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Ochrobactrum haematophilum sp. nov. and Ochrobactrum pseudogrignonense sp. nov., isolated from human clinical specimens

¹ Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany
² Bundeswehr Institute of Microbiology, D-80937 Munich, Germany
³ Institut für Bakteriologie, Mykologie und Hygiene, Veterinärmedizinische Universität, A-1210 Wien, Austria
⁴ Culture Collection, University of Göteborg, Department of Clinical Bacteriology, SE-413 46 Göteborg, Sweden

Correspondence
Peter Kämpfer
peter.kaempfer{at}agrar.uni-giessen.de

Three Gram-negative, rod-shaped, non-spore-forming bacteria were isolated from clinical specimens between 1992 and 2000. On the basis of 16S rRNA gene sequence similarities, these strains (CCUG 30717^T, CCUG 43892 and CCUG 38531^T) were shown to belong to the Alphaproteobacteria, most closely related to Ochrobactrum grignonense (99.0 and 98.2 % similarity to the type strain). Chemotaxonomic data (major ubiquinone Q-10; major polyamines spermidine, sym-homospermidine and putrescine; major polar lipids phosphatidylethanolamine, phosphatidylmonomethylethanolamine, phosphatidylglycerol and phosphatidylcholine; major fatty acids C_{18 : 1}7c and C_{19 : 0} cyclo 8c) supported the affiliation of the isolates to the genus Ochrobactrum. The results of DNA–DNA hybridization and physiological and biochemical tests allowed genotypic and phenotypic differentiation of the isolates from described Ochrobactrum species. Isolates CCUG 30717^T and CCUG 43892 were closely related on the basis of DNA–DNA reassociation experiments and therefore represent one novel species, for which the name Ochrobactrum pseudogrignonense sp. nov. is proposed, with the type strain CCUG 30717^T (=CIP 109451^T). Isolate CCUG 38531^T was different from these strains and also from other Ochrobactrum species. For this strain, the name Ochrobactrum haematophilum sp. nov. is proposed, with the type strain CCUG 38531^T (=CIP 109452^T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains CCUG 30717^T and CCUG 38531^T are respectively AM422371 and AM422370.

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