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Journal of Clinical Microbiology, 01 1995, 76-78, Vol 33, No. 1
BM Andersen, RS Weyant, AG Steigerwalt, CW Moss, DG Hollis, RE Weaver, D Ashford and DJ Brenner
Four slightly yellow-pigmented, alpha-hemolytic, gram-negative
coccobacilli, three from wound specimens and one from multiple blood
cultures of a patient with endocarditis, were identified as Neisseria
elongata subsp. glycolytica on the basis of their overall biochemical and
genetic similarities to this subspecies. These strains resembled N.
elongata in their guanine-plus-cytosine contents (55.6 to 57.1 mol%) and in
their overall cellular fatty acid profiles, which are characterized by
large amounts of 16:0, 16:1 omega 7c, and 18:1 omega 7c fatty acids. Their
identities were confirmed by species-level DNA relatedness (hydroxyapatite
method) to the type strains of all three N. elongata subspecies. The
biochemical profiles and cultural characteristics of these strains
resembled those of the type strain of N. elongata subsp. glycolytica except
for the production of a weak yellow growth pigment and alpha-hemolysis on
sheep blood agar. They differed from N elongata subsp. elongata by the
production of catalase, by the production of alpha-hemolysis on sheep blood
agar, and by acid production from D-glucose. They differed from N. elongata
subsp. nitroreducens by the production of catalase and an inability to
reduce nitrate. These studies suggest a pathogenic potential for N.
elongata subsp. glycolytica, usually considered to be a transient colonizer
in humans.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Characterization of Neisseria elongata subsp. glycolytica isolates obtained from human wound specimens and blood cultures
Department of Medical Microbiology, University Hospital of Tromso, Norway.
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