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Microbiology

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https://www.readbyqxmd.com/read/27914649/nosocomial-outbreak-of-extensively-drug-resistant-pseudomonas-aeruginosa-associated-with-aromatherapy
#1
Astrid Mayr, Guido Hinterberger, Ingo H Lorenz, Peter Kreidl, Wolfgang Mutschlechner, Cornelia Lass-Flörl
An increase of extensively drug-resistant Pseudomonas aeruginosa (XDR-PA) in various clinical specimens among intensive care unit patients (n = 7) initiated an outbreak investigation consisting of patient data analyses, control of adherence to infection control guidelines, microbiologic surveys, and molecular-based studies. XDR-PA was detected in a jointly used aroma-oil nursing bottle for aromatherapy. We implemented the restriction of oil sharing among patients. Hence, the outbreak was controlled successfully...
November 30, 2016: American Journal of Infection Control
https://www.readbyqxmd.com/read/27914127/impact-of-initial-vancomycin-trough-concentration-on-clinical-and-microbiological-outcomes-of-methicillin-resistant-staphylococcus-aureus-bacteremia-in-children
#2
Ree Nar Yoo, Seo Hee Kim, Jina Lee
It is important to use vancomycin in a proper manner to ensure optimal drug exposure. Despite extensive use of vancomycin in children, studies on its optimal trough concentration (Ctrough) in the pediatric population remained rare. This retrospective study included children < 18 years old with culture-confirmed methicillin-resistant Staphylococcus aureus (MRSA) bacteremia who were hospitalized in our institute from January 2010 to April 2014. Clinical characteristics, initial vancomycin dose, Ctrough and clinical/microbiological outcomes were retrospectively collected from medical records...
January 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/27914021/surface-modified-cobalt-ferrite-nanoparticles-for-rapid-capture-detection-and-removal-of-pathogens-a-potential-material-for-water-purification
#3
Raghvendra A Bohara, Nanasaheb D Throat, Nayeem A Mulla, Shivaji H Pawar
Enteric infections resulting from the consumption of contaminated drinking water, inadequate supply of water for personal hygiene, and poor sanitation take a heavy toll worldwide, and developing countries are the major sufferers. Consumption of microbiologically contaminated water leads to diseases such as amoebiasis, cholera, shigellosis, typhoid, and viral infections leading to gastroenteritis and hepatitis B. The present investigation deals with the development of effective method to capture and eliminate microbial contamination of water and improve the quality of water and thus decreasing the contaminated waterborne infections...
December 2, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27913978/case-series-study-of-invasive-pulmonary-aspergillosis
#4
Ana I Aller-García, Carmen Castro-Méndez, Ana Alastruey-Izquierdo, Elena M Marín-Martínez, Ismail Zakariya-Yousef Breval, Carmen Couto-Caro, Juan C López-Marín, Nicolás Peña-Griñán, Maite Ruiz de Pipaon, Ana M Romero-Mejías, Estrella Martín-Mazuelos
Diagnosis of invasive pulmonary aspergillosis (IPA) is challenging. The objective of the study was to assess the value of microbiological tests to the diagnosis of IPA in the absence of non-specific radiological data. A retrospective study of 23 patients with suspicion of IPA and positivity of some microbiological diagnostic tests was performed. These tests included conventional microbiological culture, detection of Aspergillus galactomannan (GM) antigen and in some patients (1 → 3)-β-D-glucan (BDG) and Aspergillus fumigatus DNA using the LightCycler(®) SeptiFast test...
December 2, 2016: Mycopathologia
https://www.readbyqxmd.com/read/27913415/a-highly-expressed-high-molecular-weight-s-layer-complex-of-pelosinus-strain-ufo1-binds-uranium
#5
Michael P Thorgersen, W Andrew Lancaster, Lara Rajeev, Xiaoxuan Ge, Brian J Vaccaro, Farris L Poole, Adam P Arkin, Aindrila Mukhopadhyay, Michael W W Adams
: Cells suspensions of Pelosinus sp. strain UFO1 were previously shown, using spectroscopic analysis, to sequester uranium as U(IV) complexed with carboxyl and phosphoryl ligands on protein(s). The goal of this project was to characterize the proteins involved in uranium binding. Virtually all of the uranium in UFO1 cells was associated with a heterodimeric protein, which was termed the uranium-binding complex (UBC). UBC was composed of two S-layer domain proteins encoded by UFO1_4202 and UFO1_4203...
December 2, 2016: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27913414/distinct-anaerobic-bacterial-consumers-of-cellobiose-derived-carbon-in-boreal-fens-differing-in-ch4-vs-co2-production-ratio
#6
Heli Juottonen, Alexander Eiler, Christina Biasi, Eeva-Stiina Tuittila, Kim Yrjälä, Hannu Fritze
: Northern peatlands in general have high methane (CH4) emissions, but individual peatlands show considerable variation as CH4 sources. Particularly in nutrient poor peatlands, CH4 production can be low and exceeded by carbon dioxide (CO2) production from unresolved anaerobic processes. To clarify the role anaerobic bacterial degraders play in this variation, we compared consumers of cellobiose-derived carbon in two fens differing in nutrient status and the ratio of CH4 and CO2 produced...
December 2, 2016: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27913070/basagran-%C3%A2-induces-developmental-malformations-and-changes-the-bacterial-community-of-zebrafish-embryos
#7
Jacinta M M Oliveira, Victor Galhano, Isabel Henriques, Amadeu M V M Soares, Susana Loureiro
This study aimed to assess the effects of Basagran(®) on zebrafish (Danio rerio) embryos. The embryos were exposed to Basagran(®) at concentrations ranging from 120.0 to 480.6 mg/L, and the effects on embryo development (up to 96 h) and bacterial communities of 96 h-larvae were assessed. The embryo development response was time-dependent and concentration-dependent (106.35 < EC50 < 421.58 mg/L). The sensitivity of embryo-related endpoints decreased as follows: blood clotting in the head and/or around the yolk sac > delay or anomaly in yolk sac absorption > change in swimming equilibrium > development of pericardial and/or yolk sac oedema > scoliosis...
November 29, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27912981/examining-the-association-between-surface-bioburden-and-frequently-touched-sites-in-intensive-care
#8
C E Adams, J Smith, V Watson, C Robertson, S J Dancer
BACKGROUND: Critical care patients are at increased risk of infection. Near-patient surfaces act as reservoirs of microbial soil, which may contain pathogens. AIM: To correlate soil levels with hand-touch frequency of near-patient sites in an intensive care unit (ICU). METHODS: Five sites around each bed in a 10-bed ICU were screened for total microbial soil (cfu/cm(2)) and Staphylococcus aureus every month for 10 months. Selected sites were infusion pump and cardiac monitor, left and right bedrails, and bed table...
November 13, 2016: Journal of Hospital Infection
https://www.readbyqxmd.com/read/27912812/endodontic-microbiology-and-pathobiology-current-state-of-knowledge
#9
REVIEW
Ashraf F Fouad
Newer research tools and basic science knowledge base have allowed the exploration of endodontic diseases in the pulp and periapical tissues in novel ways. The use of next generation sequencing, bioinformatics analyses, genome-wide association studies, to name just a few of these innovations, has allowed the identification of hundreds of microorganisms and of host response factors. This review addresses recent advances in endodontic microbiology and the host response and discusses the potential for future innovations in this area...
January 2017: Dental Clinics of North America
https://www.readbyqxmd.com/read/27912759/intestinal-dysbiosis-and-allogeneic-hematopoietic-progenitor-cell-transplantation
#10
REVIEW
Vikram M Raghunathan, Iris Sheng, Seah H Lim
The intestinal microbiota is a diverse and dynamic ecosystem that is increasingly understood to play a vital role in human health. Hematopoietic stem cell transplant recipients undergo prolonged exposure to antimicrobials, chemotherapeutic agents, and immunosuppressants, resulting in profound shifts in the gut microbiome. A growing body of research has revealed the ways in which these microbiologic shifts shape immune modulation, affecting susceptibility to infections and graft-versus-host disease, the two major post-transplant complications in this population...
December 3, 2016: Journal of Translational Medicine
https://www.readbyqxmd.com/read/27910709/management-of-infections-associated-with-neurosurgical-implanted-devices
#11
Anna Conen, Christoph A Fux, Peter Vajkoczy, Andrej Trampuz
Neurosurgical devices are increasingly used. With it, neurosurgical device-related infections gain relevance. As biofilms are involved in implant-associated infections the diagnosis and treatment is challenging and requires specific anti-biofilm concepts and management algorithms. Areas covered: The literature concerning the management of neurosurgical device-associated infections is scarce and heterogeneous treatment concepts are discussed, but no standardized diagnostic and treatment procedures exist. Therefore, we emphasize extrapolating management strategies predominantly from orthopedic device-associated infections, where the concept is better established and clinically validated...
December 2, 2016: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/27910210/microbiological-evaluation-of-the-extension-wire-and-percutaneous-epidural-lead-anchor-site-following-a-2-stage-cut-down-spinal-cord-stimulator-procedure
#12
Abdul Ghaaliq Lalkhen, Mahindra Chincholkar, Jiten Patel
OBJECTIVES: There are concerns regarding bacterial colonization of the temporary extension leads and subsequent infection risk using the 2-stage cut-down approach in spinal cord stimulation (SCS). We sought to quantify the extent of bacterial colonization of the temporary extension wire and percutaneous epidural lead anchor site. MATERIALS AND METHODS: We conducted a cross-sectional observational study recruiting a pragmatic sample of 25 consecutive patients listed for a cut-down trial of SCS...
December 2, 2016: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/27910139/characterization-of-patients-with-chronic-pulmonary-aspergillosis-according-to-the-new-escmid-ers-ecmm-and-idsa-guidelines
#13
Helmut J F Salzer, Jan Heyckendorf, Barbara Kalsdorf, Thierry Rolling, Christoph Lange
Recently, the Infectious Diseases Society of America (IDSA) and the European Society for Clinical Microbiology and Infectious Diseases (ESCMID) in cooperation with the European Respiratory Society (ERS) and the European Confederation of Medical Mycology (ECMM) published guidelines for the diagnosis of chronic pulmonary aspergillosis (CPA). Both guidelines, however, carry significant differences. We retrospectively applied the diagnostic recommendations on a patient cohort of 71 previously diagnosed CPA patients in order to compare both guidelines...
December 1, 2016: Mycoses
https://www.readbyqxmd.com/read/27909894/antimicrobial-photodynamic-therapy-vs-local-minocycline-in-addition-to-non-surgical-therapy-of-deep-periodontal-pockets-a-controlled-randomized-clinical-trial
#14
Laura Tabenski, Daniel Moder, Fabian Cieplik, Frederike Schenke, Karl-Anton Hiller, Wolfgang Buchalla, Gottfried Schmalz, Michael Christgau
OBJECTIVES: To investigate the additional influence of either antimicrobial photodynamic therapy (aPDT; Helbo® Photodynamic Systems) or local application of minocycline microspheres (MC; Arestin, OraPharma) on clinical and microbiological healing results in deep periodontal pockets (PPD ≥6 mm) following non-surgical periodontal therapy (SRP). MATERIALS AND METHODS: Forty-five patients with chronic periodontitis were evaluated: test group aPDT + SRP (n = 15), positive control group MC + SRP (n = 15), and negative control group SRP-alone (n = 15)...
December 1, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27909425/thermodynamic-and-kinetic-response-of-microbial-reactions-to-high-co2
#15
Qusheng Jin, Matthew F Kirk
Geological carbon sequestration captures CO2 from industrial sources and stores the CO2 in subsurface reservoirs, a viable strategy for mitigating global climate change. In assessing the environmental impact of the strategy, a key question is how microbial reactions respond to the elevated CO2 concentration. This study uses biogeochemical modeling to explore the influence of CO2 on the thermodynamics and kinetics of common microbial reactions in subsurface environments, including syntrophic oxidation, iron reduction, sulfate reduction, and methanogenesis...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27909068/use-of-multiplex-pcr-to-rapidly-diagnose-febrile-patients-during-a-gastroenteritis-outbreak-among-ebola-virus-treatment-unit-workers
#16
Tom O Evans, T Fominyam, S W Matthews, M S Bailey, E J Hutley
Multiplex PCR can provide rapid diagnosis for patients presenting with an acute undifferentiated febrile illness. Such technology is useful in deployed settings, where access to conventional microbiological diagnosis is limited. It was used in Sierra Leone to guide management of febrile healthcare workers, in whom Ebola virus disease was a possible cause. In particular, it informed appropriate antibiotic treatment while minimising the risk to clinicians of exposure to the causative organism.
December 1, 2016: Journal of the Royal Army Medical Corps
https://www.readbyqxmd.com/read/27908577/the-use-of-predictive-models-to-optimize-risk-of-decisions
#17
József Baranyi, Nathália Buss da Silva
The purpose of this paper is to set up a mathematical framework that risk assessors and regulators could use to quantify the "riskiness" of a particular recommendation (choice/decision). The mathematical theory introduced here can be used for decision support systems. We point out that efficient use of predictive models in decision making for food microbiology needs to consider three major points: (1) the uncertainty and variability of the used information based on which the decision is to be made; (2) the validity of the predictive models aiding the assessor; and (3) the cost generated by the difference between the a-priory choice and the a-posteriori outcome...
October 15, 2016: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/27907971/-interpretation-of-bacterial-susceptibility-resistance-to-antibiotics
#18
Milan Kolář
Bacterial resistance may be defined from a microbiological, clinical and pharmacological perspective. Microbiological resistance refers to the presence of genetic information coding for the relevant mechanism of resistance of a bacterium to a particular antibiotic. In case of clinical interpretation, breakpoints are of key importance as their role is to distinguish bacterial pathogens in which successful therapy is highly probable from isolates with a high likelihood of failure. However, it is questionable whether this approach is suitable for all patients, particularly those receiving intensive care for life-threatening infections...
September 2016: Klinická Mikrobiologie a Infekc̆ní Lékar̆ství
https://www.readbyqxmd.com/read/27907940/ct-guided-percutaneous-spine-biopsy-in-suspected-infection-or-malignancy-a-study-of-214-patients
#19
J Rehm, S Veith, M Akbar, H U Kauczor, M A Weber
Purpose: To retrospectively determine the effectiveness and accuracy of CT-guided percutaneous biopsy of malignant and inflammatory bone lesions of the spine and to assess the reliability of pre-biopsy CT and MRI. Materials and Methods: 214 patients with lesions of the spine, which were suspicious either for being malignant or inflammatory, underwent CT-guided biopsy for pathological and/or microbiological detection. Biopsy samples were sent for histological examination in 128/214 patients, for microbiological analysis in 17/214 patients and for both analyses in 69/214 patients...
December 2016: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/27907197/clinical-experience-of-patients-receiving-doripenem-containing-regimens-for-the-treatment-of-healthcare-associated-infections
#20
Chien-Ming Chao, Chi-Chung Chen, Hui-Ling Huang, Yin-Ching Chuang, Chih-Cheng Lai, Hung-Jen Tang
In this study, we retrospectively reviewed the clinical experience of patients receiving doripenem-containing regimens for the treatment of healthcare-associated infections (HCAIs) in a tertiary care center and assessed the clinical usefulness of doripenem therapy in this clinical setting. In this retrospective study, the medical records of all adult patients who had ever received doripenem-containing therapy for the treatment of HCAIs were reviewed between September 1, 2012 and August 31, 2014, and the following data were extracted: age, gender, type of infection, disease severity, underlying comorbidities or conditions, and laboratory results...
2016: PloS One
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