Arthrobacter equi sp. nov., isolated from veterinary clinical material

Area of Science:

• Microbiology
• Bacteriology
• Taxonomy

Background:

• The genus Arthrobacter comprises diverse Gram-positive bacteria with significant environmental and clinical relevance.
• Accurate bacterial classification is crucial for understanding microbial ecology and disease transmission.

Purpose of the Study:

• To characterize a novel bacterial isolate (strain IMMIB L-1606(T)) from equine genital swabs.
• To determine the phylogenetic and taxonomic position of the novel isolate within the Arthrobacter genus.

Main Methods:

• Polyphasic taxonomic characterization including 16S rRNA gene sequencing.
• Comparative sequence analysis and DNA-DNA hybridization.
• Biochemical profiling and cell-wall composition analysis (peptidoglycan type A3α).

Main Results:

• Strain IMMIB L-1606(T) exhibited 93.5-99.1% 16S rRNA gene sequence similarity to recognized Arthrobacter species.
• Genotypic and phenotypic analyses, including DNA-DNA hybridization, differentiated the isolate from closely related species.
• The bacterium was identified as Gram-positive, catalase-positive, non-spore-forming, and rod-shaped.

Conclusions:

• Strain IMMIB L-1606(T) represents a novel species within the genus Arthrobacter.
• The proposed name for this new species is Arthrobacter equi sp. nov.
• The type strain is designated IMMIB L-1606(T) ( = DSM 23395(T) = CCUG 59597(T)).