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Clinical microbiology

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https://www.readbyqxmd.com/read/27932112/short-term-outcome-of-untreated-versus-treated-asymptomatic-bacteriuria-in-renal-transplant-patients
#1
N Arencibia, M L Agüera, C Rodelo, I López, M Sánchez-Agesta, A Hurtarte, M D Navarro, A Rodríguez-Benot
BACKGROUND: Infection of the urinary tract (UTI) is the most common form of bacterial infection in renal transplant patients, but its management is still controversial. We compared symptomatic and asymptomatic bacteriuria, treated or untreated, during two different months (summer or winter). METHODS: This longitudinal, prospective study involved routine urine cultures collected during September 2014 or March 2015. Demographic, clinical, and microbiological characteristics from the patients with positive urine cultures were described...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27931685/evaluation-of-different-laboratory-methods-for-rapid-diagnosis-of-tuberculous-pleurisy
#2
Safaa Amer, Azza El Hefnawy, Nashwa Abdel Wahab, Hadir Okasha, Amira Baz
BACKGROUND/OBJECTIVE: Tuberculous pleurisy is a diagnostic challenge due to its nonspecific clinical presentation, paucibacillary nature of the effusion together with the inefficiency of conventional laboratory methods motivating the evaluation of variable diagnostic strategies. METHODS: Using thoracoscopy, the pleural cavity of 50 patients with undiagnosed exudative pleural effusion were fully examined and biopsy specimens of affected parietal pleura were taken under direct vision...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27930590/low-mortality-but-increasing-incidence-of-staphylococcus-aureus-endocarditis-in-people-who-inject-drugs-experience-from-a-swedish-referral-hospital
#3
Hilmir Asgeirsson, Anders Thalme, Ola Weiland
Staphylococcus aureus is a leading cause of infective endocarditis in people who inject drugs (PWID). The management of S aureus endocarditis (SAE) in PWID can be problematic. The objective of this retrospective observational study was to assess the epidemiology, clinical characteristics, and mortality of S aureus endocarditis (SAE) in PWID in Stockholm, Sweden.The Department of Infectious Diseases at the Karolinska University Hospital serves as a regional referral center for drug users with severe infections...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27929354/differences-in-mrsa-prevalence-and-resistance-patterns-in-a-tertiary-center-before-and-after-joining-an-international-program-for-surveillance-of-antimicrobial-resistance
#4
Olivera Djuric, Snezana Jovanovic, Branka Stosovic, Tanja Tosic, Milica Jovanovic, Naomi Nartey, Jovana Todorovic, Ljiljana Markovic-Denic
Methicillin-resistant Staphylococcus aureus (MRSA) emerged as one of the most important causes of hospital-acquired bloodstream infections (BSIs), especially the multidrug resistant clones. The aim of the present study was to compare prevalence and resistance patterns of MRSA bacteremia in the major tertiary-care academic and referral center in Serbia before and after implementing an active antimicrobial resistance (AMR) surveillance. Laboratory-based before-after study was conducted during a two-year period (January 2012 to December 2013) in Clinical Centre of Serbia...
December 8, 2016: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/27928111/treatment-outcomes-of-patients-treated-for-pulmonary-tuberculosis-after-undergoing-gastrectomy
#5
In Young Jung, Moo Hyun Kim, Woo Yong Jeong, Mi Young Ahn, Yong Duk Jeon, Hea Won Ahn, Jin Young Ahn, Je Eun Song, Dong Hyun Oh, Yong Chan Kim, Eun Jin Kim, Su Jin Jeong, Nam Su Ku, June Myung Kim, Jun Yong Choi
Gastrectomy is a proxy of malnutrition, which may lead to increased risk for developing pulmonary tuberculosis (TB). Malabsorption in gastrectomy patients could lead to low serum levels of rifampicin, which may be related to higher treatment failure. However, there is limited information on treatment outcomes of TB in patients who have undergone gastrectomy. This study aims to determine treatment outcomes and adverse effects in patients treated for TB after undergoing gastrectomy for gastric cancer. During the study period, 112 patients were treated for active TB that developed after gastrectomy for gastric cancer...
2016: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27927926/clinical-and-microbiological-aspects-of-%C3%AE-lactam-resistance-in-staphylococcus-lugdunensis
#6
Ian H McHardy, Jennifer Veltman, Janet Hindler, Katia Bruxvoort, Marissa M Carvalho, Romney M Humphries
Antimicrobial susceptibility results from broth microdilution MIC testing of 993 S. lugdunensis isolates recovered from patients at a tertiary care medical center from 2008-2015 were reviewed. Ninety-two oxacillin-susceptible isolates were selected to assess the accuracy of penicillin MIC, penicillin disk diffusion and three β-lactamase tests, including the cefoxitin-induced nitrocefin test, penicillin cloverleaf assay and penicillin disk zone-edge test. Results of all phenotypic tests were compared to blaZ PCR...
December 7, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27927920/validation-of-autoclave-protocols-for-the-successful-decontamination-of-category-a-medical-waste-generated-from-the-care-of-patients-with-serious-communicable-diseases
#7
Brian T Garibaldi, Mallory Reimers, Neysa Ernst, Gregory Bova, Elaine Nowakowski, James Bukowski, Brandon C Ellis, Chris Smith, Lauren Sauer, Kim Dionne, Karen C Carroll, Lisa L Maragakis, Nicole M Parrish
In response to the Ebola outbreak in 2014, many hospitals designated specific areas to care for patients with Ebola and other highly infectious diseases. The safe handling of Category A infectious substances is a unique challenge in this environment. One solution is onsite waste treatment with a steam sterilizer or autoclave. The Johns Hopkins Hospital (JHH) installed two pass-through autoclaves in its Biocontainment Unit (BCU). The JHH BCU and The Johns Hopkins Biosafety Level 3 Clinical Microbiology Laboratory designed and validated waste handling protocols with simulated patient trash to ensure adequate sterilization...
December 7, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27927870/insidious-risk-of-severe-mycobacterium-chimaera-infection-in-cardiac-surgery-patients
#8
Meera Chand, Theresa Lamagni, Katharina Kranzer, Jessica Hedge, Ginny Moore, Simon Parks, Samuel Collins, Carlos Del Ojo Elias, Nada Ahmed, Tim Brown, E Grace Smith, Peter Hoffman, Peter Kirwan, Brendan Mason, Alison Smith-Palmer, Philip Veal, Maeve K Lalor, Allan Bennett, James Walker, Alicia Yeap, Antonio Isidro Carrion Martin, Gayle Dolan, Sonia Bhatt, Andrew Skingsley, André Charlett, David Pearce, Katherine Russell, Simon Kendall, Andrew A Klein, Stephen Robins, Silke Schelenz, William Newsholme, Stephanie Thomas, Tim Collyns, Eleri Davies, Jim McMenamin, Lorraine Doherty, Tim Ea Peto, Derrick Crook, Maria Zambon, Nick Phin
BACKGROUND: An urgent UK investigation was launched to assess risk of invasive Mycobacterium chimaera infection in cardiothoracic surgery and a possible association with cardiopulmonary bypass heater-cooler units following alerts in Switzerland and the Netherlands. METHODS: Parallel investigations were pursued: i) identification of cardiopulmonary bypass-associated M. chimaera infection through national laboratory and hospital admissions data linkage ii) cohort study to assess patient risk iii) microbiological and aerobiological investigations of heater-coolers in situ and under controlled laboratory conditions iv) whole genome sequencing of clinical and environmental isolates...
December 7, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/27922772/sarcina-ventriculi-review-of-the-literature
#9
Mohamed Rizwan Haroon Al Rasheed, Carmencita G Senseng
Sarcina ventriculi is an increasingly common gram-positive coccus, recognized in gastric biopsies, particularly of patients with delayed gastric emptying. It occurs most commonly in adult women and can be identified easily by its characteristic morphologic features, such as basophilic staining, cuboid shape, tetrad arrangement, red blood cell-sized packets, flattened cell walls, and refractile nature on light microscopy. Although the pathogenesis of the organism is debated, it has been implicated in cases of gastric perforation, emphysematous gastritis, and peritonitis as well as occurring in the background of gastric adenocarcinomas...
December 2016: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/27922236/microorganisms-isolated-from-cultures-and-infection-focus-and-antibiotic-treatments-in-febrile-neutropenic-children-from-%C3%A5-anl%C3%A4-urfa-turkey
#10
Z Canan Özdemir, Ahmet Koç, Ali Ayçiçek
Chemotherapy induced febrile neutropenia predisposes patients to life threatening infections. We aimed to determine the causative microorganisms, infection focus and antibiotic treatment success in febrile neutropenic children with leukemia. A total of 136 febrile neutropenic episodes in 48 leukemic children were reviewed retrospectively from records. Among 136 febrile neutropenic episodes, 68 (50%) episodes were microbiologically documented. Methicillin sensitive coagulase (-) Staphylococcus aureus were the most common isolates from hemoculture (20...
2016: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/27921389/superiority-of-sds-lysis-over-saponin-lysis-for-direct-bacterial-identification-from-positive-blood-culture-bottle-by-maldi-tof-ms
#11
Yvan Caspar, Cécile Garnaud, Mariya Raykova, Sébastien Bailly, Marie Bidart, Danièle Maubon
PURPOSE: Fast species diagnosis has an important health care impact, as rapid and specific antibacterial therapy is of clear benefit for patient's outcome. Here we propose a new protocol for species identification directly from positive blood cultures. EXPERIMENTAL DESIGN: We compared four in-house protocols for bacterial identification by mass spectrometry directly from clinical positive blood cultures evaluating 2 lytic agents, SDS and saponin, and 2 protein extraction schemes, fast (FP) and long (LP)...
December 6, 2016: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/27920489/bleb-related-infections-clinical-characteristics-risk-factors-and-outcomes-in-an-asian-population
#12
Zhu Li Yap, You Chuen Chin, Judy Yu-Fen Ku, Tat Keong Chan, Gillian Teh, Monisha Esther Nongpiur, Tin Aung, Shamira A Perera
PURPOSE: Comparison of the demographic, ocular, systemic and microbiological characteristics of eyes with bleb related infection (BRI) and bleb related endophthalmitis (BRE). METHODS: Retrospective chart review of patients with BRI from January 1996-July 2013. Identification done via the center's longstanding endophthalmitis audit, BRI audit and laboratory database identifying all conjunctival swabs from blebs. Blebitis was defined as anterior segment inflammation with mucopurulent material in or around the bleb, with anterior chamber cells but no hypopyon...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27918382/conventional-versus-prolonged-infusion-of-meropenem-in-neonates-with-gram-negative-late-onset-sepsis-a-randomized-controlled-trial
#13
Abd Elazeez Shabaan, Islam Nour, Heba Elsayed Eldegla, Nehad Nasef, Basma Shouman, Hesham Abdel-Hady
BACKGROUND: Gram-negative bacteria are associated with significant morbidity and mortality in preterm and term newborns. Meropenem has widespread efficacy and often allows for monotherapy in this group. Prolonged infusion instead of infusion over 30 minutes has been suggested to result in higher microbiologic efficacy. OBJECTIVE: To compare the clinical and microbiologic efficacy and safety of prolonged infusions versus conventional dosing of meropenem in neonates with Gram negative late onset sepsis (GN-LOS)...
November 30, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27918254/clinical-implications-of-mycobacterium-chimaera-detection-in-thermoregulatory-devices-used-for-extracorporeal-membrane-oxygenation-ecmo-germany-2015-to-2016
#14
Franziska C Trudzinski, Uwe Schlotthauer, Annegret Kamp, Kai Hennemann, Ralf M Muellenbach, Udo Reischl, Barbara Gärtner, Heinrike Wilkens, Robert Bals, Mathias Herrmann, Philipp M Lepper, Sören L Becker
Mycobacterium chimaera, a non-tuberculous mycobacterium, was recently identified as causative agent of deep-seated infections in patients who had previously undergone open-chest cardiac surgery. Outbreak investigations suggested an aerosol-borne pathogen transmission originating from water contained in heater-cooler units (HCUs) used during cardiac surgery. Similar thermoregulatory devices are used for extracorporeal membrane oxygenation (ECMO) and M. chimaera might also be detectable in ECMO treatment settings...
November 17, 2016: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/27917849/presence-and-resistance-of-streptococcus-agalactiae-in-vaginal-specimens-of-pregnant-and-adult-non-pregnant-women-and-association-with-other-aerobic-bacteria
#15
Fatima Numanović, Jasmina Smajlović, Merima Gegić, Zineta Delibegović, Sabaheta Bektaš, Emir Halilović, Jasmina Nurkić
Aim To determine the prevalence rate and resistance profile of Streptococcus agalactiae (S. agalactiae) in vaginal swabs of pregnant and adult non-pregnant women in the Tuzla region, Bosnia and Herzegovina (B&H), as well as its association with other aerobic bacteria. Methods This prospective study included 200 women, 100 pregnant and 100 adult non-pregnant. The research was conducted at the Institute of Microbiology, University Clinical Center Tuzla from October to December 2015. Standard aerobic microbiological techniques were used for isolation and identification of S...
February 1, 2017: Medicinski Glasnik
https://www.readbyqxmd.com/read/27917374/identification-and-characterization-of-staphylococcus-aureus-strains-with-an-incomplete-hemolytic-phenotype
#16
Haifang Zhang, Yi Zheng, Huasheng Gao, Ping Xu, Min Wang, Aiqing Li, Minhui Miao, Xiaofang Xie, Yimai Deng, Huiqin Zhou, Hong Du
Staphylococcus aureus is a common pathogen causing both hospital and community-acquired infections. Hemolysin is one of the important virulence factors for S. aureus and causes the typical β-hemolytic phenotype which is called complete hemolytic phenotype as well. Recently, S. aureus with an incomplete hemolytic phenotype (SIHP) was isolated from clinical samples. To study the microbiologic characteristics of SIHP, the special hemolytic phenotype of SIHP was verified on the sheep blood agar plates supplied by different manufacturers...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/27916290/time-to-positivity-of-blood-cultures-in-patients-with-bloodstream-infections-a-useful-prognostic-tool
#17
Guillermo Martín-Gutiérrez, Carlos Martín-Pérez, Antonio Gutiérrez-Pizarraya, José A Lepe, José M Cisneros, Javier Aznar
OBJECTIVE: The time to positivity (TTP) of blood cultures in patients with bloodstream infections (BSIs) has been considered to be a possible prognostic tool for some bacterial species. However, notable differences have been found between sampling designs and statistical methods in published studies to date, which makes it difficult to compare results or to derive reliable conclusions. Our objective was to evaluate the clinical and microbiological implications of TTP among patients with BSI caused by the most common pathogens...
December 1, 2016: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/27914649/nosocomial-outbreak-of-extensively-drug-resistant-pseudomonas-aeruginosa-associated-with-aromatherapy
#18
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
#19
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/27910709/management-of-infections-associated-with-neurosurgical-implanted-devices
#20
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
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