Publication details

Multi-locus sequence typing of Treponema pallidum subsp pallidum present in clinical samples from France: Infecting treponemes are genetically diverse and belong to 18 allelic profiles

Authors

POSPÍŠILOVÁ Petra GRANGE Philippe Alain GRILLOVÁ Linda PAŠTĚKOVÁ Lenka MARTINET Pervenche JANIER Michel VERMERSCH Annie BENHADDOU Nadjet DEL GIUDICE Pascal ALCARAZ Isabelle TRUCHETET Francois DUPIN Nicolas ŠMAJS David

Year of publication 2018
Type Article in Periodical
Magazine / Source Plos one
MU Faculty or unit

Faculty of Medicine

Citation
Doi http://dx.doi.org/10.1371/journal.pone.0201068
Keywords Treponema pallidum
Description Treponema pallidum subsp. pallidum, the causative agent of sexually transmitted syphilis, detected in clinical samples from France, was subjected to molecular typing using the recently developed Multilocus Sequence Typing system. The samples (n = 133) used in this study were collected from 2010-2016 from patients with diagnosed primary or secondary syphilis attending outpatient centers or hospitals in several locations in France. Altogether, 18 different allelic profiles were found among the fully typed samples (n = 112). There were five allelic variants identified for TP0136, 12 for TP0548, and eight for TP0705. Out of the identified alleles, one, seven, and three novel alleles were identified in TP0136, TP0548, and TP0705, respectively. Partial allelic profiles were obtained from 6 samples. The majority of samples (n = 110) belonged to the SS14-like cluster of TPA isolates while 7 clustered with Nichols-like isolates. Patients infected with Nichols-like samples were more often older (p = 0.041) and more often diagnosed with secondary syphilis (p = 0.033) compared to patients infected with SS14-like samples. In addition, macrolide resistance caused by the A2058G mutation was found to be associated with allelic profile 1.3.1 or with strains belonging to the 1.3.1 lineage (p<0.001). The genetic diversity among TPA strains infecting the European population was surprisingly high, which suggests that additional studies are needed to reveal the full genetic diversity of TPA pathogens infecting humans.
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