Genomic epidemiology of Treponema pallidum and circulation of strains with diminished tprK antigen variation capability in Seattle, 2021-2022
Lieberman Nicole A.P. 1Nunley Ethan 1Berzkalns Anna 2Reid Tara B. 3Xie Hong 1Avenda?o Carlos 1Golden Matthew R. 4Mohamed Bakhash Shah A. K. 1Soge Olusegun O. 5Greninger Alexander L. 6Giacani Lorenzo7
作者信息
- 1. Department of Laboratory Medicine, University of Washington Medical Center
- 2. Public Health - Seattle & King County
- 3. Department of Medicine, University of Washington Medical Center
- 4. Department of Medicine, University of Washington Medical Center||Public Health - Seattle & King County||Department of Epidemiology, University of Washington||Center for AIDS and STD, University of Washington
- 5. Department of Laboratory Medicine, University of Washington Medical Center||Department of Medicine, University of Washington Medical Center||Department of Global Health, University of Washington||Center for AIDS and STD, University of Washington
- 6. Department of Laboratory Medicine, University of Washington Medical Center||Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center
- 7. Department of Medicine, University of Washington Medical Center||Department of Global Health, University of Washington
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Abstract
Abstract
BackgroundSyphilis incidence continues to increase dramatically in the United States and yet little is known about Treponema pallidum (TP) genomic epidemiology within American metropolitan areas.
MethodsWe performed whole genome sequencing and tprK deep sequencing of 28 TP-containing specimens collected mostly from remnant Aptima swabs from 24 individuals from Seattle Sexual Health Clinic during 2021-2022.
ResultsAll 12 individuals infected with Nichols lineage strains were MSM, while a specific SS14 cluster (average 0.33 SNPs) included 1 MSW and five women. All TP strains sequenced were azithromycin resistant via 23S rRNA A2058G mutation. Identical TP genomic sequences were found in pharyngeal and rectal swab specimens taken from the same individuals concurrently. tprK sequences were less variable between patient-matched specimens and between epidemiologically-linked clusters. We detected a 528 bp deletion in the tprK donor site locus, eliminating nine tprK donor sites, in TP genomes of three individuals with secondary syphilis, associated with diminution of overall tprK sequence diversity.
ConclusionsWe developed an end-to-end workflow for public health genomic surveillance of TP from remnant Aptima swab specimens. With its high rate of gene conversion, tprK sequencing may assist in linking cases beyond routine TP genome sequencing. TP strains with deletions in tprK donor sites currently circulate and are associated with diminished antigenic diversity of the TprK putative outer membrane protein.Key words
Treponema pallidum/syphilis/TprK/genomic epidemiology/whole genome sequencing/gene conversion/antigenic variation/immune evasion引用本文复制引用
Lieberman Nicole A.P.,Nunley Ethan,Berzkalns Anna,Reid Tara B.,Xie Hong,Avenda?o Carlos,Golden Matthew R.,Mohamed Bakhash Shah A. K.,Soge Olusegun O.,Greninger Alexander L.,Giacani Lorenzo.Genomic epidemiology of Treponema pallidum and circulation of strains with diminished tprK antigen variation capability in Seattle, 2021-2022[EB/OL].(2025-03-28)[2026-05-01].https://www.biorxiv.org/content/10.1101/2023.05.12.540601.学科分类
皮肤病学、性病学/医学研究方法/基础医学
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