Micromonospora equina sp. nov., isolated from soil from a racecourse.

This research paper discusses the discovery and classification of a new species of the bacteria Micromonospora, known as Micromonospora equina, which was extracted from soil at the Kenilworth Racecourse in South Africa.

Method of Isolation

• Using a sample of soil from the Kenilworth Racecourse in South Africa, two strains of actinomycete bacteria were isolated.
• The area around the racecourse is rich in fynbos – a type of vegetation found in the Western Cape of South Africa – which is known to support a diverse microbial ecosystem.

Molecular Identification

• Molecular analysis was performed on the isolated strains, identifying them as members of the Micromonosporaceae family.
• These bacteria were further identified as members of the Micromonospora genus through 16S rRNA gene sequence blast analysis, a common method for determining bacterial classification.

Phylogenetic Analysis

• A phylogenetic analysis was conducted to establish the evolutionary relationship between these isolates and other related species.
• It was found that the new isolates were closely related to Micromonospora viridifaciens DSM 43909(T).
• Additional 16S rRNA gene sequence analysis revealed close relations to other Micromonospora species, including Micromonospora auratinigra TT1-11(T), Micromonospora chaiyaphumensis MC5-1(T), Micromonospora eburnea LK2-10(T), Micromonospora nigra DSM 43818(T) and Micromonospora olivasterospora DSM 43868(T).

DNA-DNA Hybridization and Physiological Testing

• DNA-DNA hybridization and physiological tests were carried out to differentiate both isolates from the corresponding species. The high relatedness in their DNA denoted that they belong to the same genomic species.
• One of the strains, Y22(T) ( = DSM 45644(T) = NRRL B-24859(T)), was chosen as the type strain to represent this new species, which was then given the name Micromonospora equina sp. nov.