HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Handley, P. Articles by Whiley, R. A. Search for Related Content PubMed Articles by Handley, P. Articles by Whiley, R. A. Agricola Articles by Handley, P. Articles by Whiley, R. A.

Streptococcus crista sp. nov., a Viridans Streptococcus with Tufted Fibrils, Isolated from the Human Oral Cavity and Throat

¹Microbiology Research Group, Cell and Structural Biology, Manchester University, Manchester, United Kingdom
²Department of Oral Diagnosis, School of Dental Medicine, University of Connecticut Health Center, Farmington, Connecticut 06032
³Hunterian Dental Research Unit, The London Hospital Medical College, Whitechapel, London, E1 2AD, United Kingdom
⁴Department of Oral Microbiology, The London Hospital Medical College, Whitechapel, London, E1 2AD, United Kingdom

^* Corresponding author.

ABSTRACT

We studied strains of an unusual streptococcus that superficially resembles Streptococcus sanguis but has fibrils that are arranged in lateral tufts. These strains were originally isolated from human throats and oral cavities and have been referred to previously as "Streptococcus sanguis I," the "CR group," and the "tufted-fibril group." Until now, insufficient phenotypic data have been available to allow reliable differentiation of these strains from other viridans streptococcal species, particularly the species in the S. sanguis group. Recently, workers have proposed a scheme of phenetic tests that is based on 4-methylumbelliferyl-linked substrates and conventional biochemical tests and allows the tufted-fibril group to be differentiated; these organisms differ from other viridans species in being able to hydrolyze arginine but not esculin and in producing -L-fucosidase but not β-glucosidase or alkaline phosphatase. These data, together with the results of our DNA-DNA hybridization experiments and the unusual ultrastructure of the tufted-fibril strains as determined by electron microscopy, demonstrate that these organisms represent a new species, for which the name Streptococcus crista is proposed. The DNA base composition is 42.6 to 43.2 mol% G+C. The type strain is strain CR311 (= NCTC 12479).

This article has been cited by other articles:

				M. A. Banner, J. G. Cunniffe, R. L. Macintosh, T. J. Foster, H. Rohde, D. Mack, E. Hoyes, J. Derrick, M. Upton, and P. S. Handley Localized Tufts of Fibrils on Staphylococcus epidermidis NCTC 11047 Are Comprised of the Accumulation-Associated Protein J. Bacteriol., April 1, 2007; 189(7): 2793 - 2804. [Abstract] [Full Text] [PDF]

				A. M. Edwards, T. J. Grossman, and J. D. Rudney Fusobacterium nucleatum Transports Noninvasive Streptococcus cristatus into Human Epithelial Cells Infect. Immun., January 1, 2006; 74(1): 654 - 662. [Abstract] [Full Text] [PDF]

				T. Hoshino, T. Fujiwara, and M. Kilian Use of Phylogenetic and Phenotypic Analyses To Identify Nonhemolytic Streptococci Isolated from Bacteremic Patients J. Clin. Microbiol., December 1, 2005; 43(12): 6073 - 6085. [Abstract] [Full Text] [PDF]

				R. Facklam What Happened to the Streptococci: Overview of Taxonomic and Nomenclature Changes Clin. Microbiol. Rev., October 1, 2002; 15(4): 613 - 630. [Abstract] [Full Text] [PDF]