Abstract
Several strains of Chlamydia trachomatis (CT) and C. pneumoniae (CP) from different sources were screened for mycoplasma contamination using a sensitive nested 16S rDNA polymerase chain reaction-specific for a broad range of mycoplasma species. Five of nine CT and 5/16 CP isolates were contaminated by mycoplasma. Mycoplasma fermentans, M. hyorhinis and M. hominis were found as contaminating agents. To our knowledge no data are available on whether coinfection of chlamydia with mycoplasma alters the biological behavior of chlamydia. Analysis of the biological effect of mycoplasma on chlamydial infection showed a profound mycoplasma-induced reduction of chlamydial growth. Mycoplasma were efficiently eliminated from chlamydial cultures in HEp-2 cells by treatment with mupirocin without affecting chlamydial replication or host cell growth. Two chlamydial strains, C. trachomatis serovar K and one clinical isolate of C. pneumoniae were purged by this method.
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