Nocardia mikamii sp. nov., isolated from human pulmonary infections in the USA.
Four nocardioform bacterial strains isolated from clinical respiratory sources were characterized using a polyphasic taxonomic approach. On the basis of 16S rRNA gene sequence analyses, these strains were found to be 100 % similar to each other and were shown to belong to the genus Nocardia. Chemotaxonomic data [major menaquinone: ω-cyclic isoprene side chain MK-8(H₄(cycl)); major polar lipids: diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylinositol and phosphatidylinositol mannosides; major fatty acids: monounsaturated fatty acids with a considerable amount of tuberculostearic acid; and mycolic acids (52-62 carbon atoms)] were consistent with the assignment of the novel strains to the genus Nocardia. Comparative phylogenetic analysis of the 16S rRNA gene sequences showed that the novel strains were related to Nocardia cerradoensis DSM 44546(T) (99.8 %) and Nocardia aobensis JCM 12352(T) (99.6 %). Analysis of gyrB gene sequences showed these strains were related to N. aobensis (96.6 %) and to N. cerradoensis (96.3 %). The results suggest that gyrB gene sequencing is a more powerful tool than 16S rRNA gene sequencing for taxonomic identification within the genus Nocardia. DNA-DNA hybridization and physiological and biochemical tests supported the genotypic and phenotypic differentiation of the novel strains from related species. These data indicated that the new strains represent a novel species within the genus Nocardia, for which the name Nocardia mikamii sp. nov. is proposed, with strain W8061(T) (=DSM 45174(T)=JCM 15508(T)) as the type strain.
Jannat-Khah
Deanna
D
Bacterial Zoonoses Branch, Division of Foodborne, Bacterial, and Mycotic Diseases National Center for Zoonotic, Vector-borne, and Enteric Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
Kroppenstedt
Reiner M
RM
German Collection of Microorganisms and Cell Cultures (DSMZ), Inhoffenstraße 7B, Braunschweig, Germany.
Klenk
Hans-Peter
HP
German Collection of Microorganisms and Cell Cultures (DSMZ), Inhoffenstraße 7B, Braunschweig, Germany.
Spröer
Cathrin
C
German Collection of Microorganisms and Cell Cultures (DSMZ), Inhoffenstraße 7B, Braunschweig, Germany.
Schumann
Peter
P
German Collection of Microorganisms and Cell Cultures (DSMZ), Inhoffenstraße 7B, Braunschweig, Germany.
Lasker
Brent A
BA
Bacterial Zoonoses Branch, Division of Foodborne, Bacterial, and Mycotic Diseases National Center for Zoonotic, Vector-borne, and Enteric Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
Steigerwalt
Arnold G
AG
Bacterial Zoonoses Branch, Division of Foodborne, Bacterial, and Mycotic Diseases National Center for Zoonotic, Vector-borne, and Enteric Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
Hinrikson
Hans P
HP
Bacterial Zoonoses Branch, Division of Foodborne, Bacterial, and Mycotic Diseases National Center for Zoonotic, Vector-borne, and Enteric Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
Brown
June M
JM
Bacterial Zoonoses Branch, Division of Foodborne, Bacterial, and Mycotic Diseases National Center for Zoonotic, Vector-borne, and Enteric Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
D015373:Bacterial Typing Techniques; D016000:Cluster Analysis; D027081:DNA Gyrase / Q000235:genetics; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005227:Fatty Acids / Q000032:analysis; D006801:Humans; D008969:Molecular Sequence Data; D009615:Nocardia / Q000145:classification* / Q000302:isolation & purification*; D009617:Nocardia Infections / Q000382:microbiology*; D009693:Nucleic Acid Hybridization; D010743:Phospholipids / Q000032:analysis; D010802:Phylogeny; D018410:Pneumonia, Bacterial / Q000382:microbiology*; D011809:Quinones / Q000032:analysis; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D014481:United States
D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D010743:Phospholipids; D011809:Quinones; D012336:RNA, Ribosomal, 16S; D027081:DNA Gyrase