Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

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...
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.
Bacterial Phylum Firmicutes01:27

Bacterial Phylum Firmicutes

Firmicutes is a diverse phylum of Gram-positive bacteria characterized by a low GC content in their genomes. This phylum includes organisms with monoderm or diderm cell envelopes, highlighting a complex evolutionary history. Firmicutes comprises several major orders, including Lactobacillales, Clostridiales, and Bacillales, which exhibit remarkable diversity in their morphology, metabolism, and ecological roles.The order Lactobacillales includes lactic acid bacteria, which are fermentative...
What is Monogastric Digestion?01:50

What is Monogastric Digestion?

The human body contains a monogastric digestive system. In a monogastric digestive system, the stomach only contains one chamber in which it digests food. Several other animal species also have monogastric digestive systems, including pigs, horses, dogs, and birds. This chapter, however, focuses on the human digestive system.
Microbiota of the Urogenital Tract01:28

Microbiota of the Urogenital Tract

The human urogenital system, once thought to be sterile in healthy individuals, is now recognized as a complex microbial habitat. Advancements in molecular sequencing techniques have revealed that even in healthy adults, the kidneys and bladder harbor microbial populations similar to those found in the distal urethra, albeit in much lower abundance. These resident microorganisms, while generally innocuous, can become opportunistic pathogens under conditions that alter the urogenital...
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...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Age-Related Microbial Differences in Newly Diagnosed Crohn's Disease Reveal the Distinct Enrichment of Oral-Associated Taxa in Pediatric Patients.

Gut and liver·2026
Same author

Fermented food microbiome: influence on oral and gut microbiota, and human health.

Nature reviews. Microbiology·2026
Same author

Corrigendum: Paenibacillus marinisediminis sp. nov., a bacterium isolated from marine sediment.

Journal of microbiology (Seoul, Korea)·2026
Same author

Unraveling the diagnostic and prognostic signatures of oral microbiota in head and neck cancer.

BMC biology·2026
Same author

Dysbiosis of oral and gut microbiomes characterized by elevated Lactococcus in a mouse model of oral squamous cell carcinoma.

NPJ biofilms and microbiomes·2026
Same author

Pre-Administration of Akkermansia Muciniphila Prevents the Development of Severe Acute Graft-Versus-Host Disease in Systemic Organs.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2025

Related Experiment Video

Updated: May 31, 2026

Preparation and Maintenance of Bioexclusion IsoPositive Cage Experiment for Human Fecal Transplantation into Germ-Free Mice
07:45

Preparation and Maintenance of Bioexclusion IsoPositive Cage Experiment for Human Fecal Transplantation into Germ-Free Mice

Published on: February 28, 2025

Ruminococcus faecis sp. nov., isolated from human faeces.

Min-Soo Kim1, Seong Woon Roh, Jin-Woo Bae

  • 1Department of Life and Nanopharmaceutical Sciences and Department of Biology, Kyung Hee University, Seoul, 130-701, Republic of Korea.

Journal of Microbiology (Seoul, Korea)
|July 1, 2011
PubMed
Summary
This summary is machine-generated.

A novel anaerobic bacterium, Ruminococcus faecis Eg2(T), was isolated from human feces. This Gram-positive coccus ferments glucose into lactic and acetic acids, expanding the Ruminococcus genus.

More Related Videos

Fecal (micro) RNA Isolation
05:35

Fecal (micro) RNA Isolation

Published on: October 28, 2020

Selective Cleaning of Wild Caenorhabditis Nematodes to Enrich for Intestinal Microbiome Bacteria
09:47

Selective Cleaning of Wild Caenorhabditis Nematodes to Enrich for Intestinal Microbiome Bacteria

Published on: August 13, 2021

Related Experiment Videos

Last Updated: May 31, 2026

Preparation and Maintenance of Bioexclusion IsoPositive Cage Experiment for Human Fecal Transplantation into Germ-Free Mice
07:45

Preparation and Maintenance of Bioexclusion IsoPositive Cage Experiment for Human Fecal Transplantation into Germ-Free Mice

Published on: February 28, 2025

Fecal (micro) RNA Isolation
05:35

Fecal (micro) RNA Isolation

Published on: October 28, 2020

Selective Cleaning of Wild Caenorhabditis Nematodes to Enrich for Intestinal Microbiome Bacteria
09:47

Selective Cleaning of Wild Caenorhabditis Nematodes to Enrich for Intestinal Microbiome Bacteria

Published on: August 13, 2021

Area of Science:

  • Microbiology
  • Bacteriology
  • Taxonomy

Background:

  • Human gut microbiota harbors diverse bacterial species.
  • Accurate taxonomic classification is crucial for understanding microbial roles.

Purpose of the Study:

  • To characterize and classify a newly isolated bacterial strain from human feces.
  • To determine the phylogenetic and phenotypic properties of strain Eg2(T).

Main Methods:

  • Isolation and cultivation of bacterial strain Eg2(T) from human faeces.
  • Phenotypic characterization including optimal growth conditions, enzyme activities, and fermentation products.
  • Chemotaxonomic analysis of major fatty acids.
  • Genotypic analysis using 16S rRNA gene sequencing for phylogenetic placement.

Main Results:

  • Strain Eg2(T) is an anaerobic, Gram-positive, non-motile, non-spore-forming coccus.
  • Optimal growth at 37°C, positive catalase activity, negative oxidase activity.
  • Fermentation of glucose yields lactic and acetic acids.
  • 16S rRNA gene sequence analysis shows close relatedness to the genus Ruminococcus (96.3% similarity to R. torques).
  • G+C content is 43.4 mol%.

Conclusions:

  • Strain Eg2(T) represents a novel species within the genus Ruminococcus.
  • The proposed name for this new species is Ruminococcus faecis sp. nov.
  • This finding contributes to the understanding of bacterial diversity in the human gut.