Related Experiment Video
Updated: Jun 21, 2026
09:47
Selective Cleaning of Wild Caenorhabditis Nematodes to Enrich for Intestinal Microbiome Bacteria
Published on: August 13, 2021
Nocardioides caeni sp. nov., isolated from wastewater
Jung-Hoon Yoon1, So-Jung Kang, Sooyeon Park
1Korea Research Institute of Bioscience and Biotechnology , Taejon, Republic of Korea. jhyoon@kribb.re.kr
Summary
A novel bacterial species, Nocardioides caeni, was identified in Korean wastewater sludge. This Gram-positive bacterium is non-motile and rod- or coccoid-shaped, expanding the Nocardioides genus diversity.
Area of Science:
- Microbiology
- Bacteriology
- Taxonomy
Background:
- Wastewater sludge harbors diverse microbial communities.
- Accurate bacterial classification is crucial for understanding ecological roles and biotechnological applications.
Purpose of the Study:
- To taxonomically characterize a novel bacterial isolate from domestic wastewater sludge.
- To determine if the isolate represents a new species within the Nocardioides genus.
Main Methods:
- Polyphasic taxonomic study including 16S rRNA gene sequencing.
- Phylogenetic analysis and DNA-DNA relatedness assays.
- Chemotaxonomic and phenotypic characterization.
Main Results:
- Strain MN8(T) showed 98.4-99.0% 16S rRNA gene similarity to known Nocardioides species.
- Chemotaxonomic data (peptidoglycan, menaquinone, fatty acids) aligned with the Nocardioides genus.
- Low DNA-DNA relatedness (13-31%) distinguished MN8(T) from related species.
Conclusions:
- Strain MN8(T) represents a novel species, Nocardioides caeni sp. nov.
- The new species was isolated from domestic wastewater sludge in Korea.
- Nocardioides caeni expands the known diversity of the Nocardioides genus.
More Related Videos
Related Concept Videos
01:30Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
01:24Automated Microbial Diagnostics
Automated diagnostic analyzers have transformed clinical microbiology by providing rapid and reliable methods for pathogen identification and antibiotic susceptibility testing. Among these systems, the Vitek 2 is widely used because it automates the traditionally labor-intensive processes of microbial identification (ID) and antibiotic susceptibility testing (AST), delivering standardized and timely results that are essential for effective patient care.Microbial Identification with ID CardsThe...