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T. pallidum

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https://www.readbyqxmd.com/read/29775498/the-jarisch-herxheimer-reaction-in-syphilis-could-molecular-typing-help-to-understand-it-better
#1
M Arando, C Fernandez, M Mota-Foix, A Alvarez, P Armegol, M J Barberá, J Esperalba, M Vall-Mayans
OBJECTIVES: The Jarisch-Herxheimer reaction (JHR) is a febrile inflammatory reaction that may occur in patients after treatment of syphilis. The overall rate is estimated to be 10-25% with broad variations over time. It appears to be related to factors like stage of the disease or reagin titres. In this study we aimed to describe the incidence of and risk factors including strain typing for JHR among patients with syphilis. METHODS: From January through October 2015, 224 consecutive patients (82 of them with HIV) who were diagnosed with early syphilis were enrolled in this prospective observational study in a referral STI clinic in Barcelona...
May 18, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29774840/widespread-treponema-pallidum-infection-in-nonhuman-primates-tanzania
#2
Idrissa S Chuma, Emmanuel K Batamuzi, D Anthony Collins, Robert D Fyumagwa, Luisa K Hallmaier-Wacker, Rudovick R Kazwala, Julius D Keyyu, Inyasi A Lejora, Iddi F Lipende, Simone Lüert, Filipa M D Paciência, Alexander Piel, Fiona A Stewart, Dietmar Zinner, Christian Roos, Sascha Knauf
We investigated Treponema pallidum infection in 8 nonhuman primate species (289 animals) in Tanzania during 2015-2017. We used a serologic treponemal test to detect antibodies against the bacterium. Infection was further confirmed from tissue samples of skin-ulcerated animals by 3 independent PCRs (polA, tp47, and TP_0619). Our findings indicate that T. pallidum infection is geographically widespread in Tanzania and occurs in several species (olive baboons, yellow baboons, vervet monkeys, and blue monkeys)...
June 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29770281/intestinal-spirochetosis-in-an-immunocompetent-patient
#3
Patricia Guzman Rojas, Jelena Catania, Jignesh Parikh, Tran C Phung, Glenn Speth
Intestinal spirochetosis (IS) is an infestation defined by the presence of spirochetes on the surface of the colonic mucosa. The implicated organisms can be Brachyspira aalborgi or Brachyspira pilosicoli . We present the case of a 66-year-old man with a past medical history of diabetes mellitus, hypertension, morbid obesity, and gastroesophageal reflux. The patient was sent to the gastroenterology clinic for a screening colonoscopy due to a prior history of colonic polyps. The patient was completely asymptomatic as he denies any abdominal pain, diarrhea, melena, or hematochezia...
March 15, 2018: Curēus
https://www.readbyqxmd.com/read/29769048/functional-insights-from-proteome-wide-structural-modeling-of-treponema-pallidum-subspecies-pallidum-the-causative-agent-of-syphilis
#4
Simon Houston, Karen Vivien Lithgow, Kara Krista Osbak, Chris Richard Kenyon, Caroline E Cameron
BACKGROUND: Syphilis continues to be a major global health threat with 11 million new infections each year, and a global burden of 36 million cases. The causative agent of syphilis, Treponema pallidum subspecies pallidum, is a highly virulent bacterium, however the molecular mechanisms underlying T. pallidum pathogenesis remain to be definitively identified. This is due to the fact that T. pallidum is currently uncultivatable, inherently fragile and thus difficult to work with, and phylogenetically distinct with no conventional virulence factor homologs found in other pathogens...
May 16, 2018: BMC Structural Biology
https://www.readbyqxmd.com/read/29765114/evaluation-of-the-utility-of-a-rapid-test-for-syphilis-at-a-sexually-transmitted-disease-clinic-in-buenos-aires-argentina
#5
Lucía Gallo Vaulet, Nicolás Morando, Ricardo Casco, Asunta Melgar, Silvia Nacher, Marcelo Rodríguez Fermepin, María A Pando
Even though syphilis can be easily diagnosed by simple and low-cost laboratory methods, it continues to be an important health problem. Rapid tests (RT) for the detection of treponemal antibodies can facilitate earlier diagnosis, access to treatment and linkage to care. The aim of this study was to analyse the usefulness of the incorporation of a RT in the detection of patients infected with T. pallidum in a sexually-transmitted disease (STD) clinic. Between March and December 2015, a syphilis RT was offered to patients who spontaneously attended the clinic...
May 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29739928/sensitive-detection-of-treponema-pallidum-dna-from-the-whole-blood-of-patients-with-syphilis-by-the-nested-pcr-assay
#6
Cuini Wang, Yuanyuan Cheng, Biao Liu, Yuanyuan Wang, Weiming Gong, Yihong Qian, Zhifang Guan, Haikong Lu, Xin Gu, Mei Shi, Pingyu Zhou
The aim of this work was to investigate the application of the nested PCR assay for the detection of Treponema pallidum (TP) DNA from the blood of patients with different stages of syphilis. In this study, a nested PCR method targeting the Tpp47 and polA genes (Tpp47-Tp-PCR and polA-Tp-PCR) was developed to detect TP-DNA in whole blood samples collected from 262 patients with different stages of syphilis (84 primary syphilis, 97 secondary syphilis, and 81 latent syphilis patients). The PCR assay detected T...
May 9, 2018: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/29737273/treatment-outcomes-of-brazilian-inmates-with-treponema-pallidum-and-human-immunodeficiency-virus-infection-a-prospective-cohort-study
#7
Graciela Mendonça Dos Santos Bet, Gleyce Hellen de Almeida de Souza, Júlio Croda, Maísa Estopa Correa, Romário Oliveira de Sales, Ruthe Aline da Silva Santos, Renata Viebrantz Enne Sgarbi, Renata Terumi Shiguematsu Yassuda, Ana Rita Castro Mota Coimbra, Maurício Antônio Pompílio, Simone Simionatto
A prospective cohort study was conducted to evaluate the incidence and treatment outcomes of syphilis and human immunodeficiency virus (HIV) in inmates from Central Brazil. In 2013, 3,363 inmates from 12 prisons in the state of Mato Grosso do Sul were recruited, and 1,614 remained incarcerated after 1 year. The inmates were interviewed, and blood samples were collected for serological testing for Treponema pallidum and HIV infections. Inmates infected with T. pallidum or HIV within the first year were assessed for treatment using prison medical record data, based on Venereal Disease Research Laboratory test results, HIV-1 viral load, and CD4 counts...
May 7, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29737186/asymptomatic-hiv-vertical-transmitted-adolescents-brain-functional-changes-based-on-resting-state-functional-mri
#8
Panying Wang, Jielan Li, Xiangyu Wang, Guang-Yao Wu, Deepa Thapa
OBJECTIVE: Perinatal HIV-infected (PHIV+) adolescents survive longer with the use of readily found combination antiretroviral therapy(cART), however, they still have the risk of developing cognitive deficits. The paper aims to explore the brain functional changes in asymptomatic PHIV+ adolescents with cART based on the resting-state functional MRI (rs-fMRI). MATERIALS AND METHODS: rs-fMRI was performed on 20 PHIV+ adolescents and 28 PHIV- controls to evaluate the regional homogeneity (ReHo) in different brain regions by calculating the Kendall harmonious coefficient(KCC)...
May 8, 2018: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/29703774/-11-c-pk11195-binding-in-alzheimer-disease-and-progressive-supranuclear-palsy
#9
Luca Passamonti, Patricia Vázquez Rodríguez, Young T Hong, Kieren S J Allinson, W Richard Bevan-Jones, David Williamson, P Simon Jones, Robert Arnold, Robin J Borchert, Ajenthan Surendranathan, Elijah Mak, Li Su, Tim D Fryer, Franklin I Aigbirhio, John T O'Brien, James B Rowe
OBJECTIVE: We tested whether in vivo neuroinflammation relates to the distinctive distributions of pathology in Alzheimer disease (AD) and progressive supranuclear palsy (PSP). METHODS: Sixteen patients with symptomatic AD (including amnestic mild cognitive impairment with amyloid-positive PET scan), 16 patients with PSP-Richardson syndrome, and 13 age-, sex-, and education-matched healthy controls were included in this case-control study. Participants underwent [11 C]PK11195 PET scanning, which was used as an in vivo index of neuroinflammation...
April 27, 2018: Neurology
https://www.readbyqxmd.com/read/29701849/origin-of-nontreponemal-antibodies-during-treponema-pallidum-infection-evidence-from-a-rabbit-model
#10
Kun Gao, Xu Shen, Yong Lin, Xiao-Zhen Zhu, Li-Rong Lin, Man-Li Tong, Yao Xiao, Hui-Lin Zhang, Xian-Ming Liang, Jian-Jun Niu, Li-Li Liu, Tian-Ci Yang
The origin of nontreponemal antibodies during syphilis infection is hotly debated. Here, we analysed the immune response in rabbits immunized with various antigens. Inactivated treponemes elicited the production of low-titre nontreponemal antibodies in some rabbits. Cardiolipin combined with bovine serum albumin also induced anti-cardiolipin antibody production. These findings indicate that T. pallidum contained a cardiolipin antigen with weak immunogenicity. However, active T.pallidum induced higher nontreponemal antibody production with strong immunogenicity at an earlier time point, and the antibody titre was consecutive, suggesting the high nontreponemal antibody titre resulted from the combined effects of both the T...
April 25, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29691937/testing-associations-between-cannabis-use-and-subcortical-volumes-in-two-large-population-based-samples
#11
Nathan A Gillespie, Michael C Neale, Timothy C Bates, Lisa T Eyler, Christine Fennema-Notestine, Jasmin Vassileva, Michael J Lyons, Elizabeth C Prom-Wormley, Katie L McMahon, Paul M Thompson, Greig de Zubicaray, Ian B Hickie, John J McGrath, Lachlan T Strike, Miguel E Rentería, Matthew S Panizzon, Nicholas G Martin, Carol E Franz, William S Kremen, Margaret J Wright
BACKGROUND AND AIMS: Disentangling the putative impact of cannabis on brain morphology from other comorbid substance use is critical. After controlling for the effects of nicotine, alcohol and multi-substance use, this study aimed to determine whether frequent cannabis use is associated with significantly smaller subcortical grey matter volumes. DESIGN: Exploratory analyses using mixed linear models, one per region of interest (ROI), were performed whereby individual differences in volume (outcome) at seven subcortical ROIs were regressed onto cannabis and comorbid substance use (predictors)...
April 24, 2018: Addiction
https://www.readbyqxmd.com/read/29676865/detecci%C3%A3-n-de-treponema-pallidum-subespecie-pallidum-para-el-diagn%C3%A3-stico-de-s%C3%A3-filis-cong%C3%A3-nita-mediante-reacci%C3%A3-n-en-cadena-de-la-polimerasa-anidada
#12
Gladys Pinilla, Lesly Campos, Andrea Durán, Jeannette Navarrete, Liliana Muñoz
Introducción. La sífilis es una enfermedad producida por Treponema pallidum subespecie pallidum cuya incidencia mundial es de 12 millones de casos por año, aproximadamente; de estos, más de dos millones se presentan en mujeres gestantes, siendo la sífilis congénita la complicación más grave de esta infección en el embarazo.Objetivo. Detectar la presencia de T. pallidum subespecie pallidum en muestras clínicas para el diagnóstico de sífilis congénita mediante reacción en cadena de la polimerasa (PCR) anidada y determinar su concordancia con las pruebas serológicas...
March 15, 2018: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29656208/akt-mtor-and-nf-%C3%AE%C2%BAb-pathway-activation-in-treponema-pallidum-stimulates-m1-macrophages
#13
Li-Rong Lin, Zheng-Xiang Gao, Yong Lin, Xiao-Zhen Zhu, Wei Liu, Dan Liu, Kun Gao, Man-Li Tong, Hui-Lin Zhang, Li-Li Liu, Yao Xiao, Jian-Jun Niu, Fan Liu, Tian-Ci Yang
The polarization of macrophages and the molecular mechanism involved during the early process of syphilis infection remain unknown. This study was conducted to explore the influence of Treponema pallidum (T. pallidum) treatment on macrophage polarization and the Akt-mTOR-NFκB signaling pathway mechanism involved in this process. M0 macrophages derived from the phorbol-12-myristate-13-acetate-induced human acute monocytic leukemia cell line THP-1 were cultured with T. pallidum. T. pallidum induced inflammatory cytokine (IL-1β and TNF-α) expression in a dose- and time-dependent manner...
April 12, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29650059/labyrinthitis-ossificans-in-a-cynomolgus-macaque-macaca-fascicularis
#14
Gayathriy Balamayooran, Hannah M Atkins, Christopher T Whitlow, Samuel T Aycock, Michael A Nader, J Mark Cline, David L Caudell
Labyrinthitis is inflammation of the membranous and bony labyrinth of the inner ear. Typical portals of entry includehematogenous spread from the cochlear vasculature, passage of otitis media pathogens through the round window, and mostcommonly, meningogenic spread from the subarachnoid space. The sequela of chronic inner ear inflammation is labyrinthitisossificans, in which inner ear structures are replaced by fibrous and osseous tissues. Labyrinthitis in humans has been reportedconcurrently with infection due to various viruses (for example, varicella-zoster, measles, mumps) and bacteria (for example,Treponema pallidum, Streptococcus pneumoniae) and may be associated with vertebrobasilar ischemia and meningitis...
April 12, 2018: Comparative Medicine
https://www.readbyqxmd.com/read/29621949/a-case-of-secondary-syphilis-with-pulmonary-involvement-and-review-of-the-literature
#15
Suttichai Visuttichaikit, Nuntra Suwantarat, Anucha Apisarnthanarak, Pansachee Damronglerd
Syphilis is a sexually transmitted systemic infection caused by Treponema pallidum. We report a case of a heterosexual, HIV-positive man who presented with secondary syphilis and a lung abscess. A bacterial lung abscess was suspected and a computed tomography-guided percutaneous needle aspiration of the lung abscess was performed. Direct pulmonary involvement by T. pallidum was suggested by a positive PCR result on the aspirated fluid specimen. The clinical signs of secondary syphilis improved, and the lung abscess was resolved after treatment with benzathine penicillin G and amoxicillin-clavulanate...
January 1, 2018: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/29604973/other-central-nervous-system-infections-cytomegalovirus-mycobacterium-tuberculosis-and-treponema-pallidum
#16
Christina M Marra
Human immunodeficiency virus (HIV)-infected individuals are particularly susceptible to several central nervous system infections: human cytomegalovirus, which may cause encephalitis, ventriculitis, polyradiculitis, or polyradiculomyelitis; Mycobacterium tuberculosis, which can cause meningitis or space-occupying lesions; and Treponema pallidum subspecies pallidum (T. pallidum), which affects the meninges, cerebrospinal fluid, cranial nerves, and vasculature in early neurosyphilis, and additionally the brain and spinal cord parenchyma in late neurosyphilis...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29602529/neurosyphilis-as-a-cause-of-transverse-myelitis-in-a-teenage-girl
#17
Karen Kim Jo Yaphockun, Shannon Wai
BACKGROUND: Syphilis is a sexually transmitted infection that was nearly eradicated in 2001 but is now making a resurgence. It has a wide range of clinical manifestations depending on disease stage. Neurosyphilis is an infrequently seen infectious disease with central nervous system involvement that can occur in either early- or late-stage syphilis. The diagnosis of neurosyphilis is challenging, primarily because Treponema pallidum, the infecting organism, cannot be cultured in vitro...
March 27, 2018: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29596224/cdc-syphilis-summit-diagnostics-and-laboratory-issues
#18
Allan Pillay
Syphilis, caused by the bacterium Treponema pallidum, is on the rise in the United States (US) particularly among men who have sex with men (MSM). The disease is complex with varied clinical manifestations and challenges remain in the laboratory diagnostic setting because T. pallidum is non-cultivable and no single test can accurately diagnose all stages of the disease. There are missed opportunities for the use of direct detection tests in primary and secondary (P&S) syphilis. The increasing use of different reverse sequence algorithms for serology testing without validation in populations with varying risks for syphilis makes the interpretation of test results difficult; this has led to concerns about diagnostic errors or overtreatment...
March 29, 2018: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/29584599/alterations-of-white-matter-connectivity-in-preschool-children-with-autism-spectrum-disorder
#19
Shi-Jun Li, Yi Wang, Long Qian, Gang Liu, Shuang-Feng Liu, Li-Ping Zou, Ji-Shui Zhang, Nan Hu, Xiao-Qiao Chen, Sheng-Yuan Yu, Sheng-Li Guo, Ke Li, Mian-Wang He, Hai-Tao Wu, Jiang-Xia Qiu, Lei Zhang, Yu-Lin Wang, Xin Lou, Lin Ma
Purpose To investigate the topologic architecture of white matter connectivity networks in preschool-aged children with a diagnosis of autism spectrum disorder (ASD) versus typical development (TD). Materials and Methods Forty-two participants were enrolled, including 21 preschool children with ASD (14 male children and seven female children; mean age, 4.56 years ± 0.97 [standard deviation]) and 21 children with TD (11 males and 10 females; mean age, 5.13 years ± 0.82). The diagnosis of ASD was determined according to the Diagnostic and Statistical Manual of Mental Disorders Global Assessment of Functioning scores (mean score, 8...
March 27, 2018: Radiology
https://www.readbyqxmd.com/read/29551989/could-arterial-spin-labeling-distinguish-patients-in-minimally-conscious-state-from-patients-in-vegetative-state
#20
Bing Wu, Yi Yang, Shuai Zhou, Wei Wang, Zizhen Wang, Gang Hu, Jianghong He, Xinhuai Wu
Purpose: Diagnostic error is common among patients with vegetative state (VS) and minimally conscious state (MCS). The purpose of this article is to use three-dimensional pseudo-continuous arterial spin labeling (pcASL) to compare cerebral blood flow (CBF) patterns in patients in MCS with those in VS. Methods: Patients meeting MCS and VS criteria were identified. Two post-labeling delay (PLD) time pcASL on 3.0-Tesla magnetic resonance imaging scanner system were performed with patients in the resting awake state...
2018: Frontiers in Neurology
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