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https://www.readbyqxmd.com/read/28065676/rhamnolipids-from-non-pathogenic-burkholderia-thailandensis-e264-physicochemical-characterization-antimicrobial-and-antibiofilm-efficacy-against-oral-hygiene-related-pathogens
#1
Mohamed Elshikh, Scott Funston, Alif Chebbi, Syed Ahmed, Roger Marchant, Ibrahim M Banat
Biosurfactants are naturally occurring surface active compounds that have mainly been exploited for environmental applications and consumer products, with their biomedical efficacy an emerging area of research. Rhamnolipids area major group of biosurfactants that have been reported for their antimicrobial and antibiofilm efficacy. One of the main limiting factors for scaled up production and downstream applications of rhamnolipids is the fact that they are predominantly produced from the opportunistic pathogen Pseudomonas aeruginosa...
January 5, 2017: New Biotechnology
https://www.readbyqxmd.com/read/28061510/bacterial-coaggregation-among-the-most-commonly-isolated-bacteria-from-contact-lens-cases
#2
Ananya Datta, Fiona Stapleton, Mark D P Willcox
Purpose: To examine the coaggregation and cohesion between the commonly isolated bacteria from contact lens cases. Methods: Four or five strains each of commonly isolated bacteria from contact lens cases, Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, and Serratia marcescens, were grown, washed, mixed in equal proportions, and allowed to coaggregate for 24 hours. Lactose (0.06 M), sucrose (0.06 M), and pronase (2 mg/mL; 2 hours, 37°C) were used to inhibit coaggregation...
January 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28045312/black-stains-a-microbiological-analysis-and-a-view-on-familiarity-and-susceptibility-to-tooth-decay-of-patients-in-childhood
#3
D Tripodi, D Martinelli, M Pasini, M R Giuca, S D'Ercole
AIM: Assess prevalence, familial predisposition and susceptibility to caries of Black Stains (BS). Evaluate the microbiological composition of BS, saliva and subgingival plaque. MATERIALS AND METHODS: Sixty nine subjects with BS (test group) and 120 subjects without BS (control group) were analysed for oral status. For each BS-patient, a BS-deposit, 1 ml of saliva and subgingival plaque were collected and microbiologically analysed. Five deciduous teeth with BS were observed under SEM...
December 2016: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/28038683/the-gut-microbiota-in-conventional-and-serrated-precursors-of-colorectal-cancer
#4
Brandilyn A Peters, Christine Dominianni, Jean A Shapiro, Timothy R Church, Jing Wu, George Miller, Elizabeth Yuen, Hal Freiman, Ian Lustbader, James Salik, Charles Friedlander, Richard B Hayes, Jiyoung Ahn
BACKGROUND: Colorectal cancer is a heterogeneous disease arising from at least two precursors-the conventional adenoma (CA) and the serrated polyp. We and others have previously shown a relationship between the human gut microbiota and colorectal cancer; however, its relationship to the different early precursors of colorectal cancer is understudied. We tested, for the first time, the relationship of the gut microbiota to specific colorectal polyp types. RESULTS: Gut microbiota were assessed in 540 colonoscopy-screened adults by 16S rRNA gene sequencing of stool samples...
December 30, 2016: Microbiome
https://www.readbyqxmd.com/read/28034855/genome-sequence-of-actinomyces-naeslundii-strain-atcc-27039-isolated-from-an-abdominal-wound-abscess
#5
Chiho Mashimo, Kazuyoshi Yamane, Takeshi Yamanaka, Hugo Maruyama, Pao-Li Wang, Satoshi Komasa, Joji Okazaki, Takayuki Nambu
Here, we present the complete genome sequence of Actinomyces naeslundii strain ATCC 27039, isolated from an abdominal wound abscess. This strain is genetically transformable and will thus provide valuable information related to its crucial role in oral multispecies biofilm development.
December 29, 2016: Genome Announcements
https://www.readbyqxmd.com/read/28027806/-actinomycotic-brain-abscess-in-immunocompetent-patient
#6
Mikel Armendariz-Guezala, José Undabeitia-Huertas, Nicolás Samprón-Lebed, Marta Michan-Mendez, Irune Ruiz-Diaz, Enrique Úrculo-Bareño
BACKGROUND: The actinomyces is germ commonly found in the normal flora of the oral cavity and gastro-intestinal and uro-genital tracts. Involvement in other locations is a very uncommon event. OBJECTIVES: To describe a patient with an actinomicotyc brain abscess CLINICAL CASE: We report the case of a patient who suffered a seizure and decreased level of consciousness. Imaging tests revealed the presence of lesions both in the lung and in the brain. An urgent craniotomy was performed and the diagnosis of actinomicotyc abscess was obtained...
December 24, 2016: Cirugia y Cirujanos
https://www.readbyqxmd.com/read/27979634/actinomyces-meyeri-empyema
#7
Lucía Ferreiro, María Luisa Pérez Del Molino, Carlos Rábade, Luis Valdés
No abstract text is available yet for this article.
December 12, 2016: Archivos de Bronconeumología
https://www.readbyqxmd.com/read/27966440/actinomycosis-of-the-abdominal-wall-after-cholecystectomy-transferral-theory
#8
E-J Kooi, P J de Vries, A W W van Geloven, H V Stel, P J Kingma
Abdominal actinomycosis is a rare disease caused by Gram-positive anaerobic Actinomyces bacteria. Here, we present a patient with an intrauterine contraceptive device who developed a long lasting and unexplained recurrent, painful abdominal swelling a few months after a laparoscopic cholecystectomy.
December 2016: Netherlands Journal of Medicine
https://www.readbyqxmd.com/read/27965635/photoinactivation-using-visible-light-plus-water-filtered-infrared-a-vis-wira-and-chlorine-e6-ce6-eradicates-planktonic-periodontal-pathogens-and-subgingival-biofilms
#9
Ali Al-Ahmad, Aleksander Walankiewicz, Elmar Hellwig, Marie Follo, Christian Tennert, Annette Wittmer, Lamprini Karygianni
Alternative treatment methods for pathogens and microbial biofilms are required due to the widespread rise in antibiotic resistance. Antimicrobial photodynamic therapy (aPDT) has recently gained attention as a novel method to eradicate pathogens. The aim of this study was to evaluate the antimicrobial effects of a novel aPDT method using visible light (vis) and water infiltrated infrared A (wIRA) in combination with chlorine e6 (Ce6) against different periodontal pathogens in planktonic form and within in situ subgingival oral biofilms...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27901206/antimicrobial-activity-of-different-disinfectants-against-cariogenic-microorganisms
#10
Esra Uzer Celik, Ayse Tugce Tunac, Mustafa Ates, Bilge Hakan Sen
The aim of this study was to assess the in vitro antimicrobial effects of chlorhexidine digluconate (CHX), polyhexamethylene biguanide (PHBM), and octenidine dihydrochloride (OCT) on cariogenic microorganisms by using their minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). CHX, PHBM, and OCT were diluted in distilled water to the final test concentrations. Using the in-tube dilution method, Streptococcus mutans, Lactobacillus acidophilus, Lactobacillus rhamnosus, and Actinomyces viscosus were cultivated on blood agar and Mueller-Hinton broth (MHB) at 37°C for 48 h...
November 28, 2016: Brazilian Oral Research
https://www.readbyqxmd.com/read/27898021/salivary-microbiome-diversity-in-caries-free-and-caries-affected-children
#11
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/27896580/highly-improved-acarbose-production-of-actinomyces-through-the-combination-of-artp-and-penicillin-susceptible-mutant-screening
#12
Fei Ren, Long Chen, Qunyi Tong
Atmospheric and room temperature plasma (ARTP) was first employed to generate mutants of Actinomyces JN537 for improving acarbose production. To obtain higher acarbose producing strains, the method of screening the strains for susceptibility to penicillin was used after treatment with ARTP. The rationale for the strategy was that mutants showing penicillin susceptibility were likely to be high acarbose producers, as their ability to synthesize cell walls was weak which might enhance metabolic flux to the pathway of acarbose biosynthesis...
January 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/27870811/abdominal-actinomycosis-in-children-a-case-report-and-literature-review
#13
Noppadol Wacharachaisurapol, Jeffrey M Bender, Larry Wang, David Bliss, Skorn Ponrartana, Pia S Pannaraj
Abdominal actinomycosis is an uncommon pediatric infection that often manifests with a tumor-like lesion. We describe a previously healthy 11-year-old girl who presented with right lower quadrant abdominal pain and drainage. Computed tomography scan showed an abdominal wall mass. Surgical debridement cultures grew Actinomyces meyeri. Literature review identified 18 additional pediatric cases since 1964 that we have summarized.
November 18, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27843558/prevalence-of-bovine-milk-pathogens-in-azorean-pastures-mobile-versus-fixed-milking-machines
#14
C Azevedo, D Pacheco, L Soares, M Moitoso, J Maldonado, R Guix, J Simões
The aims of the present study were (1) to evaluate the influence of using mobile (n=47) or fixed (n=45) milking machines in Azorean herds on the apparent prevalence of several milk pathogens in bulk tank milk (BTM) and (2) to determine whether separated subclinical mastitic cows can serve, in real time, as predictors of milk pathogen prevalence for the remaining animals at the herd level. The use of a mobile or fixed milking machine influenced (P≤0.05) the prevalence of Staphylococcus aureus (72.3 per cent; n=34 v 51...
2016: Veterinary Record Open
https://www.readbyqxmd.com/read/27837345/molecular-detection-of-bacteria-associated-to-caries-activity-in-dentinal-lesions
#15
Beatriz Gonçalves Neves, Rafael Nóbrega Stipp, Daniela da Silva Bezerra, Sarah Florindo de Figueiredo Guedes, Lidiany Karla Azevedo Rodrigues
OBJECTIVES: This study aimed at identifying and quantifying Actinomyces naeslundii, Bifidobacterium spp., Streptococcus mitis group, Lactobacillus acidophilus, Lactobacillus casei group, Streptococcus gordonii, and Streptococcus mutans in active and inactive carious dentine lesions of children with early childhood caries by using quantitative polymerase chain reaction. MATERIAL AND METHODS: Fifty-six dentin lesion samples, classified as active (n = 39) or inactive (n = 17), were collected from children aged from 2 to 5 years old...
November 12, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27834171/bacterial-communities-associated-with-apical-periodontitis-and-dental-implant-failure
#16
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
https://www.readbyqxmd.com/read/27833819/salivary-microbiomes-of-indigenous-tsimane-mothers-and-infants-are-distinct-despite-frequent-premastication
#17
Cliff S Han, Melanie Ann Martin, Armand E K Dichosa, Ashlynn R Daughton, Seth Frietze, Hillard Kaplan, Michael D Gurven, Joe Alcock
BACKGROUND: Premastication, the transfer of pre-chewed food, is a common infant and young child feeding practice among the Tsimane, forager-horticulturalists living in the Bolivian Amazon. Research conducted primarily with Western populations has shown that infants harbor distinct oral microbiota from their mothers. Premastication, which is less common in these populations, may influence the colonization and maturation of infant oral microbiota, including via transmission of oral pathogens...
2016: PeerJ
https://www.readbyqxmd.com/read/27800254/canaliculitis-awareness
#18
Melike Balıkoğlu Yılmaz, Emine Şen, Ebru Evren, Ufuk Elgin, Pelin Yılmazbaş
OBJECTIVES: To evaluate the demographic characteristics, treatment, and results of patients with canaliculitis. MATERIALS AND METHODS: Medical records including the demographic characteristics, clinical findings, and treatment outcomes of patients diagnosed and treated for canaliculitis between September 2009 and March 2014 were analyzed retrospectively. RESULTS: The median age of the 7 canaliculitis patients consisting of 4 women and 3 men was 49 (range 8-58) years...
January 2016: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/27789164/-a-case-of-mediastinum-actinomycosis-by-aggregatibacter-actinomycetemcomitans
#19
N N M Razafimanjato, A M Portela, D M Radu, P Guiraudet, M D Destable, A Seguin, E Martinod
The actinomycosis is a suppurative infection due to an anaerobic and microaerophillic bacteria called actinomyces. Only few case reports are described for the mediastinal locations of this rare entity. We report a new case of inflammatory pseudotumor in the mediastinum due to Aggregatibacte actinomycetemcomitans revealed by hemoptysis. The mediastinoscopy procedure with biopsy was needed to confirm the definitive bacteriological diagnosis by a positive culture. During the postoperative course, a cutaneous fistula was found which had a favourable evolution after appropriate antibiotherapy...
December 2016: Revue de Pneumologie Clinique
https://www.readbyqxmd.com/read/27775308/-appendicular-actinomycosis-as-a-cause-of-ileocecal-mass-in-children-case-report
#20
M Fernández Castilla, A Salazar Villacorta, A Martín Nalda, J C Ferreres Piñas, A Coma Muñoz, G Guillén Burrieza
INTRODUCTION: Appendicular actinomycosis is a rare disease produced by cecal appendix invasion by Actinomyces gender bacteria after a predisposing cause that disrupts mucosal barrier, such as acute appendicitis. The highest frequency appears in adults; however, there are cases in paediatric age described in literature. The aim of this article is to introduce a case of appendicular actinomycosis in a child with atypical presentation and to review the literature. CLINICAL CASE: 10-year-old boy transferred to our hospital due to intraoperative finding at a different centre of a right flank tumor, without identification of cecal appendix...
July 20, 2015: Cirugía Pediátrica: Organo Oficial de la Sociedad Española de Cirugía Pediátrica
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