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Streptococcus mutans

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https://www.readbyqxmd.com/read/29768525/effects-of-a-food-enriched-with-probiotics-on-streptococcus-mutans-and-lactobacillus-spp-salivary-counts-in-preschool-children-a-cluster-randomized-trial
#1
Judy Villavicencio, Lina Maria Villegas, Maria Cristina Arango, Susana Arias, Francia Triana
Probiotics have provided benefits to general health, but they are still insufficient to dental health. This study aimed to evaluate milk supplemented with probiotic bacteria and standard milk, measured by levels of Streptococcus mutans (S. mutans) and Lactobacillus spp., in 3-4-year-old children after 9 months of intervention. The study was a triple-blind, placebo-controlled, randomized trial. The sample was composed of 363 preschoolers attending five child development centers in Cali, Colombia. They were randomized to two groups: children in the intervention group drank 200 mL of milk with Lactobacillus rhamnosus 5x106 and Bifidobacteruim longum 3x106, and children in the control group drank 200 mL of standard milk...
May 14, 2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29768437/oral-health-status-in-historic-population-macroscopic-and-metagenomic-evidence
#2
Claire Willmann, Xavier Mata, Kristian Hanghoej, Laure Tonasso, Lenka Tisseyre, Céline Jeziorski, Elodie Cabot, Pierre Chevet, Eric Crubézy, Ludovic Orlando, Rémi Esclassan, Catherine Thèves
Recent developments in High-Throughput DNA sequencing (HTS) technologies and ancient DNA (aDNA) research have opened access to the characterization of the microbial communities within past populations. Most studies have, however, relied on the analysis of dental calculus as one particular material type particularly prone to the molecular preservation of ancient microbial biofilms and potential of entire teeth for microbial characterization, both of healthy communities and pathogens in ancient individuals, remains overlooked...
2018: PloS One
https://www.readbyqxmd.com/read/29765815/in-vitro-investigation-of-antimicrobial-activities-of-ethnomedicinal-plants-against-dental-caries-pathogens
#3
Mamta Besra, Vipin Kumar
The study aimed to evaluate the antimicrobial activity of medicinal plant extracts against the bacterial pathogens prominent in dental caries. A total of 20 plant species (herbs, shrubs and trees) belonging to 18 genera and 15 families were documented for dental caries. Antimicrobial activity of solvent extracts and essential oil from plants were determined by zone of inhibition on the growth of Streptococcus mutans (MTCC 497) and Lactobacillus acidophilus (MTCC 10307) using the agar well diffusion method. The results of in vitro antimicrobial assay prove that methanol is more successful in the extraction of phytochemicals from plant samples than aqueous solvent, as methanol extracts show higher antimicrobial activity than aqueous extracts against both the test pathogens...
May 2018: 3 Biotech
https://www.readbyqxmd.com/read/29763739/antimicrobial-effect-of-the-photodynamic-therapy-using-erythrosine-methylene-blue-combination-on-streptococcus-mutans-biofilm
#4
Laíse Midori Tokubo, Pedro Luiz Rosalen, Janaina de Cássia Orlandi Sardi, Irlan Almeida Freires, Mitsue Fujimaki, Josely Emiko Umeda, Patricia Magalhães Barbosa, Gabriela Ortolan Tecchio, Noboru Hioka, Camila Fabiano de Freitas, Raquel Sano Suga Terada
BACKGROUND: Photodynamic therapy (PDT) has demonstrated promising results in the treatment of several clinical pathologies through the photochemical reaction caused by the combination of a photosensitizer and a light source. The objective of this study was to evaluate the antimicrobial effect of the combination of the photosensitizers (PSs) erythrosine/methylene blue activated by a white halogen light device on Streptococcus mutans biofilm. METHODS: Two separate experiments were conducted, the first using the PSs at the concentration of 100 μM, and the second 250 μM...
May 12, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29756653/the-effect-of-photodynamic-therapy-on-pathogenic-bacteria-around-peri-implant-sulcus-and-in-the-cavity-between-abutment-and-implant-after-healing-phase-a-prospective-clinical-study
#5
Lin-Yi Zhou, Jun-Yu Shi, Yu Zhu, Shu-Jiao Qian, Hong-Chang Lai, Ying-Xin Gu
OBJECTIVES: To compare levels of pathogens from peri-implant sulcus versus abutment screw cavities after photodynamic therapy. MATERIAL AND METHODS: Twenty patients were included. Photodynamic therapy (PDT) was applied both in sulcus and cavities after sampling following suprastructures loading, and repeated after 2 weeks. Two samples each containing four paper points were collected for each implant at baseline, 2 weeks, 3 months: (i) peri-implant sulcus and (ii) abutment screw cavities...
May 14, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29755627/molecular-diagnosis-of-bacterial-definite-infective-endocarditis-by-real-time-polymerase-chain-reaction
#6
Reza Faraji, Mostafa Behjati-Ardakani, Nooshin Faraji, Seyed Mohammad Moshtaghioun, Seyed Mehdi Kalantar, Ali Pedarzadeh, Hengameh Zandi, Mohammadtaghi Sarebanhassanabadi, Nastaran Ahmadi, Ali Dehghani Firoozabadi
Infective endocarditis (IE) can be diagnosed using the Duke criteria, which cannot be conclusive especially when the results of blood cultures are negative. This study aimed at using real-time polymerase chain reaction (PCR) technique to isolate bacteria present in whole blood samples of patients with definitive IE on the basis of the method designed in this study. This laboratory and test study was conducted on 20 whole blood samples taken from patients with definitive IE. Real-time PCR of the 16s rRNA was utilized to directly analyze whole blood samples to diagnose bacterial IE...
April 2018: Cardiology Research
https://www.readbyqxmd.com/read/29752268/preferred-hexoses-influence-long-term-memory-and-induction-of-lactose-catabolism-by-streptococcus-mutans
#7
Lin Zeng, Lulu Chen, Robert A Burne
Bacteria prioritize sugar metabolism via carbohydrate catabolite repression, which regulates global gene expression to optimize the catabolism of preferred substrates. Here, we report an unusual long-term memory effect in certain Streptococcus mutans strains that alters adaptation to growth on lactose after prior exposure to glucose or fructose. In strain GS-5, cells that were first cultured on fructose then transferred to lactose displayed an exceptionally long lag (>11 h) and slower growth, compared to cells first cultured on glucose or cellobiose, which displayed a reduction in lag phase by as much as 10 h...
May 11, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29750090/antibacterial-potency-and-fluoride-release-of-a-glass-ionomer-restorative-material-containing-different-concentrations-of-natural-and-chemical-products-an-in-vitro-comparative-study
#8
Hanaa Elgamily, Omaima Ghallab, Hoda El-Sayed, Maha Nasr
Background: This study investigated the antibacterial efficacy against Streptococcus mutans and fluoride release of a conventional glass ionomer (GI) contained natural and chemical agents. Material and Methods: Two hundred and ten GI specimens were divided into ten groups (n=21) according to the concentrations of the additives as; Propolis extract containing GI (Groups 1, 2, 3) with concentrations of 0.25%, 0.75% and 1.25% respectively, Miswak extract containing GI (Groups 4, 5, 6) and Chlorhexidine containing GI (Groups 7, 8, 9) with the same concentrations...
April 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29749033/potential-risk-factors-for-dental-caries-in-type-2-diabetic-patients
#9
M A Almusawi, I Gosadi, R Abidia, M Almasawi, H A Khan
BACKGROUND: Diabetic patients are known to be at higher risk for dental caries. However, the role of potential risk factors such as blood glucose, salivary glucose and glycaemic control in the occurrence of dental caries in type 2 diabetes (T2D) is not clearly understood so far, and therefore, it was evaluated in this study. MATERIALS AND METHODS: This cross-sectional study was conducted on 100 T2D patients from Saudi Arabia. The caries risk assessment was evaluated using the guidelines of Caries Management by Risk Assessment (CAMBRA)...
May 11, 2018: International Journal of Dental Hygiene
https://www.readbyqxmd.com/read/29744324/effect-of-short-term-consumption-of-amul-probiotic-yogurt-containing-lactobacillus-acidophilus-la5-and-bifidobacterium-lactis-bb12-on-salivary-streptococcus-mutans-count-in-high-caries-risk-individuals
#10
Harshal Prakash Bafna, C G Ajithkrishnan, Thanveer Kalantharakath, Ricky Pal Singh, Pulkit Kalyan, Jagadishchandra Bheemasain Vathar, Hemal R Patel
Aim: This study aims to study the effect of short-term consumption of probiotic yogurt containing Lactobacillus acidophilus La5 and Bifidobacterium lactis Bb12 on salivary Streptococcus mutans count in high caries risk individuals. Materials and Methods: A double-blind randomized control trial was conducted, and 70 high caries risk individuals with a salivary S. mutans count of more than 106 CFU/ml of saliva were followed for 4 weeks. Participants ingested 100 g yogurt containing L...
April 2018: International Journal of Applied and Basic Medical Research
https://www.readbyqxmd.com/read/29744214/comparison-of-biofilm-formation-and-migration-of-streptococcus-mutans-on-tooth-roots-and-titanium-miniscrews
#11
Kittipong Laosuwan, Don Jeevanie Epasinghe, Zhaoming Wu, Wai Keung Leung, David William Green, Han Sung Jung
Periodontitis and peri-implantitis are inflammatory diseases caused by periodontal pathogenic bacteria leading to destruction of supporting periodontal/peri-implant tissue. However, the progression of inflammatory process of these two diseases is different. The bacterial biofilm is the source of bacteria during the inflammatory process. As the bacteria migrate down the surface of tooth or titanium implant, the inflammation spreads along with it. Streptococcus mutans has an important role in oral bacterial biofilm formation in early stage biofilm before the microbiota shift to late stage and become more virulent...
April 2018: Clinical and Experimental Dental Research
https://www.readbyqxmd.com/read/29744207/salivary-intercellular-adenosine-triphosphate-testing-in-primary-caretakers-an-examination-of-statistical-significance-versus-diagnostic-predictability
#12
Crystal Bill, Judy A Danielson, Robert S Jones
A primary caretaker is a potential reservoir of bacteria for an infant child and can be evaluated during a child's caries risk assessment. The aim of this study was to investigate an indirect method for assessing Streptococcus mutans and Streptococcus sobrinus (MS) and lactobacillus (LB) levels in a caretaker's saliva. Thirty-eight primary caretakers participated in the study to determine whether a 2-step method to assess the intracellular adenosine triphosphate (ATP) levels in saliva (saliva i-ATP method) predicted higher MS and LB levels...
December 2017: Clinical and Experimental Dental Research
https://www.readbyqxmd.com/read/29742263/doxycycline-containing-glass-ionomer-cement-for-arresting-residual-caries-an-in-vitro-study-and-a-pilot-trial
#13
Aline Rogéria Freire de Castilho, Cristiane Duque, Paula Fernanda Kreling, Jesse Augusto Pereira, Andreia Bolzan de Paula, Mario Alexandre Coelho Sinhoreti, Regina Maria Puppin-Rontani
In a previous study, we demonstrated that the incorporation of doxycycline hyclate (DOX) into resin-modified glass ionomer cement (RMGIC) inhibited important cariogenic microorganisms, without modifying its biological and mechanical characteristics. In this study, we keep focused on the effect of that experimental material as a potential therapy for arresting residual caries by analyzing other in vitro properties and conducting a pilot clinical trial assessing the in vivo effect of DOX-containing RMGIC on residual mutans streptococci after partial carious removal in primary molars...
2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29739390/a-terpenoid-isolated-from-sarang-semut-myrmecodia-pendans-bulb-and-its-potential-for-the-inhibition-and-eradication-of-streptococcus-mutans-biofilm
#14
Meirina Gartika, Hening T Pramesti, Dikdik Kurnia, Mieke H Satari
BACKGROUND: Dental caries remains a serious problem due to its detrimental effects on individual health and quality of life. The bulbs of Myrmecodia pendans (Merr & Perry), native plants of Papua, have been used as natural remedies for tumours, gout, diarrhoea, and fever. In this study, one of the active compounds of M. pendans was isolated, and its biological activity against the formation of Streptococcus mutans ATCC 25175 biofilm was tested. METHODS: M. pendans was extracted with ethyl acetate using a Soxhlet apparatus...
May 9, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29735764/autoregulation-of-the-s-mutans-slor-metalloregulator-is-constitutive-and-driven-by-an-independent-promoter
#15
Patrick Monette, Richard Brach, Annie Cowan, Roger Winters, Jazz Weisman, Foster Seybert, Kelsey Goguen, James Chen, Arthur Glasfeld, Grace Spatafora
Streptococcus mutans , one of ∼600 bacterial species in the human oral cavity, is among the most acidogenic constituents of the plaque biofilm. Considered to be the primary causative agent of dental caries, S. mutans harbors a 25kDa SloR metalloregulatory protein which controls metal ion transport across the bacterial cell membrane to maintain essential metal ion homeostasis. The expression of SloR derives, in part, from transcriptional readthrough of the sloABC operon which encodes a Mn2+ /Fe2+ ABC transport system...
May 7, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29735760/disruption-of-a-novel-iron-transport-system-reverses-oxidative-stress-phenotypes-of-a-dpr-mutant-strain-of-streptococcus-mutans
#16
Tridib Ganguly, Jessica K Kajfasz, James H Miller, Eric Rabinowitz, Lívia C C Galvão, Pedro L Rosalen, Jacqueline Abranches, José A Lemos
The Dps-like peroxide resistance protein (Dpr) is essential for H2 O2 stress tolerance and aerobic growth of the oral pathogen Streptococcus mutans Dpr accumulates during oxidative stress, protecting the cell by sequestering iron ions, thereby preventing the generation of toxic hydroxyl radicals that result from the interaction of iron with H2 O2 Previously, we reported that the SpxA1 and SpxA2 regulators positively regulate expression of dpr in S. mutans Using an antibody raised against S. mutans Dpr, we confirmed at the protein level the central and cooperative nature of SpxA1 and SpxA2 regulation in Dpr production...
May 7, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29731575/oral-carriage-of-cariogenic-bacteria-and-candida-albicans-in-asthmatic-adults-before-and-after-anti-asthma-medication-a-longitudinal-study
#17
R B Ashuja, D B Nandini, B Vidyasagar, R Ashwini, Mandana Donoghue, G S Madhushankari
Background: Antiasthmatic medications such as β2 agonists and corticosteroids have shown potential side effects such as increased caries risk and oral candidiasis. Studies evaluating microbial changes in adult asthmatics are very scanty in the literature. The present study aimed to evaluate the effects of asthma and its medication on cariogenic bacteria and Candida albicans in adult asthmatics. Aim and Objectives: Our aim was to evaluate and compare counts of Streptococcus mutans (SM) and lactobacilli in plaque and C...
January 2018: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/29728545/antibacterial-effect-and-tensile-bond-strength-of-self-etching-adhesive-resins-with-and-without-methacryloyloxydodecylpyridinium-bromide-an-in-vitro-study
#18
Madhuram Krishnamurthy, V Naveen Kumar, Ashok Leburu, Chakravarthy Dhanavel, Kasiswamy E Selvendran, Nehrudhas Praveen
Aim: The aim of the present study was to compare the antibacterial activity of a self-etching primer containing antibacterial monomer methacryloyloxydodecylpyridinium bromide (MDPB) (Clearfil protect bond) with a conventional self-etching primer without MDPB (Clearfil SE bond) against Streptococcus mutans and the effect of incorporation of MDPB on the tensile bond strength of the experimental self-etching primer (Clearfil protect bond). Materials and methods: The antibacterial activity of the self-etching primers was assessed using agar disk diffusion method and the diameters of the zones of inhibition were measured and ranked...
April 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29724549/the-antibacterial-cytotoxic-and-flexural-properties-of-a-composite-resin-containing-a-quaternary-ammonium-monomer
#19
Qiting Huang, Shuheng Huang, Xiaoxu Liang, Wei Qin, Fang Liu, Zhengmei Lin, Jingwei He
STATEMENT OF PROBLEM: The use of composite resin to restore teeth has increased substantially during the last decades. However, secondary caries and the fracture of restorations are the leading reasons for clinical restoration failure. Mechanically strong composite resins with caries-inhibition capabilities are needed. Although antibacterial dimethacrylate quaternary ammonium monomers have been synthesized, composite resin containing dimethacrylate quaternary ammonium monomers and glass fillers has rarely been reported...
April 30, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29719422/antimicrobial-action-of-chlorhexidine-digluconate-in-self-ligating-and-conventional-metal-brackets-infected-with-streptococcus-mutans-biofilm
#20
Ana Paula Dias, Marco Aurélio Benini Paschoal, Rafael Soares Diniz, Lucas Meneses Lage, Letícia Machado Gonçalves
Objectives: The objectives of this study were to assess the adherence of Streptococcus mutans biofilms grown over conventional ligature (CL) or self-ligating (SL) metal brackets and their bacterial viability after 0.12% chlorhexidine (CHX) digluconate treatment. Materials and methods: The sample consisted of 48 metallic orthodontic brackets divided randomly into two groups: CL (n=24) and SL brackets (n=24). S. mutans biofilms were grown over the bracket surface (96 h) and treated with CHX (positive control) or 0...
2018: Clinical, Cosmetic and Investigational Dentistry
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