title: 'Candidatus pasteuria usgae' sp. nov., an obligate endoparasite of the phytoparasitic nematode Belonolaimus longicaudatus.
abstract: Taxonomically relevant characteristics of a fastidiously Gram-positive, obligately endoparasitic prokaryote (strain S-1) that uses the phytoparasitic sting nematode Belonolaimus longicaudatus as its host are reviewed. 16S rDNA sequence similarity (> or = 93%) confirms its congeneric ranking with other Pasteuria species and strains from nematodes and cladocerans and corroborates morphological, morphometric and host range evidence suggesting a novel taxon. The 16S rDNA sequence of strain S-1 has greatest similarity (96%) to the 16S rDNA sequences of both Pasteuria penetrans from root-knot nematodes (Meloidogyne species) and the recently reported strain of Pasteuria isolated from the soybean cyst nematode Heterodera glycines. Because the obligately endoparasitic nature of prokaryotes in the genus Pasteuria prevents isolation of definitive type strains, strain S-1 is proposed as 'Candidatus Pasteuria usgae' sp. nov.
authors.affiliation: University of Florida - IFAS, Fort Lauderdale Research and Education Center, 3205 College Avenue, Fort Lauderdale, FL 33314-7719, USA.
authors.forename: R M
authors.initials: RM
authors.lastname: Giblin-Davis
authors.affiliation: Microbiology and Cell Science, University of Florida, PO Box 110700, Gainesville, FL 32611-0700, USA.
authors.forename: D S
authors.initials: DS
authors.lastname: Williams
authors.affiliation: Department of Crop Science, University of Illinois, AW-101 Turner Hall, 1102 South Goodwin Avenue, Urbana, IL 61801-4798, USA.
authors.forename: S
authors.initials: S
authors.lastname: Bekal
authors.affiliation: Department of Entomology and Nematology, University of Florida - IFAS, PO Box 110620, Gainesville, FL 32611-0620, USA.
authors.forename: D W
authors.initials: DW
authors.lastname: Dickson
authors.affiliation: Department of Entomology and Nematology, University of Florida - IFAS, PO Box 110620, Gainesville, FL 32611-0620, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Brito
authors.affiliation: Department of Nematology, University of California, Riverside, CA 92521, USA.
authors.forename: J O
authors.initials: JO
authors.lastname: Becker
authors.affiliation: Microbiology and Cell Science, University of Florida, PO Box 110700, Gainesville, FL 32611-0700, USA.
authors.forename: J F
authors.initials: JF
authors.lastname: Preston
mesh_terms: D000818:Animals; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D016936:Gram-Positive Endospore-Forming Bacteria / Q000145:classification* / Q000235:genetics / Q000472:pathogenicity*; D008969:Molecular Sequence Data; D010802:Phylogeny; D010944:Plants / Q000469:parasitology; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017187:Tylenchida / Q000382:microbiology* / Q000472:pathogenicity
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S