Abstract:
BACKGROUND:Treponema pallidum subsp. endemicum (TEN) is the causative agent of endemic syphilis (bejel). An unusual human TEN 11q/j isolate was obtained from a syphilis-like primary genital lesion from a patient that returned to France from Pakistan. METHODOLOGY/PRINCIPAL FINDINGS:The TEN 11q/j isolate was characterized using nested PCR followed by Sanger sequencing and/or direct Illumina sequencing. Altogether, 44 chromosomal regions were analyzed. Overall, the 11q/j isolate clustered with TEN strains Bosnia A and Iraq B as expected from previous TEN classification of the 11q/j isolate. However, the 11q/j sequence in a 505 bp-long region at the TP0488 locus was similar to Treponema pallidum subsp. pallidum (TPA) strains, but not to TEN Bosnia A and Iraq B sequences, suggesting a recombination event at this locus. Similarly, the 11q/j sequence in a 613 bp-long region at the TP0548 locus was similar to Treponema pallidum subsp. pertenue (TPE) strains, but not to TEN sequences. CONCLUSIONS/SIGNIFICANCE:A detailed analysis of two recombinant loci found in the 11q/j clinical isolate revealed that the recombination event occurred just once, in the TP0488, with the donor sequence originating from a TPA strain. Since TEN Bosnia A and Iraq B were found to contain TPA-like sequences at the TP0548 locus, the recombination at TP0548 took place in a treponeme that was an ancestor to both TEN Bosnia A and Iraq B. The sequence of 11q/j isolate in TP0548 represents an ancestral TEN sequence that is similar to yaws-causing treponemes. In addition to the importance of the 11q/j isolate for reconstruction of the TEN phylogeny, this case emphasizes the possible role of TEN strains in development of syphilis-like lesions.
journal_name
PLoS Negl Trop Disjournal_title
PLoS neglected tropical diseasesauthors
Mikalová L,Strouhal M,Oppelt J,Grange PA,Janier M,Benhaddou N,Dupin N,Šmajs Ddoi
10.1371/journal.pntd.0005434subject
Has Abstractpub_date
2017-03-06 00:00:00pages
e0005434issue
3eissn
1935-2727issn
1935-2735pii
PNTD-D-16-02077journal_volume
11pub_type
杂志文章abstract:INTRODUCTION:Schistosomiasis is a chronic parasitic trematode disease that affects over 240 million people worldwide. The Schistosoma lifecycle is complex, involving transmission via specific intermediate-host freshwater snails. Predictive mathematical models of Schistosoma transmission have often chosen to simplify or...
journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
doi:10.1371/journal.pntd.0006514
更新日期:2018-05-21 00:00:00
abstract:BACKGROUND:Human movement is a key behavioral factor in many vector-borne disease systems because it influences exposure to vectors and thus the transmission of pathogens. Human movement transcends spatial and temporal scales with different influences on disease dynamics. Here we develop a conceptual model to evaluate ...
journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
doi:10.1371/journal.pntd.0000481
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abstract::Leishmaniasis is a serious global health problem affecting many people worldwide. While patients with leishmaniasis can be treated with several agents, drug toxicicty and the emergence of resistant strains render available treatments ineffective in the long run. Inhibitors of the mammalian target of rapamycin (mTOR) h...
journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
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abstract:BACKGROUND:The World Health Organization (WHO) recommends oral cholera vaccines (OCVs) as a supplementary tool to conventional prevention of cholera. Dukoral, a killed whole-cell two-dose OCV, was used in a mass vaccination campaign in 2009 in Zanzibar. Public and private costs of illness (COI) due to endemic cholera a...
journal_title:PLoS neglected tropical diseases
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doi:10.1371/journal.pntd.0001844
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journal_title:PLoS neglected tropical diseases
pub_type: 历史文章,杂志文章
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abstract::The 2015-2017 epidemics of Zika virus (ZIKV) in the Americas caused widespread infection, followed by protective immunity. The timing and burden of the next Zika virus outbreak remains unclear. We used an agent-based model to simulate the dynamics of age-specific immunity to ZIKV, and predict the future age-specific r...
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journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章,评审
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journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章,随机对照试验
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journal_title:PLoS neglected tropical diseases
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journal_title:PLoS neglected tropical diseases
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journal_title:PLoS neglected tropical diseases
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abstract::Simian T-Leukemia Virus type 1 and Simian Foamy Virus infect non-human primates. While STLV-1, as HTLV-1, causes Adult T-cell Leukemia/lymphoma, SFV infection is asymptomatic. Both retroviruses can be transmitted from NHPs to humans through bites that allow contact between infected saliva and recipient blood. Because ...
journal_title:PLoS neglected tropical diseases
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abstract:BACKGROUND:Urogenital schistosomiasis due to Schistosoma haematobium is a serious underestimated public health problem affecting 112 million people - particularly in sub-Saharan Africa. Microscopic examination of urine samples to detect parasite eggs still remains as definitive diagnosis. This work was focussed on deve...
journal_title:PLoS neglected tropical diseases
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doi:10.1371/journal.pntd.0003963
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abstract::Canine rabies was endemic pre-urbanisation, yet little is known about how it persists in small populations of dogs typically seen in rural and remote regions. By simulating rabies outbreaks in such populations (50-90 dogs) using a network-based model, our objective was to determine if rabies-induced behavioural change...
journal_title:PLoS neglected tropical diseases
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journal_title:PLoS neglected tropical diseases
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journal_title:PLoS neglected tropical diseases
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journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
doi:10.1371/journal.pntd.0003942
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journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章,评审
doi:10.1371/journal.pntd.0005840
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journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
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journal_title:PLoS neglected tropical diseases
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doi:10.1371/journal.pntd.0001016
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pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:PLoS neglected tropical diseases
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更新日期:2015-07-14 00:00:00
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journal_title:PLoS neglected tropical diseases
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doi:10.1371/journal.pntd.0002065
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doi:10.1371/journal.pntd.0005628
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abstract:BACKGROUND:The soil-dwelling saprophyte bacterium Burkholderia pseudomallei is the cause of melioidosis, a severe disease of humans and animals in southeast Asia and northern Australia. Despite the detection of B. pseudomallei in various soil and water samples from endemic areas, the environmental habitat of B. pseudom...
journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
doi:10.1371/journal.pntd.0000364
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abstract::Rift Valley fever virus is an arbovirus that affects both livestock and humans throughout Africa and in the Middle East. Despite its endemicity throughout Africa, it is a rare event to identify an infected individual during the acute phase of the disease and an even rarer event to collect serial blood samples from the...
journal_title:PLoS neglected tropical diseases
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更新日期:2018-05-04 00:00:00
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journal_title:PLoS neglected tropical diseases
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doi:10.1371/journal.pntd.0005922
更新日期:2017-10-05 00:00:00
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journal_title:PLoS neglected tropical diseases
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doi:10.1371/journal.pntd.0002887
更新日期:2014-05-22 00:00:00