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J Clin Microbiol. 1991 Jan;29(1):46-50.

Polymerase chain reaction for detection of Mycoplasma genitalium in clinical samples.

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  • 1Mycoplasma Laboratory, Statens Seruminstitut, Copenhagen, Denmark.


We have used the polymerase chain reaction to detect Mycoplasma genitalium in artificially seeded human throat swab samples as well as in clinical material. On the basis of the published nucleotide sequence of the M. genitalium 140-kDa adhesin gene, primers were chosen to produce an amplified fragment of 281 bp. Five different previously isolated strains, including the type strain of M. genitalium, could all be detected by the polymerase chain reaction, and DNAs from other mycoplasmal and bacterial species yielded negative results. The detection limits were estimated to be approximately 50 organisms by inspection of ethidium bromide-stained agarose gels and 4 organisms when a biotinylated oligonucleotide probe was used in filter hybridization. The amplified DNA fragments were subjected to restriction enzyme analysis. DNAs from the five different isolates all possessed EcoRI, SspI, AluI, Sau3AI, and DdeI restriction sites, as predicted from the published sequence. A total of 150 urogenital swabs collected from 100 patients for culturing of Chlamydia trachomatis were tested for the presence of M. genitalium DNA. Ten samples from eight patients were found positive. The amplified DNA fragments from all of our clinical samples possessed the AluI, Sau3AI, and DdeI restriction sites, but three samples from two patients did not contain the SspI site and none of the samples contained the EcoRI site.

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