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Related Concept Videos

Probiotics01:22

Probiotics

192
Probiotics are live, non-pathogenic microorganisms that confer health benefits by modulating the gut microbiota. The human gastrointestinal tract harbors a complex microbial ecosystem, and the balance of this microbiota is crucial for digestive and systemic health. Among the most extensively studied and utilized probiotics are species formerly classified within the genera Lactobacillus and Bifidobacterium. These organisms not only naturally colonize the human gut but are also consumed through...
192
Microorganisms in Medicine and Therapeutics01:29

Microorganisms in Medicine and Therapeutics

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Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
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Introduction to the Human Microbiota01:22

Introduction to the Human Microbiota

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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,...
68
Functions of the Gut Microbiota01:18

Functions of the Gut Microbiota

46
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...
46
Development of Human Microbiota01:30

Development of Human Microbiota

34
The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from...
34
Microbiota of the Stomach and Small Intestine01:27

Microbiota of the Stomach and Small Intestine

43
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,...
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Related Experiment Video

Updated: Apr 1, 2026

Novel Production Protocol for Small-scale Manufacture of Probiotic Fermented Foods
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Probiotics in 2015: Their Scope and Use.

Mary Ellen Sanders1

  • 1Dairy & Food Culture Technologies, Centennial, CO.

Journal of Clinical Gastroenterology
|October 9, 2015
PubMed
Summary

This review highlights the evolving probiotic field, emphasizing the need for standardized terminology and rigorous human trials to clarify probiotic efficacy and safety for diverse populations.

Area of Science:

  • Microbiology
  • Gastroenterology
  • Immunology

Background:

  • The field of probiotics is rapidly advancing, necessitating a clear understanding of current research and application challenges.
  • Existing research on probiotics requires critical evaluation regarding methodology and reporting standards.

Purpose of the Study:

  • To review key areas of interest in the probiotic field.
  • To discuss the proper use of the term "probiotic."
  • To examine regulatory hurdles and safety considerations for probiotic research and use.

Main Methods:

  • Literature review and synthesis of current research trends and challenges in the probiotic field.
  • Analysis of systematic reviews and meta-analyses concerning probiotic efficacy.
  • Examination of regulatory frameworks impacting human probiotic research in the United States.

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Main Results:

  • The definition and application of the term "probiotic" require clarification.
  • Systematic reviews and meta-analyses are crucial for evaluating probiotic evidence.
  • Regulatory challenges impact the pace and scope of human probiotic research.
  • Safety assurance is paramount, especially for vulnerable populations.

Conclusions:

  • Well-conducted and well-reported human trials are essential for advancing probiotic science.
  • Further research is needed to define specific probiotic functionalities for various indications and populations.
  • Standardization in research and reporting will enhance the reliable application of probiotics.