Antigenic and molecular analyses of different Chlamydia pneumoniae strains.

Abstract:

:Chlamydia pneumoniae is an important human respiratory pathogen. Classification of C. pneumoniae isolates into distinguishable serovars or genotypes has not yet been reported. To determine whether antigenic or molecular variants among C. pneumoniae isolates exist, six strains were studied via immunoblot analysis and DNA sequence determination of the entire major outer membrane protein (MOMP) gene omp1. The strains included four prototype strains and two clinical isolates from our laboratory. Immunoblot analysis of sera from patients infected with C. pneumoniae revealed antigenic differences between the C. pneumoniae strains. Strong reactivity of one serum sample with a 65-kDa protein in two C. pneumoniae strains which was not observed with the other strains was the most prominent finding. All sera reacted with the 40-kDa MOMP. Comparison of the omp1 DNA sequences revealed that the omp1 genes of all strains were identical and were 100% identical to the sequence of the omp1 gene of C. pneumoniae AR-39. The results of this study demonstrate that unlike C. trachomatis, the omp1 gene is conserved in C. pneumoniae. Furthermore, it was shown that C. pneumoniae strains are antigenically different. This finding indicates that more than one serovar of C. pneumoniae exist.

journal_name

J Clin Microbiol

authors

Jantos CA,Heck S,Roggendorf R,Sen-Gupta M,Hegemann JH

doi

10.1128/JCM.35.3.620-623.1997

subject

Has Abstract

pub_date

1997-03-01 00:00:00

pages

620-3

issue

3

eissn

0095-1137

issn

1098-660X

journal_volume

35

pub_type

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