keyword
MENU ▼
Read by QxMD icon Read
search

Bacteria cary

keyword
https://www.readbyqxmd.com/read/29145870/bacillus-anthracis-gamma-phage-lysis-among-soil-bacteria-an-update-on-test-specificity
#1
Cari B Kolton, Nicole L Podnecky, Sean V Shadomy, Jay E Gee, Alex R Hoffmaster
BACKGROUND: Bacillus anthracis, which causes anthrax in humans and animals, is enzootic in parts of the U.S. state of Texas where cases are typically reported in animals annually. The gamma phage lysis assay is a common diagnostic method for identification of B. anthracis and is based on the bacterium's susceptibility to lysis. This test has been shown to be 97% specific for B. anthracis, as a small number of strains of other Bacillus spp. are known to be susceptible. In this study, we evaluated the performance of a combination of B...
November 16, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29143221/controlling-streptococcus-mutans-and-staphylococcus-aureus-biofilms-with-direct-current-and-chlorhexidine
#2
Hao Wang, Dacheng Ren
Microbial biofilms formed on biomaterials are major causes of chronic infections. Among them, Gram-positive bacteria Streptococcus mutans and Staphylococcus aureus are important pathogens causing infections associated with dental caries (tooth-decay) and other medical implants. Unfortunately, current antimicrobial approaches are ineffective in disrupting established biofilms and new methods are needed to improve the efficacy. In this study, we report that the biofilm cells of S. mutans and S. aureus can be effectively killed by low-level direct current (DC) and through synergy in concurrent treatment with DC and chlorhexidine (CHX) at low concentrations...
November 15, 2017: AMB Express
https://www.readbyqxmd.com/read/29140971/effect-of-s-mutans-and-s-sanguinis-on-growth-and-adhesion-of-p-gingivalis-and-their-ability-to-adhere-to-different-dental-materials
#3
Yan Tu, Xiaolong Ling, Yadong Chen, Yuan Wang, Na Zhou, Hui Chen
BACKGROUND Caries and periodontal diseases are caused by the biofilm formed by caries- and periodontal disease-related bacteria. Specific biofilms could be formed on different filling materials in oral cavity. Thus, to explore the inhibition effect of restorative filling materials on biofilm formation is of great significance in the treatment of caries and periodontal disease. MATERIAL AND METHODS The supernatants of S. mutans, S. sanguinis, and P. gingivalis suspension were combined with BHI broth. After 24 h, the live P...
November 15, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29125139/salivary-proteins-and-microbiota-as-biomarkers-for-early-childhood-caries-risk-assessment
#4
REVIEW
Abdullah S Hemadi, Ruijie Huang, Yuan Zhou, Jing Zou
Early childhood caries (ECC) is a term used to describe dental caries in children aged 6 years or younger. Oral streptococci, such as Streptococcus mutans and Streptococcus sorbrinus, are considered to be the main etiological agents of tooth decay in children. Other bacteria, such as Prevotella spp. and Lactobacillus spp., and fungus, that is, Candida albicans, are related to the development and progression of ECC. Biomolecules in saliva, mainly proteins, affect the survival of oral microorganisms by multiple innate defensive mechanisms, thus modulating the oral microflora...
November 10, 2017: International Journal of Oral Science
https://www.readbyqxmd.com/read/29120125/risk-factors-associated-with-black-tooth-stain
#5
Katica Prskalo, Eva Klarić Sever, Ivan Alerić, Tatjana Antonić Jelić, Ivona Žaja
The aim of the study was to show whether there is any influence of food, drink or drug intake on the formation of tooth discoloration. A total of 500 patients aged 15-25 years were examined to take part in the study. Of these, 60 patients were selected and divided into two groups of 30 patients each. Group 1 included patients with black pigmentation on vestibular/oral tooth surfaces. Group 2 included patients without discoloration (control). Data were recorded in a questionnaire. Atomic absorption spectrometry was used to determine elements in discoloration samples...
March 2017: Acta Clinica Croatica
https://www.readbyqxmd.com/read/29118256/survey-of-knowledge-beliefs-and-behaviors-of-migrant-vietnamese-parents-regarding-young-children-s-oral-health
#6
Uyen N Nguyen, Dorothy J Rowe, Judith C Barker
Purpose: The purpose of this study was to investigate the oral health knowledge, beliefs, and behaviors of migrant Vietnamese parents of 1-5 year-olds in San Jose, California.Method: A verbally-administered survey was conducted with a convenience sample of 45 Vietnamese parents recruited at San Jose public libraries. Following preliminary screening, written informed consent was obtained from eligible individuals. A pre-tested, structured 94-item questionnaire was used to collect information regarding parent demographics, and the parent's knowledge, beliefs, and behaviors about children's oral health...
April 2017: Journal of Dental Hygiene: JDH
https://www.readbyqxmd.com/read/29115611/d%C3%A2-tagatose-inhibits-the-growth-and-biofilm-formation-of-streptococcus%C3%A2-mutans
#7
Khaleque Hasibul, Haruyuki Nakayama-Imaohji, Masahito Hashimoto, Hisashi Yamasaki, Takaaki Ogawa, Junpei Waki, Ayano Tada, Saori Yoneda, Masaaki Tokuda, Minoru Miyake, Tomomi Kuwahara
Dental caries is an important global health concern and Streptococcus mutans has been established as a major cariogenic bacterial species. Reports indicate that a rare sugar, D‑tagatose, is not easily catabolized by pathogenic bacteria. In the present study, the inhibitory effects of D‑tagatose on the growth and biofilm formation of S. mutans GS‑5 were examined. Monitoring S. mutans growth over a 24 h period revealed that D‑tagatose prolonged the lag phase without interfering with the final cell yield...
November 8, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29104379/effect-of-dentin-disinfection-with-2-chlorhexidine-gluconate-and-0-3-iodine-on-dentin-bond-strength-an-in-vitro-study
#8
Nelamakanahalli K Suma, Kukkalli K Shashibhushan, V V Subba Reddy
Objective: Cavity preparation is a surgical procedure that attempts to remove all infected dentin.(1) Bacteria left beneath the filling material is greatest threat to the pulp. To reduce the potential for residual caries development and sensitivity, an antibacterial solution with the ability to disinfect the prepared tooth surface would be of help.(2) So this study was conducted to evaluate and compare the effect of dentin disinfection with 2% chlorhexidine gluconate (Consepsis) and 0...
July 2017: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29102025/lupinifolin-from-albizia-myriophylla-wood-a-study-on-its-antibacterial-mechanisms-against-cariogenic-streptococcus-mutans
#9
Surasak Limsuwan, Kotchakorn Moosigapong, Siriporn Jarukitsakul, Nantiya Joycharat, Sasitorn Chusri, Patcharawalai Jaisamut, Supayang Piyawan Voravuthikunchai
OBJECTIVE: To determine the anti-Streptococcus mutans mechanisms of action of lupinifolin from Albizia myriophylla Benth. (Fabaceae) wood and provide scientific evidence to support the traditional use of the plant against dental caries. METHODS: The minimum inhibitory concentration (MIC) was evaluated using the broth micro-dilution method. The effects of lupinifolin on bactericidal activity, bacterial cell walls, and membranes were investigated by time-kill, lysis, and leakage assays, respectively...
October 18, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29081915/osteopontin-adsorption-to-gram-positive-cells-reduces-adhesion-forces-and-attachment-to-surfaces-under-flow
#10
M F Kristensen, G Zeng, T R Neu, R L Meyer, V Baelum, S Schlafer
The bovine milk protein osteopontin (OPN) may be an efficient means to prevent bacterial adhesion to dental tissues and control biofilm formation. This study sought to determine to what extent OPN impacts adhesion forces and surface attachment of different bacterial strains involved in dental caries or medical device-related infections. It further investigated if OPN's effect on adhesion is caused by blocking the accessibility of glycoconjugates on bacterial surfaces. Bacterial adhesion was determined in a shear-controlled flow cell system in the presence of different concentrations of OPN, and interaction forces of single bacteria were quantified using single-cell force spectroscopy before and after OPN exposure...
2017: Journal of Oral Microbiology
https://www.readbyqxmd.com/read/29079629/plasticity-of-the-pyruvate-node-modulates-hydrogen-peroxide-production-and-acid-tolerance-in-multiple-oral-streptococci
#11
Xingqun Cheng, Sylvio Redanz, Nyssa Cullin, Xuedong Zhou, Xin Xu, Vrushali Joshi, Dipankar Koley, Justin Merritt, Jens Kreth
Commensal Streptococcus sanguinis and Streptococcus gordonii are pioneer oral biofilm colonizers. Characteristic for both is the SpxB-dependent production of H2O2, which is crucial for inhibiting competing biofilm members, especially the cariogenic species Streptococcus mutans H2O2 production is strongly impacted by environmental conditions, yet few mechanisms are known. Dental plaque pH is one of the key parameters dictating dental plaque ecology, and ultimately oral health status. Therefore, the objective of the current study was to characterize the effect of environmental pH upon H2O2 production by S...
October 27, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29059646/kocuria-rosea-kocuria-kristinae-leuconostoc-mesenteroides-as-caries-causing-representatives-of-oral-microflora
#12
Maiia M Ananieva, Mariia O Faustova, Iaroslav O Basarab, Galina A Loban'
INTRODUCTION: Recently, opportunistic microflora are increasingly known to be involved in the development of pathological processes in various systems and organs. This situation promotes interest in their detailed study as causative agents of bacterial infections. THE AIM: To study the microbial species residing in carious cavities in acute profound caries. MATERIALS AND METHODS: The study involved 14 people with a diagnosis of acute profound caries...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29050022/assessment-of-root-caries-lesion-activity-and-its-histopathological-features
#13
Thiago Saads Carvalho, Adrian Lussi
Despite certain similarities in the etiology of root caries (RC) and coronal caries, there are notable differences in their histology, namely with regard to the demineralization process, which should be taken into consideration when assessing lesion activity. In this chapter, we present the histological changes to the dentin and pulp, occurring physiologically or in response to caries lesions. We focus on the histological features specific to RC lesions, discussing the assessment of lesion activity. The physiological changes occurring to the dentin and pulp are the formation of secondary dentin and the sclerosis of dentin tubules, while tertiary dentin is formed during pathologic stimuli from caries lesions...
2017: Monographs in Oral Science
https://www.readbyqxmd.com/read/29050019/endogenous-enzymes-in-root-caries
#14
Tchilalo Boukpessi, Suzanne Menashi, Catherine Chaussain
Similar to coronal caries, root caries results from a disequilibrium of the de-remineralization balance in favor of the demineralization process. It mainly involves a bacterial shift in favor of an increase in the proportion of acidogenic and aciduric bacteria. This process permanently damages the dental mineralized tissues, namely the dental cementum and dentin. In addition to the demineralization and exposure of the dentin or the cementum organic matrix, acid production by cariogenic bacteria induces the activation of endogenous (host-derived) enzymes within the dentin and saliva...
2017: Monographs in Oral Science
https://www.readbyqxmd.com/read/29050018/root-surface-biofilms-and-caries
#15
Thuy Do, Nailê Damé-Teixeira, Monika Naginyte, Philip D Marsh
Following gingival recession, which increases with age, the root surface becomes exposed, creating new environments for microbial colonization and biofilm formation. The formation of root surface biofilms is influenced by the availability and composition of saliva and gingival crevicular fluid; they provide components for the conditioning film (acquired root surface pellicle) and also act as a source of nutrients. The early bacterial colonizers of the root surface are similar to those found on the enamel, and Gram-positive species such as Streptococcus sanguinis, S...
2017: Monographs in Oral Science
https://www.readbyqxmd.com/read/29048784/-tracking-casein-phosphopeptides-during-fermentation-by-high-performance-liquid-chromatography-tandem-mass-spectrometry
#16
Hao Dong, Yang Yu, Jiaze Yan, Yan Jin
Casein phosphopeptides (CPPs) are phosphorylated fragments of casein, which have a variety of biological functions such as promotion of mineral absorption, antioxidation and prevention of dental caries. This study investigated CPPs in milk and yogurt fermented by Lb. bulgaricus (Lactobacillus debrueckii subsp. bulgaricus) and S. thermophilus (Streptococcus thermophilus) with high performance liquid chromatography-tandem mass spectrometry. The results showed that milk contained endogenous CPPs, which were mainly derived from high abundance of caseins αs1-CN and β-CN, in the role of endogenous protease...
June 8, 2017: Se Pu, Chinese Journal of Chromatography
https://www.readbyqxmd.com/read/29032514/surface-roughness-and-bacterial-adhesion-on-root-dentin-treated-with-diode-laser-and-conventional-desensitizing-agents
#17
Maiza S Cury, Camilla B Silva, Ruchele D Nogueira, Michelle G D Campos, Regina G Palma-Dibb, Vinicius R Geraldo-Martins
The treatments for dentin hypersensitivity (DH) may change the surface roughness of the root dentin, which can lead to biofilm accumulation, increasing the risk of root caries. The aim was to compare the surface roughness of root dentin after different treatments of DH and the biofilm formation on those surfaces. After initial surface roughness (Sa) assessment, 50 bovine root fragments received the following treatments (n = 10): G 1-no treatment; G2-5% sodium fluoride varnish; G3-professional application of a desensitizing dentifrice; G4-toothbrushing with a desensitizing dentifrice; and G5-diode laser application (908 nm; 1...
October 14, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29028629/a-dual-energy-micro-ct-methodology-for-visualization-and-quantification-of-biofilm-formation-and-dentin-demineralization
#18
Paula Maciel Pires, Thais Pires Dos Santos, Andrea Fonseca-Gonçalves, Matheus Melo Pithon, Ricardo Tadeu Lopes, Aline de Almeida Neves
OBJECTIVE: The aim of this study was to induce artificial caries in human sound dentin by means of a microcosm model using human saliva as source of bacteria and to apply a novel dual-energy micro-CT technique to quantify biofilm formation and evaluate its demineralization potential. DESIGN: Eight sound third molars had the occlusal enamel removed by cutting with a diamond disk and five cylindrical cavities (±2mm diameter; ±1.5mm depth) were prepared over the dentin surface in each specimen (n=40 cavities)...
October 7, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29023506/exopolysaccharides-regulate-calcium-flow-in-cariogenic-biofilms
#19
Monika Astasov-Frauenhoffer, Muth M Varenganayil, Alan W Decho, Tuomas Waltimo, Olivier Braissant
Caries-associated biofilms induce loss of calcium from tooth surfaces in the presence of dietary carbohydrates. Exopolysaccharides (EPS) provide a matrix scaffold and an abundance of primary binding sites within biofilms. The role of EPS in binding calcium in cariogenic biofilms is only partially understood. Thus, the aim of the present study is to investigate the relationship between the calcium dissolution rates and calcium tolerance of caries-associated bacteria and yeast as well as to examine the properties of EPS to quantify its binding affinity for dissolved calcium...
2017: PloS One
https://www.readbyqxmd.com/read/29016613/quantification-of-carious-pathogens-in-the-interdental-microbiota-of-young-caries-free-adults
#20
Denis Bourgeois, Alexandra David, Camille Inquimbert, Paul Tramini, Nicolas Molinari, Florence Carrouel
BACKGROUND: The majority of caries lesions in adults occur on the proximal tooth surfaces of the posterior teeth. A comprehensive study of the composition of the oral microbiota is fundamental for a better understanding of the etiology of interdental caries. METHODS: Twenty-five caries-free subjects (20-35 years old) were enrolled in the study. The interdental biofilm of four interdental sites were collected. The real-time polymerase chain reaction (PCR) methodology were used to quantify (i) the following bacteria: Streptococcus spp...
2017: PloS One
keyword
keyword
78957
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"