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Reclassification of Acinetobacter grimontii Carr et al. 2003 as a later synonym of Acinetobacter junii Bouvet and Grimont 1986

¹ Department of Clinical Chemistry, Microbiology and Immunology, University Hospital, Blok A, B-9000 Gent, Belgium
² Centre of Epidemiology and Microbiology, National Institute of Public Health, robárova 48, 100 42 Prague, Czech Republic
³ Department of Infectious Diseases, Leiden University Medical Center C5-P, PO Box 9600, 2300 RC Leiden, The Netherlands

Correspondence
Mario Vaneechoutte
Mario.Vaneechoutte{at}UGent.be

Using tDNA-PCR, the type strain CCM 7198^T (CIP 107470^T 17A04^T) of Acinetobacter grimontii was found to be indistinguishable from Acinetobacter junii strains. Therefore, the phenotypic properties, amplified fragment length polymorphism (AFLP) patterns and 16S rRNA and rpoB gene sequences of the type strain of A. grimontii (CCM 7198^T) were determined. We found that the strain used L-arginine and L-glutamate, in contrast to the original description and in accordance with the phenotypic properties of A. junii. By AFLP analysis, A. grimontii CCM 7198^T clustered at 50.2 % with a set of A. junii strains previously identified by DNA–DNA hybridization, which is in accordance with the previously established intraspecies values of this technique. Sequence similarity of the 16S rRNA gene between the type strains of the two species was found to be 99.9 %. Finally, DNA–DNA relatedness between the type strains of A. junii and A. grimontii was redetermined and was found to be 85 %. These findings were corroborated for a second representative of the A. grimontii type strain, DSM 14968^T. These data confirm that Acinetobacter grimontii is a later heterotypic synonym of Acinetobacter junii.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of A. junii ATCC 17908^T, A. junii SH215.SHVI (=ACI289) and A. grimontii CCM 7198^T are respectively AM410704–AM410706.

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