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infectious endocarditis

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https://www.readbyqxmd.com/read/28432161/aggregatibacter-actinomycetemcomitans-pneumonia-with-chest-and-abdominal-wall-involvement
#1
Iris Storms, Marre van den Brand, Peter Schneeberger, Nico van 't Hullenaar
A 54-year-old man presented with a productive cough, chest pain, fever and weight loss. Initial analysis revealed a palpable chest wall mass and consolidation in the left lower lobe and pleural abnormalities on imaging. At that point no infectious cause or malignancy was identified. Microbiological analysis of a needle biopsy from a newly developed abdominal wall mass revealed growth of Aggregatibacter actinomycetemcomitans The patient was successfully treated with antibiotic therapy for 1 year. Aggregatibacter actinomycetemcomitans is a Gram-negative coccobacillus and is part of the normal oral flora...
April 21, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28417489/management-of-septic-emboli-in-patients-with-infectious-endocarditis
#2
Seyed Hossein Aalaei-Andabili, Tomas Martin, Phillip Hess, Brian Hoh, Meshka Anderson, Charles T Klodell, Thomas M Beaver
BACKGROUND AND AIM: Septic emboli (SE) associated with infectious endocarditis (IE) can result in splenic abscesses and infectious intracranial aneurysms (IIA). We investigated the impact of SE on patient outcomes following surgery for IE. METHOD: From January-2000 to October-2015, all patients with surgical IE (n = 437) were evaluated for incidence and management of SE. RESULTS: Overall SE was found in 46/437 (10.52%) patients (n = 17 spleen, 13 brain, and 16 both)...
April 17, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/28412525/liver-microbiome-of-peromyscus-leucopus-a-key-reservoir-host-species-for-emerging-infectious-diseases-in-north-america
#3
A André, A Mouton, V Millien, J Michaux
Microbiome studies generally focus on the gut microbiome, which is composed of a large proportion of commensal bacteria. Here we propose a first analysis of the liver microbiome using next generation sequencing as a tool to detect potentially pathogenic strains. We used Peromyscus leucopus, the main reservoir host species of Lyme disease in eastern North America, as a model and sequenced V5-V6 regions of the 16S gene from 18 populations in southern Quebec (Canada). The Lactobacillus genus was found to dominate the liver microbiome...
April 13, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28410379/new-insights-into-valve-related-intramural-and-intracellular-bacterial-diversity-in-infective-endocarditis
#4
Andreas Oberbach, Nadine Schlichting, Stefan Feder, Stefanie Lehmann, Yvonne Kullnick, Tilo Buschmann, Conny Blumert, Friedemann Horn, Jochen Neuhaus, Ralph Neujahr, Erik Bagaev, Christian Hagl, Maximilian Pichlmaier, Arne Christian Rodloff, Sandra Gräber, Katharina Kirsch, Marcus Sandri, Vivek Kumbhari, Armirhossein Behzadi, Amirali Behzadi, Joao Carlos Correia, Friedrich Wilhelm Mohr, Maik Friedrich
AIMS: In infective endocarditis (IE), a severe inflammatory disease of the endocardium with an unchanged incidence and mortality rate over the past decades, only 1% of the cases have been described as polymicrobial infections based on microbiological approaches. The aim of this study was to identify potential biodiversity of bacterial species from infected native and prosthetic valves. Furthermore, we compared the ultrastructural micro-environments to detect the localization and distribution patterns of pathogens in IE...
2017: PloS One
https://www.readbyqxmd.com/read/28408901/serine-rich-repeat-adhesins-contribute-to-streptococcus-gordonii-induced-maturation-of-human-dendritic-cells
#5
Eun Byeol Ko, Sun Kyung Kim, Ho Seong Seo, Cheol-Heui Yun, Seung Hyun Han
Dendritic cells (DCs) play a pivotal role in the induction of immunity by recognition, capture, process, and presentation of antigens from infectious microbes. Streptococcus gordonii is able to cause life-threatening systemic diseases such as infective endocarditis. Serine-rich repeat (SRR) glycoproteins of S. gordonii are sialic acid-binding adhesins mediating the bacterial adherence to the host and the development of infective endocarditis. Thus, the SRR adhesins are potentially involved in the bacterial adherence to DCs and the maturation and activation of DCs required for the induction of immunity to S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28403796/riboswitches-as-potential-targets-for-the-development-of-anti-biofilm-drugs
#6
José A Reyes-Darias, Tino Krell
In nature, bacteria can exist as single motile cells or as sessile cellular community, known as microbial biofilms. Bacteria within biofilms are embedded in a self-produced extracellular matrix that makes them more resistant to antibiotic treatment and responses of the host immune system. Microbial biofilms are very important in medicine since they are associated with several human diseases such as dental caries, periodontitis, otitis media, infective endocarditis, infectious kidney stones, osteomyelitis or prostatitis...
April 7, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28401448/the-changing-epidemiology-of-infective-endocarditis-in-the-twenty-first-century
#7
REVIEW
J Ambrosioni, M Hernandez-Meneses, A Téllez, J Pericàs, C Falces, J M Tolosana, B Vidal, M Almela, E Quintana, J Llopis, A Moreno, José M Miro
PURPOSE OF THE REVIEW: Infective endocarditis (IE) is a relatively infrequent infectious disease. It does, however, causes serious morbidity, and its mortality rate has remained unchanged at approximately 25%. Changes in IE risk factors have deeply impacted its epidemiology during recent decades but literature from low-income countries is very scarce. Moreover, prophylaxis guidelines have recently changed and the impact on IE incidence is still unknown. RECENT FINDINGS: In high-income countries, the proportion of IE related to prior rheumatic disease has decreased significantly and has been replaced proportionally by cases related to degenerative valvulopathies, prosthetic valves, and cardiovascular implantable electronic devices...
May 2017: Current Infectious Disease Reports
https://www.readbyqxmd.com/read/28369398/oral-streptococcal-endocarditis-oral-hygiene-habits-and-recent-dental-procedures-a-case-control-study
#8
Xavier Duval, Sarah Millot, Catherine Chirouze, Christine Selton-Suty, Vanessa Moby, Pierre Tattevin, Christophe Strady, Edouard Euvrard, Nelly Agrinier, Daniel Thomas, Bruno Hoen, François Alla
Aims: To compare oral hygiene habits, oro-dental status, and dental procedures in patients with infective endocarditis (IE) according to whether the IE-causing microorganism originated in the oral cavity. Methods: We conducted an assessor-blinded case-control study in 6 French tertiary-care hospitals. Oral hygiene habits were recorded using a self-administered questionnaire. Oro-dental status was analysed by trained dental practitioners blinded to the microorganism, using standardized clinical examination and dental panoramic tomography...
March 22, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28335676/physiopathological-approach-to-infective-endocarditis-in-chronic-hemodialysis-patients-left-heart-versus-right-heart-involvement
#9
Yassamine Bentata
Infectious endocarditis (IE), a complication that is both cardiac and infectious, occurs frequently and is associated with a heavy burden of morbidity and mortality in chronic hemodialysis patients (CHD). About 2-6% of chronic hemodialysis patients develop IE and the incidence is 50-60 times higher among CHD patients than in the general population. The left heart is the most frequent location of IE in CHD and the different published series report a prevalence of left valve involvement varying from 80% to 100%...
November 2017: Renal Failure
https://www.readbyqxmd.com/read/28329330/three-port-one-incision-plus-two-port-endoscopic-mitral-valve-surgery-without-robotic-assistance
#10
Toshiaki Ito, Atsuo Maekawa, Satoshi Hoshino, Yasunari Hayashi, Sadanari Sawaki, Junji Yanagisawa, Masayoshi Tokoro
OBJECTIVES: Totally endoscopic minimally invasive mitral valve surgery (MIMVS) is technically demanding and often performed with robotic assistance. We hypothesized that three-port video-assisted thoracic surgery (VATS) would facilitate endoscopic MIMVS and evaluated its feasibility and safety. METHODS: From October 2010 to June 2016, we performed first-time MIMVS in 250 consecutive patients (122 male), with median age of 65 years (54-73 years, 25-75 percentile)...
May 1, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28325766/staphylococcal-%C3%AE-toxin-modulates-human-aortic-endothelial-cell-and-platelet-function-through-sphingomyelinase-and-biofilm-ligase-activities
#11
Alfa Herrera, Katarina Kulhankova, Vijay K Sonkar, Sanjana Dayal, Aloysius J Klingelhutz, Wilmara Salgado-Pabón, Patrick M Schlievert
Staphylococcus aureus causes many infections, such as skin and soft tissue, pneumonia, osteomyelitis, and infective endocarditis (IE). IE is an endovascular infection of native and prosthetic valves and the lining of the heart; it is characterized by the formation of cauliflower-like "vegetations" composed of fibrin, platelets, other host factors, bacteria, and bacterial products. β-Toxin is an S. aureus virulence factor that contributes to the microorganism's ability to cause IE. This cytolysin has two enzymatic activities: sphingomyelinase (SMase) and biofilm ligase...
March 21, 2017: MBio
https://www.readbyqxmd.com/read/28290975/death-of-military-working-dogs-due-to-bartonella-vinsonii-subspecies-berkhoffii-genotype-iii-endocarditis-and-myocarditis
#12
Leslie M Shelnutt, Nandhakumar Balakrishnan, Justin DeVanna, Kenneth L Batey, Edward B Breitschwerdt
OBJECTIVES: As a result of extensive field-related activities, military working dogs (MWDs) have an increased occupational risk for acquiring vector-borne infectious diseases. METHODS: Indirect fluorescent antibody, Bartonella alpha-proteobacteria growth medium enrichment culture, and 16-23S Bartonella intergenic transcribed spacer polymerase chain reaction were performed using blood, serum, or tissue specimens. RESULTS: Endocarditis was diagnosed in three MWDs infected with Bartonella vinsonii subspecies (subsp...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28283187/successful-delayed-coiling-of-a-ruptured-growing-distal-posterior-cerebral-artery-mycotic-aneurysm
#13
C Champeaux, N Walker, J Derwin, A Grivas
Intracranial infectious aneurysm (IIA) is a rare form of cerebrovascular malformation for which obliteration may be undertaken after rupture or non-response to targeted antibiotic therapy. We discuss the case of a 19-year-old man who presented with acute neurologic decline (Glasgow Coma Scale of 8) and endocarditis. CT images demonstrated subarachnoid haemorrhage, hydrocephalus and a mycotic aneurysm on the left posterior cerebral artery. Conservative management was initially decided due to the high risk of stroke and hemianopia...
March 7, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28279491/proposal-for-shorter-antibiotic-therapies
#14
C Wintenberger, B Guery, E Bonnet, B Castan, R Cohen, S Diamantis, P Lesprit, L Maulin, Y Péan, E Peju, L Piroth, J P Stahl, C Strady, E Varon, F Vuotto, R Gauzit
OBJECTIVES: Reducing antibiotic consumption has now become a major public health priority. Reducing treatment duration is one of the means to achieve this objective. Guidelines on the therapeutic management of the most frequent infections recommend ranges of treatment duration in the ratio of one to two. The Recommendation Group of the French Infectious Diseases Society (SPILF) was asked to collect literature data to then recommend the shortest treatment durations possible for various infections...
March 6, 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/28264856/effect-of-continuous-and-sequential-therapy-among-veterans-receiving-daptomycin-or-linezolid-for-vancomycin-resistant-enterococcus-faecium-bacteremia
#15
Nicholas S Britt, Emily M Potter, Nimish Patel, Molly E Steed
Vancomycin-resistant Enterococcus faecium bloodstream infections (VREF-BSI) cause significant mortality, highlighting the need to optimize treatment. We compared the effectiveness and safety of daptomycin (DAP) and linezolid (LZD) as continuous or sequential therapy for VREF-BSI in a national, retrospective, propensity score (PS) matched cohort study of hospitalized Veterans Affairs patients (2004-2014). We compared clinical outcomes and adverse events among patients treated with continuous LZD, continuous DAP, or sequential LZD followed by DAP (LZD-DAP)...
March 6, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28259839/fatal-fungal-endocarditis-by-aspergillus-udagawae-an-emerging-cause-of-invasive-aspergillosis
#16
Atsuko Seki, Atsushi Yoshida, Yoko Matsuda, Mitsuhiro Kawata, Takashi Nishimura, Jun Tanaka, Yoshiki Misawa, Yuta Nakano, Ryoko Asami, Koji Chida, Ken Kikuchi, Tomio Arai
Aspergillus udagawae has morphological similarities to Aspergillusfumigatus; however, it shows a low susceptibility to common antifungal drugs and poor in vitro sporulation. We present the first reported case of infectious endocarditis caused by A. udagawae. An awareness of this newly described Aspergillus species is vital for further clarification.
February 8, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28253945/-pyogenic-spinal-infections-in-adults-a-5-year-experience-from-a-tertiary-care-centre
#17
O Džupová, R Cihlářová
PURPOSE OF THE STUDY To describe epidemiological and clinical features of pyogenic spinal infections in patients treated at the Department of Infectious, Parasitic and Tropical Diseases of the Hospital Na Bulovce in 2010-2014, and to analyse a predictive significance of selected variables. MATERIAL AND METHODS A single-centre retrospective cohort study carried out from 1.1.2010 to 31.12.2014 enrolled adult patients with septic spondylitis, discitis and facet joint infections. Recorded parameters included: demographics, chronic comorbidities, time to diagnosis, radiological work-up, anatomical level of spinal infection, source of infection, etiological agent, complications, treatment and outcomes...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28250859/-18-f-fdg-pet-ct-for-the-diagnosis-of-malignant-and-infectious-complications-after-solid-organ-transplantation
#18
Nastassja Muller, Romain Kessler, Sophie Caillard, Eric Epailly, Fabrice Hubelé, Céline Heimburger, Izzie-Jacques Namer, Raoul Herbrecht, Cyrille Blondet, Alessio Imperiale
PURPOSE: Infection and malignancy represent two common complications after solid organ transplantation, which are often characterized by poorly specific clinical symptomatology. Herein, we have evaluated the role of (18)F-fluoro-2-deoxy-D-glucose (FDG) positron emission tomography/computed tomography (PET/CT) in this clinical setting. METHODS: Fifty-eight consecutive patients who underwent FDG PET/CT after kidney, lung or heart transplantation were included in this retrospective analysis...
March 2017: Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28246364/elevated-cholesterol-in-the-coxiella-burnetii-intracellular-niche-is-bacteriolytic
#19
Minal Mulye, Dhritiman Samanta, Seth Winfree, Robert A Heinzen, Stacey D Gilk
Coxiella burnetii is an intracellular bacterial pathogen and a significant cause of culture-negative endocarditis in the United States. Upon infection, the nascent Coxiella phagosome fuses with the host endocytic pathway to form a large lysosome-like vacuole called the parasitophorous vacuole (PV). The PV membrane is rich in sterols, and drugs perturbing host cell cholesterol homeostasis inhibit PV formation and bacterial growth. Using cholesterol supplementation of a cholesterol-free cell model system, we found smaller PVs and reduced Coxiella growth as cellular cholesterol concentration increased...
February 28, 2017: MBio
https://www.readbyqxmd.com/read/28223392/streptococcus-mitis-and-s-oralis-lack-a-requirement-for-cdsa-the-enzyme-required-for-synthesis-of-major-membrane-phospholipids-in-bacteria
#20
Hannah M Adams, Luke R Joyce, Ziqiang Guan, Ronda L Akins, Kelli L Palmer
Synthesis and integrity of the cytoplasmic membrane is fundamental to cellular life. Experimental evolution studies have hinted at unique physiology in the Gram-positive bacteria Streptococcus mitis and S. oralis These organisms commonly cause bacteremia and infectious endocarditis (IE) but are rarely investigated in mechanistic studies of physiology and evolution. Unlike other Gram-positive pathogens, high-level (MIC ≥ 256 μg/mL) daptomycin resistance rapidly emerges in S. mitis and S. oralis after a single drug exposure...
February 21, 2017: Antimicrobial Agents and Chemotherapy
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