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Journal of Clinical Microbiology, September 1998, p. 2618-2622, Vol. 36, No. 9
Department of Pathology, Division of
Microbiology, Johns Hopkins Hospital, Baltimore, Maryland
21287-7093
Received 17 February 1998/Returned for modification 30 March
1998/Accepted 16 June 1998
CDC group IVc-2 is a gram-negative, oxidase-positive,
nonfermentative bacillus that has been implicated in human infections, including septicemia and peritonitis. Biochemically it most closely resembles Bordetella bronchiseptica and
Alcaligenes sp. Results of cellular fatty acid (CFA) and
16S rRNA gene analysis were combined with biochemical data to
assist in identification and classification. The predominant CFAs were
hexadecanoic acid (16:0), cis-9-hexadecanoic acid
(16:1
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Phenotypic and Genotypic Characterization of
Clinical Strains of CDC Group IVc-2
7c), cis-11-octadecanoic acid (18:1
7c), and
-cis-9,10-methylenehexadecanoic acid (17:0cyc). Small
amounts (2 to 5%) of 3-hydroxytetradecanoic acid (3-OH-14:0),
tetradecanoic acid (14:0), 2-hydroxyhexadecanoic acid (2-OH-16:0), and
-cis-11,12-methyleneoctadecanoic acid (19:0cyc) were
also consistently present. The highest 16S rRNA gene similarity was
with Ralstonia eutropha and Ralstonia
solanacearum. The CFA and 16S rRNA gene sequence data support the
inclusion of CDC group IVc-2 in the recently created genus
Ralstonia, which includes R. eutropha, R. pickettii, and R. solanacearum.
*
Corresponding author. Mailing address: Department of
Pathology, Division of Microbiology, Meyer B1-193, Johns Hopkins
Hospital, 600 North Wolfe St., Baltimore, MD 21287-7093. Phone: (410)
955-5077. Fax: (410) 614-8087. E-mail:
jdick{at}pathlan.path.jhu.edu.
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