<Emphasis Type="Italic">Streptomyces sudanensis</Emphasis> sp. nov., a new pathogen isolated from patients with actinomycetoma |
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| Authors: | Erika T Quintana Katarzyna Wierzbicka Pawel Mackiewicz Abdalla Osman Ahmed H Fahal Mohamed E Hamid Jolanta Zakrzewska-Czerwinska Luis A Maldonado Michael Goodfellow |
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| Institution: | (1) School of Biology, University of Newcastle, Newcastle upon Tyne, NE1 7RU, UK;(2) Present address: Instituto Politécnico Nacional (IPN), Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), CP 07340 Mexico, DF, Mexico;(3) Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Weigla 12, 53-114 Wroclaw, Poland;(4) Faculty of Biotechnology, Department of Genomics, University of Wrocław, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland;(5) Faculty of Medicine, Mycetoma Research Centre, University of Khartoum, PO Box 102, Khartoum, Sudan;(6) Faculty of Veterinary Science, Department of Preventive Medicine and Public Health, University of Khartoum, Khartoum North, Sudan;(7) Present address: Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México (UNAM), CP 04510 Mexico, DF, Mexico |
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| Abstract: | Nine strains isolated from mycetoma patients and received as Streptomyces somaliensis were the subject of a polyphasic taxonomic study. The organisms shared chemical markers consistent with their classification
in the genus Streptomyces and formed two distinct monophyletic subclades in the Streptomyces 16S rRNA gene tree. The first subclade contained four organisms, including the type strain of S. somaliensis, and the second clade the remaining five strains which had almost identical 16S rRNA sequences. Members of the two subclades
were sharply separated using DNA:DNA relatedness and phenotypic data which also showed that the subclade 1 strains formed
an heterogeneous group. In contrast, the subclade 2 strains were assigned to a single genomic species and had identical phenotypic
profiles. It is evident from these data that the subclade 2 strains should be recognised as a new species of Streptomyces. The name proposed for this new species is Streptomyces sudanensis sp. nov. The type strain is SD 504T (DSM = 41923T = NRRL B-24575T).
Erika T. Quintana and Katarzyna Wierzbicka contributed equally to this work.
The GenBank accession numbers for the 16S rRNA gene sequences of Streptomyces somaliensis DSM 40738T and Streptomyces sudanensis DSM 41607, DSM 41608, DSM 41609, SD 504T and SD 509 are EF540897, EF540898, EF540999, EF515876 and EF540900. |
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| Keywords: | Mycetoma Polyphasic taxonomy Streptomyces |
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