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</script>Acinetobacter genomic species (gen. sp.) 3 and gen. sp. 13TU are increasingly recognized as clinically important taxa within the Acinetobacter calcoaceticus-Acinetobacter baumannii (ACB) complex. To define the taxonomic position of these genomic species, we investigated 80 strains representing the known diversity of the ACB complex. All strains were characterized by AFLP analysis, amplified rDNA restriction analysis and nutritional or physiological testing, while selected strains were studied by 16S rRNA and rpoB gene sequence analysis, multilocus sequence analysis and whole-genome comparison. Results supported the genomic distinctness and monophyly of the individual species of the ACB complex. Despite the high phenotypic similarity among these species, some degree of differentiation between them could be made on the basis of growth at different temperatures and of assimilation of malonate, l-tartrate levulinate or citraconate. Considering the medical relevance of gen. sp. 3 and gen. sp. 13TU, we propose the formal names Acinetobacter pittii sp. nov. and Acinetobacter nosocomialis sp. nov. for these taxa, respectively. The type strain of A. pittii sp. nov. is LMG 1035(T) (=CIP 70.29(T)) and that of A. nosocomialis sp. nov. is LMG 10619(T) (=CCM 7791(T)).
Acinetobacter baumannii, DNA, Bacterial, Phenotype, Acinetobacter, Genotype, RNA, Ribosomal, 16S, Molecular Sequence Data, Polyphasic taxonomy 16S rRNA rpoB MLSA Genome comparison AFLP dna-dna hybridization intensive-care-unit human clinical specimens genus acinetobacter molecular characterization sequence-analysis hong-kong identification strains outbreak, Phylogeny, Multilocus Sequence Typing
Acinetobacter baumannii, DNA, Bacterial, Phenotype, Acinetobacter, Genotype, RNA, Ribosomal, 16S, Molecular Sequence Data, Polyphasic taxonomy 16S rRNA rpoB MLSA Genome comparison AFLP dna-dna hybridization intensive-care-unit human clinical specimens genus acinetobacter molecular characterization sequence-analysis hong-kong identification strains outbreak, Phylogeny, Multilocus Sequence Typing
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