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 Microbioljournal_title
Journal of clinical microbiologyauthors
Jantos CA,Heck S,Roggendorf R,Sen-Gupta M,Hegemann JHdoi
10.1128/JCM.35.3.620-623.1997subject
Has Abstractpub_date
1997-03-01 00:00:00pages
620-3issue
3eissn
0095-1137issn
1098-660Xjournal_volume
35pub_type
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