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Journal of Clinical Microbiology, September 1999, p. 2808-2812, Vol. 37, No. 9
Turku Immunology Centre,
Received 21 December 1998/Returned for modification 31 March
1999/Accepted 26 May 1999
The purpose of the present study was to find out whether patients
with ankylosing spondylitis (AS) carry fecal Klebsiella strains that belong to serotypes or species specific for AS. Somatic serotypes (O groups), capsular (K) serotypes, and biochemically identified species were determined for fecal klebsiellae isolated from
187 AS patients and 195 control patients. The controls were patients
with fibromyalgia or rheumatoid arthritis. The 638 isolates of
Klebsiella that were obtained represented 161 strains; 81 from AS patients and 80 from the controls. The average number of
Klebsiella strains per patient was 1.7 for the AS group and
1.5 for the control group. The most common O group was O1, which was
observed for isolates from 23 of 187 AS patients and 24 of 195 control
patients. Next in frequency was group O2, which was observed for
isolates from 17 AS patients and 15 control patients. Regarding the K
serotypes, 59 different types were identified, revealing a
heterogeneous representation of Klebsiella strains, without
a predominance of any serotype. By biochemical identification,
Klebsiella pneumoniae was the most frequently occurring
species, being found in 45 AS patients and 45 control patients. Next in
the frequency was K. oxytoca, which was observed in 26 AS
patients and in 29 control patients. K. planticola and
K. terrigena occurred in only a minority of patients.
Altogether, when analyzed either separately or simultaneously according
to O groups, K serotypes, and biochemically identified species, no
evidence of the existence of AS-specific Klebsiella strains
was obtained. These findings do not indicate participation of
Klebsiella in the etiopathogenesis of AS.
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Somatic Serogroups, Capsular Types, and Species of
Fecal Klebsiella in Patients with Ankylosing
Spondylitis
*
Corresponding author. Mailing address: Department of
Medical Microbiology, Turku University, FIN-20520 Turku, Finland.
Phone: 358-2-333 7426. Fax: 358-2-233 0008. E-mail:
paatoi{at}utu.fi.
Journal of Clinical Microbiology, September 1999, p. 2808-2812, Vol. 37, No. 9
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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