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Related Concept Videos

Microbiota of the Large Intestine01:27

Microbiota of the Large Intestine

The large intestine hosts the most densely populated microbial ecosystem in the human body. This complex community primarily consists of anaerobic bacteria, with Bacillota (formerly Firmicutes) and Bacteroidota (formerly Bacteroidetes) as the predominant groups. The distribution of these microbes varies along different sections of the large intestine, influenced by local environmental factors such as oxygen availability and nutrient composition.The cecum, located at the beginning of the large...
Functions of the Gut Microbiota01:18

Functions of the Gut Microbiota

The gut microbiota includes trillions of microorganisms that colonize the human gastrointestinal tract, including bacteria, archaea, viruses, and fungi. This complex ecosystem plays a critical role in maintaining intestinal and systemic health. Most of these microbes inhabit the large intestine, establishing a relatively stable and diverse community that contributes to gut homeostasis through various metabolic, immunological, and protective mechanisms.Dominant bacterial phyla, such as...
Microbiota of the Stomach and Small Intestine01:27

Microbiota of the Stomach and Small Intestine

The human gastrointestinal (GI) tract is characterized by distinct physicochemical conditions that shape its microbial communities. Among these, the stomach presents a particularly challenging environment for microbial colonization due to its highly acidic pH, ranging from 1 to 3. This extreme acidity effectively limits microbial density. However, certain acid-tolerant microorganisms are capable of surviving in this niche. Notably, Helicobacter pylori can colonize the gastric mucosa,...
Introduction to the Human Microbiota01:22

Introduction to the Human Microbiota

Microorganisms colonize various regions of the human body, including the mouth, nasal passages, throat, stomach, intestines, urogenital tract, and skin. The total number of microbial cells is estimated to range from 10¹³ to 10¹⁴—comparable to, or exceeding, the number of human somatic cells. This host–microbiome relationship has led to the conceptualization of humans as supraorganisms, wherein microbial communities perform vital roles in development, immunity, and disease...
Microbial Interactions: Mutualism01:25

Microbial Interactions: Mutualism

Mutualism is a symbiotic interaction in which all participating organisms benefit. These relationships can be obligate or facultative and are fundamental to ecosystem functions across diverse biological systems.Plant–Fungi MutualismOne well-known example is the association between plant roots and mycorrhizal fungi, such as Rhizophagus species. The fungal hyphae penetrate the root hairs and the epidermis, forming an extensive hyphal network that establishes a symbiotic association. Through this...
Bacterial Flora of the Large Intestine01:29

Bacterial Flora of the Large Intestine

The gut microbiome is formed by a vast and diverse community of bacteria that colonizes our large intestine. These bacteria start residing in the gut from birth and continue diversifying throughout life, influenced by factors such as diet, lifestyle, and stress. The gut bacterial community also includes bacteria from food and those that enter the colon through the anus.
The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.

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Examination of Host Phenotypes in Gambusia affinis Following Antibiotic Treatment
09:25

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Published on: February 22, 2017

Host-microbiota interactions within the fish intestinal ecosystem.

T Pérez1, J L Balcázar, I Ruiz-Zarzuela

  • 1Laboratory of Fish Pathology, Faculty of Veterinary Sciences, Universidad de Zaragoza, Zaragoza, Spain.

Mucosal Immunology
|March 19, 2010
PubMed
Summary
This summary is machine-generated.

Teleost fish gut microbiota influences their immune system. Understanding this relationship is key to developing probiotics for fish health and disease prevention.

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Area of Science:

  • Aquatic microbiology
  • Fish immunology
  • Gut health

Background:

  • Teleost fish continuously interact with aquatic environments and their associated microbiota.
  • Mucosal surfaces are critical interfaces for host-microbiota interactions, requiring immune discrimination between pathogens and commensals.
  • A balanced gut microbiota positively impacts gut immune functions, while dysbiosis can lead to disease.

Purpose of the Study:

  • To explore the intricate relationship between the fish immune system and intestinal bacteria.
  • To investigate how the gut microbiota influences the development of immune responses in teleost fish.
  • To highlight the potential of probiotics in modulating fish gut health.

Main Methods:

  • Review of current scientific literature on fish gut microbiota and immunology.
  • Analysis of host-microbe interactions at mucosal surfaces.
  • Focus on the role of bacterial communities in shaping fish immune responses.

Main Results:

  • The gut microbiota plays a crucial role in educating and regulating the fish immune system.
  • Commensal bacteria contribute to the development of immune tolerance and effective defense mechanisms.
  • Imbalances in microbiota composition can compromise immune function and increase disease susceptibility.

Conclusions:

  • The fish gut microbiota is integral to immune system development and function.
  • Targeting the gut microbiota with probiotics offers a promising strategy for enhancing fish health and preventing diseases.
  • Further research into fish-microbe interactions is essential for advancing aquaculture and fish welfare.