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P608 Simpleprobe PCR assay for detection of mutations associated with macrolide resistance in mycoplasma genitalium samples
  1. Marianne Gossé,
  2. Hilde Lysvand,
  3. Brita Pukstad,
  4. Svein Arne Nordbø
  1. Norwegian University of Science and Technology, Department of Clinical and Molecular Medicine, Trondheim, Norway


Background Macrolide-resistant strains of Mycoplasma genitalium are an increasing problem throughout the world, and the implementation of a rapid and sensitive assay for mutation detection to guide treatment is needed. Macrolide-resistant strains have been shown to contain base substitutions in positions 2058 and 2059 (Escherichia coli numbering) in region V of the 23S rRNA gene. In this study, we present a SimpleProbe PCR followed by melting curve analysis to differentiate between macrolide-resistant mutants and wild types.

Methods The assay was performed on 159 Mycoplasma genitalium-positive samples, and the results were compared with DNA sequencing. We also looked at the prevalence of macrolide-resistant strains in a Norwegian population.

Results Of 139 samples characterized successfully by sequencing, 54 (39%) were wild types and 85 (61%) were mutants, consisting of 59 (42%) A2059G, 24 (17%) A2058G, 1 (1%) A2058T, and 1 (1%) A2059C mutation. The melting curve analysis correctly differentiated between wild-type and mutant strains in all cases, but it could not identify the different mutant types.

Conclusion The SimpleProbe PCR proved to be a simple, rapid, and reliable method for the detection of macrolide-resistant isolates of Mycoplasma genitalium in a clinical setting.

Disclosure No significant relationships.

  • Mycoplasma genitalium
  • antimicrobial resistance

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