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Journal of Clinical Microbiology, Sep 1997, 2283-2287, Vol 35, No. 9
M Maurin, F Eb, J Etienne and D Raoult
Diagnosis of Chlamydia or Bartonella infections continues to rely mainly on
serology. However, serological cross-reactions between members of these
genera have recently been described. Sera from eight patients originally
diagnosed as having Chlamydia pneumoniae endocarditis reacted with both
Chlamydia sp. and Bartonella quintana antigens (microimmunofluorescence
technique). Adsorption of sera with B. quintana or C. pneumoniae antigens
removed anti-C. pneumoniae antibodies, whereas adsorption with C.
pneumoniae antigens did not change antibody titers to B. quintana. Western
blot analysis confirmed the presence of cross-reacting antigens and showed
antibody patterns in all sera to be compatible with a Bartonella infection.
These patients were therefore probably suffering from Bartonella-induced
rather than Chlamydia-induced endocarditis. In contrast, sera from 10
patients presumed to be suffering from C. pneumoniae pneumonia did not
display anti-B. quintana antibodies, although cross-reacting antigens were
revealed by Western blotting. This work highlights the possibility that
cases of infective Bartonella endocarditis are erroneously diagnosed as
chlamydial infections.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
Serological cross-reactions between Bartonella and Chlamydia species: implications for diagnosis
Unite des Rickettsies, CNRS UPRESA 6020, Universite de la Mediterranee, Faculte de Medecine, Marseille, France.
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