ArticleThe Journal of infectious diseases2024
Clinical Presentation of Early Syphilis and Genomic Sequences of Treponema pallidum Strains in Patient Specimens and Isolates Obtained by Rabbit Inoculation.
Article in The Journal of infectious diseases, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- Sequence variability of BamA and FadL candidate vaccinogens suggests divergent evolutionary paths ofJournal of bacteriology · 2025Article
- The Regulatory Mechanisms of Treponema pallidum Enolase on Macrophages: From Enzymatic Activity to Signal Transduction.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2025Article
- In vitro isolation of contemporary Treponema pallidum strains directly from clinical samples of syphilis patients.Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases · 2025Article
- Insights into Treponema pallidum genomics from modern and ancient genomes using a novel mapping strategy.BMC biology · 2025Article
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23 authors.
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Abstract
backgroundThe global resurgence of syphilis necessitates vaccine development.
methodsWe collected ulcer exudates and blood from 17 participants with primary syphilis (PS) and skin biopsies and blood from 51 patients with secondary syphilis (SS) in Guangzhou, China, for Treponema pallidum subsp pallidum (TPA) quantitative polymerase chain reaction, whole genome sequencing (WGS), and isolation of TPA in rabbits.
resultsTPA DNA was detected in 15 of 17 ulcer exudates and 3 of 17 blood PS specimens. TPA DNA was detected in 50 of 51 SS skin biopsies and 27 of 51 blood specimens. TPA was isolated from 47 rabbits with success rates of 71% (12/17) and 69% (35/51), respectively, from ulcer exudates and SS bloods. We obtained paired genomic sequences from 24 clinical samples and corresponding rabbit isolates. Six SS14- and 2 Nichols-clade genome pairs contained rare discordances. Forty-one of the 51 unique TPA genomes clustered within SS14 subgroups largely from East Asia, while 10 fell into Nichols C and E subgroups.
conclusionsOur TPA detection rate was high from PS ulcer exudates and SS skin biopsies and over 50% from SS blood, with TPA isolation in more than two-thirds of samples. Our results support the use of WGS from rabbit isolates to inform vaccine development.
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