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https://www.readbyqxmd.com/read/28643960/asymptomatic-subcutaneous-cervical-mass-due-to-actinomyces-odontolyticus-infection-in-a-pyriform-sinus-fistula
#1
Ryu Yanagisawa, Kisei Minami, Noriko Kubota, Tamaki Iwade, Yoshifumi Ogiso
No abstract text is available yet for this article.
June 23, 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28634238/electron-transport-chain-is-biochemically-linked-to-pilus-assembly-required-for-polymicrobial-interactions-and-biofilm-formation-in-the-gram-positive-actinobacterium-actinomyces-oris
#2
Belkys C Sanchez, Chungyu Chang, Chenggang Wu, Bryan Tran, Hung Ton-That
The Gram-positive actinobacteria Actinomyces spp. are key colonizers in the development of oral biofilms due to the inherent ability of Actinomyces to adhere to receptor polysaccharides on the surface of oral streptococci and host cells. This receptor-dependent bacterial interaction, or coaggregation, requires a unique sortase-catalyzed pilus consisting of the pilus shaft FimA and the coaggregation factor CafA forming the pilus tip. While the essential role of the sortase machine SrtC2 in pilus assembly, biofilm formation, and coaggregation has been established, little is known about trans-acting factors contributing to these processes...
June 20, 2017: MBio
https://www.readbyqxmd.com/read/28629509/actinomyces-vulturis-sp-nov-isolated-from-gyps-himalayensis
#3
Xiangli Meng, Shan Lu, Yiting Wang, Xin-He Lai, Yumeng Wen, Dong Jin, Jing Yang, Xiangning Bai, Gui Zhang, Ji Pu, Riuting Lan, Jianguo Xu
Two strains of Gram-stain-positive, facultatively anaerobic, non-spore-forming short rods (VUL7T and VUL8) were isolated from rectal swabs of Old World vultures, namely Gyps himalayensis, in Tibet-Qinghai Plateau, China. Optimal growth occurred at 37 °C, pH 6-7, with 1 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences classified the two strains to the genus Actinomyces, with highest 16S rRNA gene sequence similarity (95 %) to type strains of Actinomyces haliotis, Actinomyces radicidentis and Actinomyces urogenitalis...
June 20, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28629506/actinomyces-liubingyangii-sp-nov-isolated-from-the-vulture-gypaetus-barbatus
#4
Xiangli Meng, Shan Lu, Xin-He Lai, Yiting Wang, Yumeng Wen, Dong Jin, Jing Yang, Jianguo Xu
Two strains (VUL4_1T and VUL4_2) of Gram-staining-positive, catalase-negative, non-spore-forming short rods were isolated from rectal swabs of Old World vultures (Gypaetus barbatus) in the Tibet-Qinghai Plateau, China. Analysis of morphological characteristics and biochemical tests indicated that the two strains closely resembled each other but were distinct from other species of the genus Actinomyces previously described. Based on the results of 16S rRNA gene sequence comparison and genome analysis, strains were determined to be members of the genus Actinomyces, closely related to the type strains of Actinomyces marimammalium (96...
June 20, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28625067/colonic-obstruction-secondary-to-actinomyces
#5
Manuel Alfonso Jiménez Moreno, Isabel Sánchez Pedrique, Estíbaliz Obregón Martínez
Actinomycosis is an uncommon granulomatous infection by Gram-positive anaerobic bacteria of the genus Actinomyces. A. israelii is a major human pathogen. The most frequent locations for colonization are cervicofacial (50%), abdominal (20%) and thoracic (15-20%). The abdominal actinomycosis predisposing factors include recent surgery, trauma and neoplasias. Certain cases have been associated with the intrauterine contraception device (IUD).
June 19, 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28622118/imaging-spectrum-of-invasive-fungal-and-fungal-like-infections
#6
Hilary L P Orlowski, Sebastian McWilliams, Vincent M Mellnick, Sanjeev Bhalla, Meghan G Lubner, Perry J Pickhardt, Christine O Menias
Invasive fungal and fungal-like infections contribute to substantial morbidity and mortality in immunocompromised individuals. The incidence of these infections is increasing-largely because of rising numbers of immunocompromised patients, including those with neutropenia, human immunodeficiency virus, chronic immunosuppression, indwelling prostheses, burns, and diabetes mellitus, and those taking broad-spectrum antibiotics. Invasive fungal pathogens include primary mycotic organisms such as Histoplasma capsulatum, Coccidioides immitis, Blastomyces dermatitidis, and Paracoccidioides brasiliensis, which are true pathogens and inherently virulent...
June 16, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28613914/effect-of-rhizobacteria-on-arsenic-uptake-by-macrophyte-eichhornia-crassipes-mart-solms
#7
Parvinder Kaur, Simranjeet Singh, Vivek Kumar, Nasib Singh, Joginder Singh
Wastewater from municipal systems and industrial processes carries several trace metals including metalloid arsenic (As) which are considered serious environmental contaminants due to toxicity, and recalcitrant nature. In this study, we determined the phytoremediation of As by Eichhornia crassipes (Mart.) Solms either alone or in association with plant growth promoting rhizobacteria. Pseudomonas and Azotobacter inoculation to E. crassipes resulted in enhanced As removal compared to uninoculated control. Co-inoculation with a consortium of Pseudomonas, Azotobacter, Azospirillum, Actinomyces and Bacillus resulted in higher As (p<0...
June 14, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28590243/detection-of-actinomyces-spp-in-cervical-exudates-from-women-with-cervical-intraepithelial-neoplasia-or-cervical-cancer
#8
Alejandra García-García, Jaime Coronel-Martínez, David Cantú-de Leon, María Del Socorro Romero-Figueroa, Yolanda Elizabeth Caballero-Pantoja, Gauddy Lizeth Manzanares-Leal, Miguel Rodriguez-Morales, Horacio Sandoval-Trujillo, Ninfa Ramírez-Durán
PURPOSE: Under certain circumstances, Actinomyces behaves as an opportunistic microorganism and can cause actinomycosis, a chronic and inflammatory granulomatous infection. The purpose of this project was to detect the presence of Actinomyces in cervical exudates from women with cervical intraepithelial neoplasia (CIN) and women with cervical cancer. METHODOLOGY: Cervical samples from 92 women were divided into three groups: CIN, cervical cancer and healthy women...
June 8, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28566877/actinomyces-associated-lesions-located-in-the-gingiva-case-report-of-rare-gingival-lesions
#9
Buket Acar, Feriha Çağlayan, Ahmet Çağkan İnkaya, Olcay Kurtulan
Actinomyces spp. are located without displaying any pathogenic effect in the oral flora. However, the disruption of oral microenvironmental balance, mucosal tissue integrity, and defense system can cause microorganisms to settle on deep periodontal tissues and to induce pathologic reactions. The present case report describes erythematous and desquamative lesions with pseudomembrane limited to the gingiva. In the histopathologic examination, Actinomyces colonies were isolated from the gingiva. On the basis of histopathologic and laboratory findings, the lesions were diagnosed as Actinomyces- associated lesions of the gingiva...
January 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/28554609/biofilm-induced-changes-to-the-composite-surface
#10
Ivana Nedeljkovic, Jan De Munck, Andreea-Alexandra Ungureanu, Vera Slomka, Carmen Bartic, Anja Vananroye, Christian Clasen, Wim Teughels, Bart Van Meerbeek, Kirsten L Van Landuyt
OBJECTIVES: Composites may undergo biodegradation in the oral cavity. The objective was to investigate the effect of single- and multi-species biofilms on the surface roughness and topography of two composites. METHODS: Disk-shaped specimens of a paste-like, Bis-GMA-free (Gradia Direct Anterior, GC), and a flowable, Bis-GMA-based composite (Tetric EvoFlow, Ivoclar-Vivadent) were prepared. After ethylene-oxide sterilization (38°C), specimens (n=3) were incubated with Streptococcus mutans or mixed bacterial culture (Streptococcus mutans, Streptococcus sanguinis, Actinomyces naeslundii and Fusobacterium nucleatum)...
May 26, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28536687/abdominal-and-pelvic-actinomycosis-due-to-longstanding-intrauterine-device-a-slow-and-devastating-infection
#11
Evelyn Sue Nakahira, Linda Ferreira Maximiano, Fabiana Roberto Lima, Edson Yassushi Ussami
Actinomycosis is a chronic or subacute bacterial infection characterized by large abscess formation, caused mainly by the gram-positive non-acid-fast, anaerobic, or microaerophilic/capnophilic, obligate parasites bacteria from the Actinomyces genus. Although pelvic inflammatory disease is an entity associated with the longstanding use of intrauterine devices (IUDs), actinomycosis is not one of the most frequent infections associated with IUDs. We present the case of a 43-year-old female patient who was referred to the emergency facility because of a 20-day history of abdominal pain with signs of peritoneal irritation...
January 2017: Autopsy & case reports
https://www.readbyqxmd.com/read/28536234/actinomycosis-presenting-as-an-anterior-abdominal-mass-after-laparoscopic-cholecystectomy
#12
Zainab Alhumoud, Amro Salem
Abdominal actinomycosis is a rare disease caused by different anaerobic Actinomyces species. We report the case of a 55-year-old woman who presented with a painless, slow growing, left upper abdominal mass that developed after a laparoscopic cholecystectomy. A CT scan and MRI of the abdomen revealed a desmoid tumour of the left rectus abdominis muscle.Surgical excision was performed with an uneventful postoperative course. The histological analysis of the specimen was inconsistent with a desmoid tumour and revealed an infection of Actinomyces israelii in the anterior abdominal wall that was confirmed with a microbiology culture...
May 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28531869/a-rare-case-of-subacute-appendicitis-actinomycosis-as-the-final-pathology-reports-a-case-report-and-literature-review
#13
G A Gómez-Torres, O S Ortega-Gárcia, E G Gutierrez-López, C A Carballido-Murguía, J A Flores-Rios, C R López-Lizarraga, C A Bautista López, C F Ploneda-Valencia
INTRODUCTION: Acute appendicitis is the most common indication for an emergency abdominal surgery in the world, with a lifetime incidence of around 10%. Actinomycetes are the etiology of appendicitis in only 0.02%-0.06%, having as the final pathology report a chronic inflammatory response; less than 10% of the cases are diagnosed before surgery. Here, we present the case of a subacute appendicitis secondary to actinomycosis. CASE REPORT: A 39-year-old male presented with a twelve-day evolution of intermittent abdominal pain in the right lower quadrant, treated at the beginning with ciprofloxacin and urinary analgesic...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28507764/-actinomyces-provencensis-sp-nov-corynebacterium-bouchesdurhonense-sp-nov-corynebacterium-provencense-sp-nov-and-xanthomonas-massiliensis-sp-nov-4-new-species-isolated-from-fresh-stools-of-obese-french-patients
#14
S Ndongo, C Andrieu, P-E Fournier, J-C Lagier, D Raoult
We report the main characteristics of 'Actinomyces provencensis' strain SN12(T) sp. nov., 'Corynebacterium bouchesdurhonense' strain SN14(T) sp. nov., 'Corynebacterium provencense' strain SN15(T) sp. nov. and 'Xanthomonas massiliensis' strain SN8(T) sp. nov., which were all isolated from stool samples from obese French patients.
July 2017: New Microbes and New Infections
https://www.readbyqxmd.com/read/28504503/-cervicofacial-actinomycosis-as-differential-diagnosis-of-cavum-carcinoma-case-report
#15
Eliana T Anteliz García, Carolina M Carballo, Samanta Estévez, Sofía Diana, Arturo de Mena, Gabriela Manonelles, Claudia I Cazes, Eduardo L López
Paediatric actinomycosis is an infrequent infectious disease caused by Actinomyces spp. Cervicofacial infections are usually related to disruption in oral mucosal membranes. We discuss the case of a 15-year-old girl who refers an 8-month history of odynophagia and changes in her tone of voice after getting a tongue piercing. She received multiple antibiotic treatments with slight improvement. Nasopharyngeal carcinoma was diagnosed by endoscopic biopsy. The patient was referred to our Hospital for treatment but, when the biopsy was analyzed again, oncological pathology was excluded and oropharyngeal actinomycosis was diagnosed...
June 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28485830/diagnosis-and-management-of-pyothorax-in-a-domestic-ferret-mustela-putorius-furo
#16
Izidora Sladakovic, Benjamin M Brainard, Selena L Lane, Scott A Secrest, Andrew J Fox, Jaime L Tarigo, Corry K Yeuroukis, Susan Sanchez, Laila M Proenca, Joerg Mayer
OBJECTIVE: To describe the diagnosis, management, and outcome of pyothorax in a domestic ferret (Mustela putorius furo). CASE SUMMARY: A domestic ferret was evaluated for a history of lethargy, anorexia, and pyrexia. Pleural effusion was detected with radiography and ultrasonography, and a diagnosis of pyothorax was made following cytologic evaluation of pleural fluid. Bilateral thoracostomy tubes were placed for thoracic drainage and lavage, and the ferret was treated with intravenous crystalloid fluids, antimicrobials, and analgesics...
May 9, 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28476771/signature-of-microbial-dysbiosis-in-periodontitis
#17
Vincent Meuric, Sandrine Le Gall-David, Emile Boyer, Luis Acuña-Amador, Bénédicte Martin, Shao Bing Fong, Frederique Barloy-Hubler, Martine Bonnaure-Mallet
Periodontitis is driven by a disproportionate host inflammatory immune response induced by an imbalance in the composition of oral bacteria. It instigates microbial dysbiosis along with failed resolution of the chronic destructive inflammation.The objective of this study is to identify microbial signatures for health and chronic periodontitis at the genus level and to propose a model of dysbiosis including the calculation of bacterial ratios. DESIGN AND METHODS: Published sequencing data obtained from several different studies (196 sub-gingival samples from patients with chronic periodontitis and 422 sub-gingival samples from healthy subjects) were pooled and submitted to a new microbiota analysis using the same VAMPS (Visualization and Analysis of Microbial Population Structures) analysis pipeline to identify microbiota specific to health and disease...
May 5, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28468217/cervicofacial-primary-cutaneous-actinomycosis-surgical-treatment-for-complete-remission-of-the-disease
#18
Yeon Jin Jeong, Hyo Wan Suh, Hyung-Sup Shim
Actinomycosis, an infectious bacterial disease caused by Actinomyces species, is very rare and is characterized by contiguous spreading, subacute to chronic granulomatous inflammation and the formation of multiple abscesses and sinus tracts that may discharge sulfur granules. Actinomycosis that presents on the skin without endogenous origin is called primary cutaneous actinomycosis, and the occurrence and treatment of primary cutaneous actinomycosis is rarely reported. This report describes the treatment of primary cervicofacial actinomycosis with a literature review, and emphasizes the importance of surgical option for complete remission of the disease...
May 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28462153/primary-actinomycosis-in-the-breast-caused-by-actinomyces-neuii-a-report-of-2-cases
#19
B S Leenstra, C C M Schaap, M Bessems, N H M Renders, K Bosscha
Actinomycosis is a slowly progressive infection caused by anaerobic bacteria, primarily from the genus Actinomyces. Primary actinomycosis of the breast is rare and presents as a mass like density which can mimic malignancy. Mammography, ultrasonography and histopathologic examination is required for diagnosis. Treatment should consist of high doses of antibacterials for a prolonged period of time and possibly surgical drainage. Primary actinomycosis infections are commonly caused by A. israelii. Actinomyces neuii is a less common cause of classical actinomycosis...
2017: IDCases
https://www.readbyqxmd.com/read/28442730/exploration-of-the-relationship-between-biogas-production-and-microbial-community-under-high-salinity-conditions
#20
Shaojie Wang, Xiaocong Hou, Haijia Su
High salinity frequently causes inhibition and even failure in anaerobic digestion. To explore the impact of increasing NaCl concentrations on biogas production, and reveal the microbial community variations in response to high salinity stress, the Illumina high-throughput sequencing technology was employed. The results showed that a NaCl concentration of 20 g/L (H group) exhibited a similar level of VFAs and specific CO2 production rate with that in the blank group, thus indicating that the bacterial activity in acidogenesis might not be inhibited...
April 25, 2017: Scientific Reports
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