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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...
Irritable Bowel Syndrome I: Introduction01:17

Irritable Bowel Syndrome I: Introduction

Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
IBS is a chronic condition that can persist over a long period or recur frequently.
The pathogenesis of IBS involves a complex interplay of the following factors:
Altered...
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.
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,...
Anatomy of the Intestines01:23

Anatomy of the Intestines

Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the small...
Dysbiosis of the Gut Microbiota01:18

Dysbiosis of the Gut Microbiota

The human gut microbiome includes a diverse array of microbial species, including beneficial commensals and opportunistic pathogens, which interact to support host health. These microbes contribute to essential functions such as nutrient metabolism, immune system modulation, and maintenance of intestinal barrier integrity. However, disruptions to this equilibrium—referred to as dysbiosis—can have widespread physiological consequences.Dysbiosis is often characterized by reduced microbial...

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Related Experiment Video

Updated: Jul 3, 2026

Ileectomy-induced Bile Overaccumulation in Mouse Intestine
06:55

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Published on: August 21, 2017

Small intestinal bacterial overgrowth.

S V Rana1, S B Bhardwaj

  • 1Department of Gastroenterology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.

Scandinavian Journal of Gastroenterology
|July 9, 2008
PubMed
Summary
This summary is machine-generated.

Small intestinal bacterial overgrowth (SIBO) is a condition causing diarrhea and weight loss. Diagnosis involves breath tests or jejunal aspirate culture, with treatment focusing on antibiotics and addressing root causes.

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Area of Science:

  • Gastroenterology
  • Microbiology

Background:

  • Small intestinal bacterial overgrowth (SIBO) is a clinical syndrome.
  • Florid SIBO presents with diarrhea and weight loss.
  • Common predisposing factors include dysmotility and anatomical abnormalities.

Purpose of the Study:

  • To outline the diagnostic methods for SIBO.
  • To describe the therapeutic strategies for SIBO.

Main Methods:

  • Diagnosis can be achieved through jejunal aspirate culture for bacterial counts.
  • Breath testing, including 14C-D-xylose, 14C-glycocholic acid, or non-invasive hydrogen tests with glucose/lactulose, aids diagnosis.
  • Identifying and correcting underlying conditions is crucial.

Main Results:

  • SIBO diagnosis relies on specific microbiological and breath tests.
  • Treatment involves antimicrobial eradication of bacterial overgrowth.
  • Nutritional deficiencies and predisposing factors require management.

Conclusions:

  • SIBO is diagnosed via culture or breath tests.
  • Treatment requires antimicrobials, nutritional support, and addressing underlying causes.
  • Effective management improves patient outcomes.