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https://www.readbyqxmd.com/read/28104616/sequential-colonization-of-periodontal-pathogens-in-induction-of-periodontal-disease-and-atherosclerosis-in-ldlrnull-mice
#1
Sasanka S Chukkapalli, Meena Easwaran, Mercedes F Rivera-Kweh, Irina M Velsko, Sriram Ambadapadi, Jiayin Dai, Hannu Larjava, Alexandra R Lucas, Lakshmyya Kesavalu
Periodontal disease (PD) and atherosclerotic vascular disease (ASVD) are both chronic inflammatory diseases with a polymicrobial etiology and have been epidemiologically associated. The purpose is to examine whether periodontal bacteria that infect the periodontium, can also infect vascular tissues and enhance pre-existing early aortic atherosclerotic lesions in LDLR(null) mice. Mice were orally infected with intermediate bacterial colonizer Fusobacterium nucleatum for the first 12 weeks followed by late bacterial colonizers (Porphyromonas gingivalis, Treponema denticola and Tannerella forsythia) for the remaining 12 weeks mimicking the human oral microbiota ecological colonization...
January 18, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28100313/rectinema-cohabitans-gen-nov-sp-nov-a-rod-shaped-spirochete-isolated-from-an-anaerobic-naphthalene-degrading-enrichment-culture
#2
Janina S Koelschbach, Housna Mouttaki, Carolin Pickl, Hermann J Heipieper, Reinhard Rachel, Paul A Lawson, Rainer U Meckenstock
The anaerobic, non-motile strain HMT was isolated from the naphthalene-degrading, sulfate-reducing enrichment culture N47. Since 20 years, strain HMT has been a stable member of culture N47 although it is neither able to degrade naphthalene nor to reduce sulfate in pure culture. The highest similarity of the 16S rRNA gene sequence of strain HMT (89%) is with a cultivated member of the family Spirochaetaceae, Treponema caldarium sp. strain H1T (DSM 7334T), an obligately anaerobic, thermophilic spirochete isolated from cyanobacterial mat samples collected at a freshwater hot spring in Oregon, USA...
January 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28099577/effects-of-periodontal-treatment-on-primary-sj%C3%A8-gren-s-syndrome-symptoms
#3
Lucas Macedo Batitucci Ambrósio, Emanuel da Silva Rovai, Bruno Nunes de França, Danilo Andrés Balzarini, Ieda Santos Abreu, Sheyla Batista Bologna Lopes, Thaís Borguezan Nunes, Silvia Vanessa Lourenço, Sandra Gofinet Pasoto, Luciana Saraiva, Marinella Holzhausen
The aim of this longitudinal prospective study was to evaluate the effects of periodontal treatment on the clinical, microbiological and immunological periodontal parameters, and on the systemic activity (ESSDAI) and subjective (ESSPRI) indexes in patients with primary Sjögren's Syndrome (pSS). Twenty-eight female patients were divided into four groups: pSS patients with or without chronic periodontitis (SCP, SC, respectively), and systemically healthy patients with or without chronic periodontitis (CP, C, respectively)...
January 16, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28093460/a-double-edged-sword-does-highly-active-antiretroviral-therapy-contribute-to-syphilis-incidence-by-impairing-immunity-to-treponema-pallidum
#4
REVIEW
Michael L Rekart, Wilfred Ndifon, Robert C Brunham, Jonathan Dushoff, Sang Woo Park, Sanjana Rawat, Caroline E Cameron
BACKGROUND AND HYPOTHESIS: Recently, the world has experienced a rapidly escalating outbreak of infectious syphilis primarily affecting men who have sex with men (MSM); many are taking highly active antiretroviral therapy (HAART) for HIV-1 infection. The prevailing hypothesis is that HAART availability and effectiveness have led to the perception among both individuals who are HIV-1 infected and those who are uninfected that HIV-1 transmission has become much less likely, and the effects of HIV-1 infection less deadly...
January 16, 2017: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/28089378/butyrate-production-under-aerobic-growth-conditions-by-engineered-escherichia-coli
#5
Naoya Kataoka, Alisa S Vangnai, Thunyarat Pongtharangkul, Toshiharu Yakushi, Kazunobu Matsushita
Butyrate is an important industrial platform chemical. Although several groups have reported butyrate production under oxygen-limited conditions by a native producer, Clostridium tyrobutylicum, and by a metabolically engineered Escherichia coli, efforts to produce butyrate under aerobic growth conditions have met limited success. Here, we constructed a novel butyrate synthetic pathway that functions under aerobic growth conditions in E. coli, by modifying the 1-butanol synthetic pathway reported previously...
January 11, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28079920/serum-microrna-profiles-in-patients-with-syphilis
#6
Ping Lu, Chang Fang, Qing Cheng, Wu-Jian Ke, Tao Huang, Jun Zhang, He-Ping Zheng, Bin Yang
Syphilis is an acute and chronic inflammatory disorder caused by the non-cultivatable spirochete Treponema pallidum subsp. pallidum (T. pallidum).(1,2) T. pallidum does not produce any known toxic proteins; therefore, most of the symptoms and tissue damage related to syphilis are caused by activation of the host's inflammatory and immune responses,(3) thus suggesting that host genetics play an important role in regulating the progression of syphilis infection. MiRNAs are a class of 19- to 24-nt noncoding RNAs that influence many biological systems, including development, cellular differentiation, proliferation, apoptosis, metabolism, and the immune response;(4-6) they also play crucial roles during microbial infection...
January 12, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28068479/secretable-small-rnas-via-outer-membrane-vesicles-in-periodontal-pathogens
#7
J-W Choi, S-C Kim, S-H Hong, H-J Lee
MicroRNAs (miRNAs) have been shown to be major regulators of eukaryotic gene expression. However, bacterial RNAs comparable in size to eukaryotic miRNAs (18-22 nucleotides) have received little attention. Recently, a novel class of small RNAs similar in size to miRNAs (miRNA-size, small RNAs or msRNAs) have also been found in several bacteria. Like miRNAs, msRNAs are approximately 15 to 25 nucleotides in length, and their precursors are predicted to form a hairpin loop secondary structure. Here, we identified msRNAs in the periodontal pathogens Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, and Treponema denticola...
January 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28058468/-nonviral-sexually-transmitted-infections-epidemiology-clinical-manifestations-diagnostic-workup-therapy-part%C3%A2-3-treponemes-gardnerella-and-trichomonads
#8
REVIEW
P Nenoff, A Manos, I Ehrhard, C Krüger, U Paasch, P Helmbold, W Handrick
In Germany, the reported syphilis prevalence has increased continuously since 2010, with a total of 6834 syphilis cases being reported in 2015. The largest increase of reported syphilis occurred in men who have sex with men (MSM). The antibiotic agent of choice for treatment of syphilis is still penicillin. There are no penicillin-resistant Treponema pallidum strains. Alternatives are ceftriaxone and doxycycline. In Germany, azithromycin is not approved for treatment of syphilis; however, therapy failures are increasingly reported...
January 5, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28050984/evaluation-of-bacteriological-profile-in-the-apical-root-segment-of-the-patients-with-primary-apical-periodontitis
#9
Aravind Tatikonda, N Sudheep, Krishna P Biswas, K Gowtham, Sudarshan Pujari, Padam Singh
INTRODUCTION: Apical periodontitis usually results from bacterial accumulation and contamination occurring in the root-canal system, and extending beyond the apical foramen to involve the periapical tissues. Literature has a paucity of the studies that stress on the division and analysis of the pulp canal segments. The reason for this disparity might be the technique used for collecting the samples from the pulp canals. Hence, we carried out the present study to evaluate the microbial flora in the apical part of the roots with necrotic pulp canals...
January 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28033297/could-lengthening-minocycline-therapy-better-treat-early-syphilis
#10
Li-Li Shao, Rui Guo, Wei-Jie Shi, Yuan-Jun Liu, Bin Feng, Long Han, Quan-Zhong Liu
Syphilis is a sexually transmitted disease caused by Treponema pallidum. Minocycline, a representative tetracycline derivative, has the greatest antimicrobial activity among all tetracyclines. There are few reports about treating syphilis with minocycline because there is a lack of efficacy data from controlled trials. We compared the rates of serological cure in patients with early syphilis who were treated with minocycline or benzathine penicillin G (BPG).During the study period, a total of 40 syphilis patients received the BPG treatment, which was a single intramuscular dose of 2...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28029229/on-site-test-to-detect-syphilis-in-pregnancy-a-systematic-review-of-test-accuracy-studies
#11
REVIEW
E Rogozińska, L Kara-Newton, J R Zamora, K S Khan
BACKGROUND: Syphilis in pregnancy can lead to fetal and neonatal death or congenital anomalies. Accurate on-site tests are an essential part of effective prevention of mother-to-child transmission of the disease. OBJECTIVE: This systematic review assessed the accuracy of on-site tests to detect infection with Treponema pallidum in pregnant women. SEARCH STRATEGY: Major databases were searched from inception to January 2016 using terms: 'pregnancy', 'antenatal', 'syphilis', 'Treponema pallidum' with their variations, and the search limit for the relevant study design...
December 28, 2016: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28018496/an-experimental-model-of-peripheral-vascular-disease-involving-the-intravenous-injection-of-oral-bacteria
#12
Kimihiro Igari, Yoshinori Inoue, Takehisa Iwai
Objective: The purpose of this study was to observe the direct effects of oral bacteria, such as Porphyromonas gingivalis (Pg) and Treponema denticola (Td), on the peripheral vasculature. Materials and Methods: Beagles were directly injected (at various doses) with Pg or Td. Each leg vein was exposed, ligated at proximal and distal sites, and then injected with bacteria diluted with sterile saline. The collected vascular tissue was examined microscopically, and samples of the vascular tissue and blood were cultured and then subjected to the polymerase chain reaction (PCR) in order to detect the bacterial deoxyribonucleic acid (DNA)...
2016: Annals of Vascular Diseases
https://www.readbyqxmd.com/read/28009086/1-2-diacylglycerol-choline-phosphotransferase-catalyzes-the-final-step-in-the-unique-treponema-denticola-phosphatidylcholine-biosynthesis-pathway
#13
Miguel Ángel Vences-Guzmán, M Paula Goetting-Minesky, Ziqiang Guan, Santiago Castillo-Ramirez, Luz América Córdoba-Castro, Isabel M López-Lara, Otto Geiger, Christian Sohlenkamp, J Christopher Fenno
Treponema denticola synthesizes phosphatidylcholine through a licCA-dependent CDP-choline pathway identified only in the genus Treponema. However, the mechanism of conversion of CDP-choline to phosphatidylcholine remained unclear. We report here characterization of TDE0021 (herein designated cpt) encoding a 1,2-diacylglycerol choline phosphotransferase homologous to choline phosphotransferases that catalyze the final step of the highly conserved Kennedy pathway for phosphatidylcholine synthesis in eukaryotes...
December 23, 2016: Molecular Microbiology
https://www.readbyqxmd.com/read/27998453/-clinical-features-of-neurosyphilis-with-optic-neuritis-as-an-initial-finding
#14
S S Cao, H Y Li, Q G Xu, S Y Tan, S H Wei
Objective: To study the characteristics of neurosyphilis with optic neuritis as an initial finding. Methods: Retrospective analysis of clinical data and laboratory testing results of 16 cases (27 eyes) with optic neuritis as an initial finding of neurosyphilis from October 2010 to March 2015 in General Hospital of People's Liberation Army was made. Results: Six-teen patients (12 males, 4 females) were collected, the median age of patients was 47 (range 33 to 65) years ,the mean age was (49.63±9.05) years. Treponema pallidum particle agglutination assay (TPPA) analysis was positive in all of the patients and rapid plasma reagin (RPR) test was positive in 14 patients (2 patients did not test)...
December 11, 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27994415/detection-of-porphyromonas-gingivalis-and-treponema-denticola-in-chronic-and-aggressive-periodontitis-patients-a-comparative-polymerase-chain-reaction-study
#15
Ramniwas M Kumawat, Sindhu M Ganvir, Vinay K Hazarey, Asifa Qureshi, Hemant J Purohit
BACKGROUND: The detection frequency of Porphyromonas gingivalis and Treponema denticola in chronic periodontitis (CP) and aggressive periodontitis (AgP) is not explored well in Indian population. AIM: The study was undertaken to detect P. gingivalis and T. denticola in CP as well as in AgP patients using polymerase chain reaction (PCR), and to determine the relationship between the frequency of these two microorganisms and the severity of clinical periodontal parameters...
October 2016: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/27993382/syphilis
#16
REVIEW
Edward W Hook
Syphilis is a chronic bacterial infection caused by Treponema pallidum that is endemic in low-income countries and and occurs at lower rates in middle-income and high-income countries. The disease is of both individual and public health importance and, in addition to its direct morbidity, increases risk of HIV infection and can cause lifelong morbidity in children born to infected mothers. Without treatment the disease can progress over years through a series of clinical stages and lead to irreversible neurological or cardiovascular complications...
December 16, 2016: Lancet
https://www.readbyqxmd.com/read/27988129/source-of-supplemental-dietary-copper-zinc-and-manganese-affects-fecal-microbial-relative-abundance-in-lactating-dairy-cows
#17
M J Faulkner, B A Wenner, L M Solden, W P Weiss
Appropriate trace mineral supplementation can improve immune response and hoof health in cattle and at much higher rates of supplementation to swine and poultry can alter microbial colonization of the gut, resulting in improved gut health. Diet can influence fecal microbial excretion in cattle, and the fecal microbiome may serve as a means for assessing gastrointestinal microbial changes. We hypothesized that feeding diets that differed in source of supplemental Cu, Zn, or Mn would alter the relative abundance of fecal microbes in lactating dairy cattle and that organic Zn would have the greatest effect...
December 14, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27988126/effect-of-high-oleic-acid-soybeans-on-production-performance-milk-fatty-acid-composition-and-enteric-methane-emission-in-dairy-cows
#18
J C Lopes, M T Harper, F Giallongo, J Oh, L Smith, A M Ortega-Perez, S A Harper, A Melgar, D M Kniffen, R A Fabin, A N Hristov
The objective of this study was to investigate the effect of 3 soybean sources differing in fatty acid profile and processing method on productivity, milk composition, digestibility, rumen fermentation, and enteric methane emission in lactating dairy cows. The soybean sources were conventional, high-linoleic-acid variety extruded soybean meal (ESBM; 8.7% ether extract with 15% oleic and 54% linoleic acids); extruded Plenish (DuPont Pioneer, Johnston, IA), high-oleic-acid variety soybean meal (EPSBM; 8.4% ether extract with 73% oleic and 8% linoleic acids); and whole, heated Plenish soybeans (WPSB; 20...
December 14, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27982548/syphilitic-aortitis-and-its-complications-in-the-modern-era
#19
Francesco Drago, Giulia Merlo, Alfredo Rebora, Aurora Parodi
INTRODUCTION: Aortitis is a well recognized manifestation of the tertiary stage of syphilis. EVIDENCE ACQUISITION: Although often regarded as an unexpected diagnosis, actually new cases of cardiovascular syphilis continue to be reported. Presumably, Treponema pallidum invades the aortic wall and the inflammatory response progresses towards obliterative endarteritis and necrosis of the muscular and elastic fibers in the aortic media. The consequent weakening of the aortic wall can lead to severe complications, represented by aortic aneurysm, aortic valvular insufficiency, aortic root dilation and coronary ostial stenosis...
December 16, 2016: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
https://www.readbyqxmd.com/read/27978847/non-antibiotic-treatments-for-bacterial-diseases-in-an-era-of-progressive-antibiotic-resistance
#20
EDITORIAL
Steven M Opal
The emergence of multi-drug resistant (MDR) microbial pathogens threatens the very foundation upon which standard antibacterial chemotherapy is based. We must consider non-antibiotic solutions to manage invasive bacterial infections. Transition from antibiotics to non-traditional treatments poses real clinical challenges that will not be easy to solve. Antibiotics will continue to reliably treat some infections (e.g., group A streptococci and Treponema pallidum) but will likely need adjuvant therapies or will need to be replaced for many bacterial infections in the future...
December 16, 2016: Critical Care: the Official Journal of the Critical Care Forum
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