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https://www.readbyqxmd.com/read/27924595/quantitative-analysis-of-periodontal-pathogens-using-real-time-polymerase-chain-reaction-pcr
#1
Mª José Marin, Elena Figuero, David Herrera, Mariano Sanz
The quantitative polymerase chain reaction (qPCR) is a variant of PCR aimed to detect and quantify a targeted DNA molecule through the addition of probes labeled with fluorescent molecules that emit fluorescence within each amplification cycle, what results in fluorescence values proportional to the amount of accumulated PCR product. This chapter presents the detailed procedures for quantification of different periodontal pathogens (Porphyromonas gingivalis, Aggregatibacter actinomycetemcomitans, Tannerella forsythia, Campylobacter rectus, and Fusobacterium spp...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27909688/the-danger-signal-extracellular-atp-is-an-inducer-of-fusobacterium-nucleatum-biofilm-dispersal
#2
Qinfeng Ding, Kai Soo Tan
Plaque biofilm is the primary etiological agent of periodontal disease. Biofilm formation progresses through multiple developmental stages beginning with bacterial attachment to a surface, followed by development of microcolonies and finally detachment and dispersal from a mature biofilm as free planktonic bacteria. Tissue damage arising from inflammatory response to biofilm is one of the hallmark features of periodontal disease. A consequence of tissue damage is the release of ATP from within the cell into the extracellular space...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/27899684/high-risk-periodontal-pathogens-contribute-to-the-pathogenesis-of-atherosclerosis
#3
REVIEW
Bradley Field Bale, Amy Lynn Doneen, David John Vigerust
Periodontal disease (PD) is generated by microorganisms. These microbes can enter the general circulation causing a bacteraemia. The result can be adverse systemic effects, which could promote conditions such as cardiovascular disease. Level A evidence supports that PD is independently associated with arterial disease. PD is a common chronic condition affecting the majority of Americans 30 years of age and older. Atherosclerosis remains the largest cause of death and disability. Studies indicate that the adverse cardiovascular effects from PD are due to a few putative or high-risk bacteria: Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola or Fusobacterium nucleatum There are three accepted essential elements in the pathogenesis of atherosclerosis: lipoprotein serum concentration, endothelial permeability and binding of lipoproteins in the arterial intima...
November 29, 2016: Postgraduate Medical Journal
https://www.readbyqxmd.com/read/27898560/fusobacterium-nucleatum-an-unusual-cause-of-subdural-empyema
#4
Denise Yocum
This article describes an uncommon presentation of a subdural empyema in a young man. Because the patient's initial presentation consisted of nonspecific abdominal complaints, subdural empyema was not initially considered. However, a thorough medical history, including recent travel history, and appropriate multidisciplinary consultation, were key to reaching the correct diagnosis.
December 2016: JAAPA: Official Journal of the American Academy of Physician Assistants
https://www.readbyqxmd.com/read/27898021/salivary-microbiome-diversity-in-caries-free-and-caries-affected-children
#5
Shan Jiang, Xiaoli Gao, Lijian Jin, Edward C M Lo
Dental caries (tooth decay) is an infectious disease. Its etiology is not fully understood from the microbiological perspective. This study characterizes the diversity of microbial flora in the saliva of children with and without dental caries. Children (3-4 years old) with caries (n = 20) and without caries (n = 20) were recruited. Unstimulated saliva (2 mL) was collected from each child and the total microbial genomic DNA was extracted. DNA amplicons of the V3-V4 hypervariable region of the bacterial 16S rRNA gene were generated and subjected to Illumina Miseq sequencing...
November 25, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27895859/dysbiosis-of-fecal-microbiota-and-high-frequency-of-citrobacter-klebsiella-spp-and-actinomycetes-in-patients-with-irritable-bowel-syndrome-and-gastroenteritis
#6
Leila Ganji, Masoud Alebouyeh, Mohammad Hassan Shirazi, Seyed Saeed Eshraghi, Abbas Mirshafiey, Naser Ebrahimi Daryani, Mohammad Reza Zali
AIM: This study was aimed to characterize putative differences of fecal microbiota between irritable bowel syndrome (IBS) and gastroenteritis patients and healthy controls. BACKGROUND: New evidence proposed that gut microbiota has a deep effect on the balance between health and disease. PATIENTS AND METHODS: The presence of Clostridium difficile, Campylobacter spp., Enterobacteriacea and Staphylococci were detected in the samples using selective and specific culture media...
2016: Gastroenterology and Hepatology From Bed to Bench
https://www.readbyqxmd.com/read/27894820/quantitative-detection-of-periodontopathic-bacteria-in-lower-respiratory-tract-specimens-by-real-time-pcr
#7
Kentaro Nagaoka, Katsunori Yanagihara, Yosuke Harada, Koichi Yamada, Yohei Migiyama, Yoshitomo Morinaga, Koichi Izumikawa, Shigeru Kohno
The presence of common periodontopathic bacteria, the Fusobacterium nucleatum-periodonticum-simiae group, Prevotella intermedia, and Porphyromonas gingivalis was determined from respiratory tract specimens of bacterial pneumonia by real-time PCR using universal and species-specific TaqMan probe/primer sets. 42 patients with infectious pneumonia and 45 patients without infectious pneumonia were retrospectively enrolled in clinical studies. Periodontopathic bacterial DNA was found in 57.1% cases of infectious pneumonia and 31...
November 26, 2016: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/27890724/clinical-characteristics-and-antimicrobial-susceptibilities-of-anaerobic-bacteremia-in-an-acute-care-hospital
#8
Thean Yen Tan, Lily Siew Yong Ng, Lee Ling Kwang, Suma Rao, Li Ching Eng
: This study investigated the clinical features of anaerobic bacteraemia in an acute-care hospital, and evaluated the antimicrobial susceptibility of these isolates to commonly available antibiotics. MATERIALS & METHODS: Microbiological and epidemiological data from 2009-2011were extracted from the laboratory information system and electronic medical records. One hundred and eleven unique patient episodes consisting of 116 anaerobic isolates were selected for clinical review and antibiotic susceptibility testing...
November 24, 2016: Anaerobe
https://www.readbyqxmd.com/read/27890003/biofilm-mediated-antibiotic-resistant-oral-bacterial
#9
Indu Lata Kanwar, Abhishek Kumar Sah, Preeti K Suresh
Oral diseases like dental caries and periodontal disease are directly associated with the capability of bacteria to form biofilm. Periodontal diseases have been associated to anaerobic Gram-negative bacteria forming a subgingival plaque (Porphyromonas gingivalis, Actinobacillus, Prevotella and Fusobacterium). Biofilm is a complex bacterial community that is highly resistant to antibiotics and human immunity. Biofilm communities are the causative agents of biological developments such as dental caries, periodontitis, and peri-implantitis, and causing periodontal tissue breakdown...
November 24, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27885964/porphyromonas-gingivalis-capsule-mediated-coaggregation-as-a-virulence-factor-in-mixed-infection-with-fusobacterium-nucleatum
#10
David Polak, Oren Ferdman, Yael Houri-Haddad
BACKGROUND: Porphyromonas gingivalis capsule enables evasion from phagocytosis, invasion of keratinocytes and bacterial survival. In mixed infection, the capsule also participates in coaggregation, which may lead to characteristic virulence not present in the mono-infection. The aim of the study was to evaluate the role of P.gingivalis capsule as a virulence factor in co-aggregated mixed infection with Fusobacterium nucleatum. METHODS: Mixed infections containing F...
November 25, 2016: Journal of Periodontology
https://www.readbyqxmd.com/read/27879060/evidence-of-microbiota-dysbiosis-in-chronic-rhinosinusitis
#11
Michael Hoggard, Kristi Biswas, Melissa Zoing, Brett Wagner Mackenzie, Michael W Taylor, Richard G Douglas
BACKGROUND: Despite considerable research, the pathogenesis of chronic rhinosinusitis (CRS) remains poorly understood. Potential microbial roles in the etiology or progression of CRS have long been hypothesized, yet few specific associations have been identified. In this study we investigate associations between patterns in resident bacterial communities and clinical variants of CRS. METHODS: Bacterial communities were assessed in 94 patients with extensive bilateral CRS undergoing endoscopic sinus surgery (ESS) and 29 controls undergoing ESS for indications other than CRS...
November 23, 2016: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/27876571/fusobacterium-nucleatum-increases-proliferation-of-colorectal-cancer-cells-and-tumor-development-in-mice-by-activating-tlr4-signaling-to-nf%C3%AE%C2%BAb-upregulating-expression-of-microrna-21
#12
Yongzhi Yang, Wenhao Weng, Junjie Peng, Leiming Hong, Lei Yang, Yuji Toiyama, Renyuan Gao, Minfeng Liu, Mingming Yin, Cheng Pan, Hao Li, Bomin Guo, Qingchao Zhu, Qing Wei, Mary-Pat Moyer, Ping Wang, Sanjun Cai, Ajay Goel, Huanlong Qin, Yanlei Ma
BACKGROUND & AIMS: Nearly 20% of the global cancer burden can be linked to infectious agents. Fusobacterium nucleatum promotes tumor formation by epithelial cells via unclear mechanisms. We aimed to identify microRNAs (miRNAs) induced by F nucleatum and evaluate their ability to promote colorectal carcinogenesis in mice. METHODS: Colorectal cancer (CRC) cell lines were incubated with F nucleatum or control reagents and analyzed in proliferation and would healing assays...
November 19, 2016: Gastroenterology
https://www.readbyqxmd.com/read/27859260/inducible-expression-of-a-disintegrin-and-metalloproteinase-8-in-chronic-periodontitis-and-gingival-epithelial-cells
#13
W P P Aung, P Chotjumlong, S Pata, P Montreekachon, C Supanchart, S Khongkhunthian, T Sastraruji, S Krisanaprakornkit
BACKGROUND AND OBJECTIVES: The expression of A Disintegrin and Metalloproteinase 8 (ADAM8) is associated with several inflammatory diseases. Elevated ADAM8 levels have been shown in gingival crevicular fluid of patients with chronic periodontitis. The objective of this study was to investigate ADAM8 expression in chronic periodontitis tissues compared with that in normal tissues. ADAM8 expression and its inductive mechanism were examined in human gingival epithelial cells (HGECs) and human gingival fibroblasts...
November 17, 2016: Journal of Periodontal Research
https://www.readbyqxmd.com/read/27851426/1791-an-unusual-case-of-fusobacterium-necrophorum-brain-abscess-misdiagnosed-as-viral-meningitis
#14
Sarah Beshay, Saivaralaxmi Munaganti, Aditya Uppalapati
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27851423/1788-a-rare-case-of-fusobacterium-necrophorum-bacteremia-in-the-setting-of-quinsy
#15
Siddharth Shah, Kalpesh Shah, Rajeev Yalamanchili
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27851409/1774-fusobacterium-necrophum-without-septic-thrombophlebitis
#16
Camille Halfman, Jeremy Joslin
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27851408/1773-a-review-of-a-rare-case-of-necrotizing-pneumonia-and-septicemia-caused-by-fusobacterium-mortiferum
#17
Aashrai Sai Venkat Gudlavalleti, Siddharth Shah, Amit Sharma, Elizabeth Asiago-Reddy
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27851394/1759-cavernous-sinus-thrombosis-and-meckel-diverticular-bleed-associated-with-fusobacterium-bacteremia
#18
Natalya Azadeh, John Wilson, Lioudmila Karnatovskaia
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27846243/bacterially-associated-transcriptional-remodelling-in-a-distinct-genomic-subtype-of-colorectal-cancer-provides-a-plausible-molecular-basis-for-disease-development
#19
Katie S Lennard, Ryan W Goosen, Jonathan M Blackburn
The relevance of specific microbial colonisation to colorectal cancer (CRC) disease pathogenesis is increasingly recognised, but our understanding of possible underlying molecular mechanisms that may link colonisation to disease in vivo remains limited. Here, we investigate the relationships between the most commonly studied CRC-associated bacteria (Enterotoxigenic Bacteroides fragilis, pks+ Escherichia coli, Fusobacterium spp., afaC+ E. coli, Enterococcus faecalis & Enteropathogenic E. coli) and altered transcriptomic and methylation profiles of CRC patients, in order to gain insight into the potential contribution of these bacteria in the aetiopathogenesis of CRC...
2016: PloS One
https://www.readbyqxmd.com/read/27834171/bacterial-communities-associated-with-apical-periodontitis-and-dental-implant-failure
#20
Simon Dingsdag, Stephen Nelson, Nicholas V Coleman
BACKGROUND: Previously, we demonstrated that bacteria reside in apparently healed alveolar bone, using culture and Sanger sequencing techniques. Bacteria in apparently healed alveolar bone may have a role in peri-implantitis and dental implant failure. OBJECTIVE: To compare bacterial communities associated with apical periodontitis, those colonising a failed implant and alveolar bone with reference biofilm samples from healthy teeth. METHODS AND RESULTS: The study consisted of 196 samples collected from 40 patients undergoing routine dental implant insertion or rehabilitation...
2016: Microbial Ecology in Health and Disease
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