The British Journal of Rheumatology, Vol 37, 1299-1302, Copyright © 1998 by British Society for Rheumatology
O Maki-Ikola, M Nissila, K Lehtinen and K Granfors
OBJECTIVE: To investigate the possible predominance of certain Klebsiella
pneumoniae capsular types in the pathogenesis of ankylosing spondylitis
(AS). METHODS: The prevalence of IgA class antibodies against three
different K. pneumoniae strains (with capsular types 21, 30 and 43) was
studied in the sera of 177 patients with AS and of 100 healthy blood donors
using an enzyme-linked immunosorbent assay. RESULTS: The median
Klebsiella-specific antibody levels were always higher in patients than in
controls regardless of the serotype used as antigen. When the prevalence of
increased antibody levels was compared between the groups, it was highest
against the strain with capsular type 30, whereas against strains 21 and 43
it was similar among patients and controls. CONCLUSIONS: A broad range of
Klebsiella serotypes may be involved in the pathogenesis of AS. Thus, it is
important to take the different Klebsiella serotypes into particular
account in these studies.
ORIGINAL PAPERS
IgA class serum antibodies against three different Klebsiella serotypes in ankylosing spondylitis
National Public Health Institute, Department in Turku, Finland.
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