Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 8/8/2008
Publication Date: 8/8/2008
Citation: Labeda, D.P., Donahue, J.M., Williams, N.M., Sells, S.F. 2008. A polyphasic taxonomic evaluation of Streptomyces strains isolated from equine placentas. Meeting Abstract.
Technical Abstract: Actinomycete strains isolated from lesions on equine placentas were subjected to polyphasic taxonomic identification. All of the strains were isolated from placentas from horses in Kentucky. On the basis of phylogenetic analysis of 16S rDNA sequences, morphological observations, and the presence of the LL-diaminopimelic acid as the diamino-acid in whole-cell hydrolysates, the isolates clearly belong to the genus Streptomyces. Strain NRRL B-24167 was identified as a strain of Streptomyces virdochomogenes based on 100% 16S rRNA gene similarity with the type strain (ISP 5293) and morphological characteristics typical of this species. Analyses of the phylogenetic position of strains NRRL B-24165 and NRRL B-24166 based on 16S rRNA gene sequences including all valid Streptomyces species demonstrated that they represent novel species. The new species Streptomyces atriruber sp. nov. is proposed for strain NRRL B-24165 and the new species Streptomyces silaceus sp. nov. is proposed for NRRL B-24166, both names based on the distinctive color of the substrate mycelium of these strains, dark red and deep orange-yellow, respectively.