title: Phylogenetic position of Taylorella equigenitalis determined by analysis of amplified 16S ribosomal DNA sequences.
abstract: The 16S ribosomal DNA sequence of Taylorella equigenitalis (formerly Haemophilus equigenitalis), the causative organism of contagious equine metritis, was determined. A phylogenetic analysis of this sequence revealed a phylogenetic position of T. equigenitalis in the beta subclass of the class Proteobacteria apart from the position of Haemophilus influenzae, which belongs to the gamma subclass of Proteobacteria. A close phylogenetic relationship among T. equigenitalis, Alcaligenes xylosoxidans, and Bordetella bronchiseptica was detected; Spirillum volutans and Chromobacterium fluviatile (Iodobacter fluviatile) were in the same group but slightly removed. This relationship is surprising in view of the considerable differences in the G + C contents of the genomes of these bacteria.
authors.affiliation: Department of Bacteriology, School of Veterinary Medicine, Universiteit Utrecht, The Netherlands.
authors.forename: N M
authors.initials: NM
authors.lastname: Bleumink-Pluym
authors.forename: L
authors.initials: L
authors.lastname: van Dijk
authors.forename: A H
authors.initials: AH
authors.lastname: van Vliet
authors.forename: J W
authors.initials: JW
authors.lastname: van der Giessen
authors.forename: B A
authors.initials: BA
authors.lastname: van der Zeijst
mesh_terms: D000421:Alcaligenes / Q000145:classification / Q000235:genetics; D000818:Animals; D001483:Base Sequence; D016950:Bordetella bronchiseptica / Q000145:classification / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics*; D005784:Gene Amplification; D006088:Gram-Negative Aerobic Bacteria / Q000145:classification* / Q000235:genetics*; D006734:Horse Diseases / Q000382:microbiology; D006736:Horses; D008969:Molecular Sequence Data; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics*; D012689:Sequence Homology, Nucleic Acid
chemical_list: D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S