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https://www.readbyqxmd.com/read/29445480/hemolytic-anemia-due-to-native-valve-subacute-endocarditis-with-actinomyces-israelii-infection
#1
Sudhamshi Toom, Yiqing Xu
This case highlights the importance of considering infectious etiology in the management of hemolytic anemia. Hemolytic anemia associated with infectious endocarditis is rare. Actinomyces endocarditis is a rare occurrence and is very challenging to diagnose given the challenges to culture the organism.
February 2018: Clinical Case Reports
https://www.readbyqxmd.com/read/29410255/antimicrobial-efficacy-of-photodynamic-therapy-and-light-activated-disinfection-on-contaminated-zirconia-implants-an-in-vitro-study
#2
Bleron Azizi, Ana Budimir, Ivona Bago, Blerim Mehmeti, Suzana Jakovljević, Jeta Kelmendi, Aleksandra Presecki Stanko, Dragana Gabrić
BACKGROUND: We aimed to evaluate the antimicrobial efficacy of photodynamic therapy (PDT) and light-activated disinfection (LAD) on zirconia dental implants contaminated with three bacterial species and investigate if the PDT and LAD cause implant surface alterations. METHODS: Seventy-two zirconia dental implants were contaminated with a bacterial suspension of Prevotella intermedia, Actinomyces actinomycetemcomitans, and Porphyromonas gingivalis. The implants were subsequently randomly divided into four groups (n = 12 dental implants/each) according to the decontamination protocol: Group 1 (PDT1) - PDT (660 nm, 100 mW) with toluidine blue; Group 2 (PDT2) - PDT (660 nm, 100 mW) with phenothiazine chloride dye; Group 3 (LAD) - light emitting diode (LED) with toluidine blue; and Group 4 (TB) - toluidine blue without the application of light...
February 1, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29392046/relation-of-actinomyces-with-tonsillar-hypertrophy-and-antibiotic-use
#3
Leyla Kansu
Objective: This study aimed to investigate the incidence of Actinomyces in tonsillar tissues of patients undergoing tonsillectomy and to determine the association among tonsillar volume, preoperative antibiotic use, and presence of Actinomyces in tonsil tissues. Methods: In this study, 142 patients who underwent tonsillectomy in last four years were included. Of the total patients, 97 (66.9%) were children and 47 (33.1%) were adults. The patients' age, sex, preoperative antibiotic use, tonsillar volume, and presence of actinomyces in tonsillar tissues were recorded...
March 2017: Turkish Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/29374769/fournier-s-gangrene-clinical-presentation-of-13-cases
#4
Bolesław Kuzaka, Marta M Wróblewska, Tomasz Borkowski, Dariusz Kawecki, Piotr Kuzaka, Grażyna Młynarczyk, Piotr Radziszewski
BACKGROUND Fournier's gangrene (FG) is a fulminant form of infective, polymicrobial, necrotizing fasciitis of the perineal, genital, and perianal regions. It commonly affects men, but women and children may also develop this type of tissue necrosis. MATERIAL AND METHODS This study is a retrospective analysis of the management of 13 cases of Fournier's gangrene, diagnosed from among about 45 000 patients (men, women, and children) treated in the Department of General, Oncological, and Functional Urology (Medical University of Warsaw) from 1995 to 2013...
January 28, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29372443/sensitivity-of-caries-pathogens-to-antimicrobial-peptides-related-to-caries-risk
#5
Julia Eliette Goeke, Stefan Kist, Sören Schubert, Reinhard Hickel, Karin Christine Huth, Maximilian Kollmuss
OBJECTIVES: Antimicrobial peptides (AMPs) represent important facets of the immune system controlling infectious diseases. However, pathogens show varying susceptibilities to AMPs. This study investigates the susceptibilities of strains of Streptococcus mutans (SM), Actinomyces naeslundii (AN), and Lactobacillus spp. (LB) towards AMPs and if there are correlations between the appearance of such high-risk strains and clinical caries status. MATERIAL AND METHODS: Plaque samples were collected from patients along with clinical examinations...
January 25, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29371629/alterations-of-oral-microbiota-distinguish-children-with-autism-spectrum-disorders-from-healthy-controls
#6
Yanan Qiao, Mingtao Wu, Yanhuizhi Feng, Zhichong Zhou, Lei Chen, Fengshan Chen
Altered gut microbiota is associated with autism spectrum disorders (ASD), a group of complex, fast growing but difficult-to-diagnose neurodevelopmental disorders worldwide. However, the role of the oral microbiota in ASD remains unexplored. Via high-throughput sequencing of 111 oral samples in 32 children with ASD and 27 healthy controls, we demonstrated that the salivary and dental microbiota of ASD patients were highly distinct from those of healthy individuals. Lower bacterial diversity was observed in ASD children compared to controls, especially in dental samples...
January 25, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29369919/actinomycotic-endometritis
#7
Andres G Chiesa-Vottero
Seven cases of actinomycotic endometritis were identified among 28,906 endometrial biopsies performed in the last 10 yr. The patients' ages ranged from 44 to 85 yr old. An intrauterine device was in place from 7 to 44 yr. The reasons to perform the biopsies included abnormal uterine bleeding, malodor, prolapse, pelvic inflammatory disease, and suspicion of metastatic uterine sarcoma. Definitive identification of Actinomyces israelii by culture was obtained in 1 case only. Gram, Gomori methenamine silver, and Fite stains were useful in the differential diagnosis with pseudoactinomycotic granules, Nocardia, fungi, and other bacteria...
January 24, 2018: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/29358546/disinfectant-efficacy-of-0-525-sodium-hypochlorite-and-epimax-on-alginate-impression-material
#8
Gopal Krishna Choudhury, Rajkiran Chitumalla, Litto Manual, Santosh Kumar Rajalbandi, Mahinder Singh Chauhan, Pratim Talukdar
AIM: Species of Streptococcus, Escherichia coli, Staphylococcus, Actinomyces, Pseudomonas, Klebsiella, and Candida are commonly seen in the oral cavity. Impression materials are commonly contaminated with microorganisms. The present study was conducted to assess the disinfection efficacy of Epimax and 0.525% sodium hypochlorite on alginate impression over a period of 10 minutes. MATERIALS AND METHODS: This study was conducted in the Department of Prosthodontics in the year 2015...
January 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29355427/stannous-fluoride-effects-on-gene-expression-of-streptococcus-mutans-and-actinomyces-viscosus
#9
Y Shi, R Li, D J White, A R Biesbrock
A genome-wide transcriptional analysis was performed to elucidate the bacterial cellular response of Streptococcus mutans and Actinomyces viscosus to NaF and SnF2. The minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) of SnF2 were predetermined before microarray study. Gene expression profiling microarray experiments were carried out in the absence (control) and presence (experimental) of 10 ppm and 100 ppm Sn2+ (in the form of SnF2) and fluoride controls for 10-min exposures (4 biological replicates/treatment)...
February 2018: Advances in Dental Research
https://www.readbyqxmd.com/read/29355418/rebalancing-the-caries-microbiome-dysbiosis-targeted-treatment-and-sugar-alcohols
#10
L Zhan
Dental caries is a disease that results from microbiome dysbiosis with the involvement of multiple cariogenic species, including mutans streptococci (MS), lactobacilli, Scardovia wiggsiae, and several Actinomyces species that have the cariogenic traits of acid production and acid tolerance. Sugar consumption also plays an important role interacting with microbiome dysbiosis, determining the fate of caries development. In addition, the MS transmission that encompasses multiple sources can have long-term impacts on the oral microbiome and caries development in children...
February 2018: Advances in Dental Research
https://www.readbyqxmd.com/read/29355414/the-caries-microbiome-implications-for-reversing-dysbiosis
#11
A C R Tanner, C A Kressirer, S Rothmiller, I Johansson, N I Chalmers
The oral microbiome plays a critical role in maintaining oral health. Frequent dietary carbohydrate intake can lead to dysbiosis of the microbial community from overproduction of acid with selection for increases in acidogenic, acid-tolerant bacteria. Knowledge of the caries-associated microbiome is key in planning approaches to reverse the dysbiosis to achieve health. For risk assessment and treatment studies, it would be valuable to establish whether microbial monitoring requires assay of multiple species or whether selected key species would suffice...
February 2018: Advances in Dental Research
https://www.readbyqxmd.com/read/29348917/refractory-actinomycosis-of-the-humerus
#12
Mariano O Abrego, Franco L De Cicco, Noelia B Montenegro, Jorge G Boretto, Pablo De Carli, Gerardo L Gallucci
Actinomycosis is a chronic, opportunistic infection caused by Actinomyces species, such as Actinomyces bacillus. Actinomycosis in long bones is very rare. To the best of our knowledge, isolated primary actinomycosis of the humerus is rarely reported in literature. We present a rare case of a refractory primary actinomycosis of the humerus. A 66-year-old man with no history of concomitant conditions was admitted to our hospital with a history of a tumour on the distal third of the left arm as a result of a closed trauma without fracture 20 years before...
2018: SAGE Open Medical Case Reports
https://www.readbyqxmd.com/read/29337224/an-experimental-study-for-rapid-detection-and-quantification-of-endodontic-microbiota-following-photo-activated-disinfection-via-new-multiplex-real-time-pcr-assay
#13
Maryam Pourhajibagher, Reza Raoofian, Roghayeh Ghorbanzadeh, Abbas Bahador
BACKGROUND: The infected root canal system harbors one of the highest accumulations of polymicrobial infections. Since the eradication of endopathogenic microbiota is a major goal in endodontic infection therapy, photo-activated disinfection (PAD) can be used as an alternative therapeutic method in endodontic treatment. Compared to cultivation-based approaches, molecular techniques are more reliable for identifying microbial agents associated with endodontic infections. The purpose of this study was to evaluate the ability of designed multiplex real-time PCR protocol for the rapid detection and quantification of six common microorganisms involved in endodontic infection before and after the PAD...
January 11, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29332208/localised-aggressive-periodontitis-in-a-3-year-old-boy
#14
E Mass, F Hershkovitz, U Zilberman
BACKGROUND: Localised aggressive periodontitis (LAgP), characterised by rapid attachment and bone loss, which may occur in children and adolescents, without clinical evidence of systemic disease. CASE REPORT: Three-year-old boy was referred with excessive mobility of 83 and exfoliation of 73. Clinical examination revealed acceptable oral hygiene. Blood tests were performed to evaluate PMNs activity and the parents were advised to apply 0.2% chlorhexidine twice a day...
January 13, 2018: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/29325875/fatal-thoracic-empyema-involving-campylobacter-rectus-a-case-report
#15
A Noël, A Verroken, L Belkhir, H Rodriguez-Villalobos
We report the case of a 69-year-old man admitted for septic shock secondary to necrotic pneumoniae complicated by thoracic empyema of fatal issue. Microbiological examination of pleural liquid revealed a mixed anaerobic flora involving Campylobacter rectus and Actinomyces meyeri. Campylobacter rectus is an infrequent anaerobic pathogen of oral origin To our knowledge, this is the first case report of fatal C. rectus - associated thoracic empyema, and only the second reported case in which identification was successfully performed by MALDI-TOF MS...
January 8, 2018: Anaerobe
https://www.readbyqxmd.com/read/29297559/antimicrobial-activity-and-biocompatibility-of-the-psidium-cattleianum-extracts-for-endodontic-purposes
#16
Loiane Massunari, Renata Zoccal Novais, Márcio Teixeira Oliveira, Diego Valentim, Eloi Dezan Junior, Cristiane Duque
Psidium cattleianum (PC) has been displaying inhibitory effect against a variety of microorganisms, but this effect has not yet been tested against endodontic pathogens. The aim of this study was to evaluate the antimicrobial activity and biocompatibility of the aqueous (PCAE) and hydroethanolic (PCHE) extracts from Psidium cattleianum (PC) leaves. Minimum inhibitory concentration (MIC) and minimum lethal concentration (MLC) were determined using the microdilution broth method in order to analyze the antimicrobial effect against Enterococcus faecalis, Pseudomonas aeruginosa, Actinomyces israelii and Candida albicans in planktonic conditions...
May 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29284195/extracellular-matrix-influence-in-streptococcus-mutans-gene-expression-in-a-cariogenic-biofilm
#17
Elkin Jahir Florez Salamanca, Marlise Inêz Klein
Caries etiology is biofilm-diet dependent. Biofilms are highly dynamic and structured microbial communities enmeshed in a three-dimensional extracellular matrix. The study evaluated the expression dynamics of Streptococcus mutans genes associated with exopolysaccharides (EPS) (gtfBCD, gbpB, dexA), lipoteichoic acids (LTA) (dltABCD, SMU_775c) and extracellular DNA (eDNA) (lytST, lrgAB, ccpA) during matrix development within a mixed-species biofilm of S. mutans, Actinomyces naeslundii and Streptococcus gordonii...
December 28, 2017: Molecular Oral Microbiology
https://www.readbyqxmd.com/read/29279791/pulmonary-mycobacterium-avium-intracellulare-complex-infection-in-an-infant-a-silent-and-coincidental-finding
#18
Vishal Naik, Pui-Ying Iroh Tam, William Gershan, Andrew A Colin, Nadir Demirel
An 11-month-old healthy infant girl was noted to have left lower lobe (LLL) opacities on chest X-ray (CXR) after developing desaturations during an elective cochlear implant surgery. Repeat CXR 10 days later revealed hyperexpansion of the left lung and persistent LLL opacity. Chest computerized tomography revealed enlarged mediastinal lymph nodes, left mainstem bronchial obstruction, and nodular opacities. Bronchoscopic biopsy of the endobronchial tissue revealed multiple necrotizing granulomas and grew Mycobacterium avium-intracellulare, Streptococcus viridans, and Actinomyces odontolyticus...
December 1, 2017: Pediatric Allergy, Immunology, and Pulmonology
https://www.readbyqxmd.com/read/29279769/biofilm-formation-on-denture-base-resin-including-zno-cao-and-tio2-nanoparticles
#19
Melissa Anwander, Martin Rosentritt, Sibylle Schneider-Feyrer, Sebastian Hahnel
PURPOSE: This laboratory study aimed to investigate the effect of doping an acrylic denture base resin material with nanoparticles of ZnO, CaO, and TiO2 on biofilm formation. MATERIALS AND METHODS: Standardized specimens of a commercially available cold-curing acrylic denture base resin material were doped with 0.1, 0.2, 0.4, or 0.8 wt% commercially available ZnO, CaO, and TiO2 nanopowder. Energy dispersive X-ray spectroscopy (EDX) was used to identify the availability of the nanoparticles on the surface of the modified specimens...
December 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29277334/neurological-disease-may-precede-lymphadenopathies-in-actinomyces-europaeus-infection
#20
Silvia Corcione, Antonio Curtoni, Ivana A Paolucci, Giovanni Di Perri, Francesco G De Rosa, Rossana Cavallo
Actinomyces species are part of the commensal flora of the mucous membranes of the oropharynx, gastrointestinal tract and female genital tract. Actinomyces europaeus is a short, nonmotile, facultative anaerobic rod first described in 1997, susceptible in vitro to a wide range of b-lactam antibiotics which are regarded as first choice. In this report we described the case of A. europaeus infection in a young female patient admitted to Intensive Care Unit and the possible damage of vascular endothelium due to a chronic progressive actinomycosis that at first involved neck soft tissue, then cervical lymphnodes, and finally extended to the vascular structure...
December 22, 2017: Journal of Infection and Public Health
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