Lentzea kentuckyensis sp. nov., of equine origin.

This study reports on the identification and classification of a new strain of actinomycete, named ‘Lentzea kentuckyensis’, which was found in an equine placenta during routine diagnostic tests for a specific type of placentitis.

Study Methodology and Findings

• The focus of the study was the analysis and classification of a novel actinomycete strain, designated LDDC 2876-05(T). This strain was originally identified during routine diagnostic tests on an equine placenta, the procedure was intended for detecting nocardioform placentitis – a type of bacterial infection that affects the placenta in horses.
• In preliminary studies, the bacterium was found to be unique and phylogenetically different from other known bacterial genera, such as Crossiella and Amycolatopsis. Analysis suggested that the found strain could belong to the Lentzea genus.

Detailed Analysis and Classification

• To establish its classification, a comprehensive assessment of several characteristics of strain LDDC 2876-05(T) was conducted. This is referred to as a polyphasic study and involves examining various traits, such as its genotypic and phenotypic characteristics.
• The detailed analysis confirmed that the bacterium was indeed part of the Lentzea genus. This was established due to the strain’s cheomotaxomic and morphological similarities with other known species within this genus. Cheomotaxonimics is the study of the chemical structures within a cell that are used for taxonomic classification, while morphological similarities refer to the bacterium’s structural similarity to other species.
• Moreover, strain LDDC 2876-05(T) was found to be distinct from all other species within the Lentzea genus that have validly published names. This distinction was based on its unique phylogenetic and physiological attributes as well as its fatty acid profile. Phylogenetic characteristics indicate its evolutionary development and relationship to other species, while physiological attributes address how the organism functions and survives, including their energy production and usage.

Conclusion and Newly Proposed Species

• Since strain LDDC 2876-05(T) exhibited distinct characteristics from other Lentzea species and clearly belonged to this genus, the researchers proposed that it be recognized as a novel species within the Lentzea genus. They suggested the name ‘Lentzea kentuckyensis’ for this new species.
• The ‘type strain’ of Lentzea kentuckyensis is LDDC 2876-05(T), suggesting that this particular strain is the reference point or the standard bearer for the species. This strain is also referred to as NRRL B-24416(T) or DSM 44909(T) in other type collections.