

Microbiota — components?

Bacteria, viruses, fungi, archaea.

Enterotypes — main types?

Bacteroides, Prevotella, Ruminococcus.

Holobiont — definition?

Host plus associated microbes; a supra-organism.

Microbiota components — includes?

Bacteria, viruses, fungi, archaea.

Acquisition period — when?

Perinatal life, influenced by delivery mode.

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