Protocol for the rapid detection of the urogenital tract mollicutes and Chlamydia with concomitant LGV-(sub)typing.

Urogenital tract infections can be caused by a number of pathogens, some of which, like the obligate intracellular Chlamydia trachomatis, are difficult to culture, or the cell wall-less mollicutes, like M. hominis or Ureaplasma spp. Real-time PCR (qPCR) has become an important diagnostic tool as it enables not only the species-specific detection of the organism but also the quantification essential to define the etiological relevance of a facultative pathogenic bacterium. We developed a set of TaqMan qPCRs for the detection of the species M. genitalium and M. hominis (Mh/Mg-duplex qPCR), U. parvum and U. urealyticum (Uu/Up duplex-PCR), and C. trachomatis (CT-qPCR), and for typing of lymphogranuloma venereum-associated L-serovars of C. trachomatis (LGV-qPCR) as well as a sub-typing of L1, L2, and L3. In addition, the human gap-gene was amplified as quality control of the specimen, and a cryptic plasmid co-amplified in CT-qPCR as an inhibition control. The present protocol focuses on the step-by-step description for the establishment of these TaqMan multiplex qPCRs.