Clostridium asparagiforme sp. nov., isolated from a human faecal sample

Area of Science:

• Microbiology
• Bacteriology
• Human Microbiome Research

Background:

• The human gut harbors a diverse community of microorganisms, including anaerobic bacteria.
• Accurate classification of bacterial species is crucial for understanding their role in health and disease.

Purpose of the Study:

• To characterize and classify a novel anaerobic, Gram-positive bacterium isolated from human feces.
• To determine the phylogenetic relationship of the isolate to known bacterial species.

Main Methods:

• Isolation and cultivation of the anaerobic bacterium from human fecal samples.
• Biochemical and phenotypic characterization of the isolate.
• Molecular taxonomic methods, including 16S rRNA and gyrB gene sequencing.

Main Results:

• The isolate is an obligatory anaerobic, Gram-positive, rod-shaped bacterium producing acetate, lactate, and ethanol from glucose.
• Phylogenetic analysis based on 16S rRNA and gyrB genes indicated the isolate belongs to the Clostridium subphylum, closely related to the Clostridium coccoides cluster.
• A sequence divergence greater than 3% from related species suggested the isolate represents a new species.

Conclusions:

• The novel bacterium isolated from human feces is proposed as a new species, Clostridium asparagiforme.
• The type strain of Clostridium asparagiforme is N6 (DSM 15981 and CCUG 48471).
• This finding contributes to the taxonomic classification of Clostridium species and the understanding of the human gut microbiota.