Time filter

Source Type

Arendrup M.C.,Statens Serum Institute | Cuenca-Estrella M.,National Center for Microbiology | Lass-Florl C.,Innsbruck Medical University | Hope W.W.,University of Liverpool
Mycoses | Year: 2014

The European Committee on Antimicrobial Susceptibility Testing Subcommittee on Antifungal Susceptibility Testing has determined breakpoints for micafungin and revised breakpoints for anidulafungin and fluconazole for Candida spp. This Technical Note is based on the corresponding rationale documents (http://www.eucast.org). The micafungin breakpoints are based on PK data, animal PK/PD data, microbiological data and clinical experience. The anidulafungin breakpoints for C. parapsilosis and fluconazole breakpoints for C. glabrata have been modified to species-specific values that categorise the wild-type as intermediate to accommodate use of these compounds in some clinical situations. © 2014 Blackwell Verlag GmbH. Source

Munoz-Almagro C.,University of Barcelona | Gala S.,Hospital Universitari Sant Joan Of Deu | Selva L.,University of Barcelona | Jordan I.,Hospital Universitari Sant Joan Of Deu | And 2 more authors.
European Journal of Clinical Microbiology and Infectious Diseases | Year: 2011

The purpose of this investigation was to evaluate a rapid quantitative real-time polymerase chain reaction (PCR) for the direct detection and quantification of pneumococcal DNA bacterial load (DBL) in patients with pneumonia and empyema. DBL and molecular serotype detection was determined by DNA quantification of the pneumolysin (ply) gene and an additional capsular gene by real-time PCR. Plasma or pleural fluid samples from children and adolescents with confirmed pneumococcal pneumonia were analyzed. DBL was correlated with clinical parameters and outcomes. One hundred and sixty-nine patients with pneumococcal pneumonia (145 empyema) had bacterial cultures and real-time PCR assays performed. Among them, 41 (24.3%) had positive results for both, 4 (2.4%) had positive culture alone, and 124 (73.3%) had positive real-time PCR alone. The pleural fluid DBL was lower in patients with prior antibiotics (p = 0.01) and higher in patients with positive culture (p < 0.001). The pleural fluid DBL was positively correlated with serum C-reactive protein (p = 0.009), pleural fluid neutrophils (p < 0.001), and pleural fluid glucose (p < 0.001). The plasma and pleural fluid DBL were higher in patients with ≥8 days of hospital stay (p = 0.002), and the pleural fluid DBL was positively correlated with the number of hours of pleural drainage (p < 0.001). Quantification of pneumococcal DBL by real-time PCR may be helpful for the diagnosis and clinical management of pediatric patients with pneumonia and empyema © 2010 Springer-Verlag. Source

Ledesma J.,National Center for Microbiology | Bouza E.,Hospital General Universitario Gregorio Maranon | Bouza E.,Institute Investigacion Sanitaria Gregorio Maranon | Bouza E.,CIBER ISCIII | And 8 more authors.
Journal of Medical Virology | Year: 2013

BK polyomavirus (BKV) is classified into four subtypes based on nucleotide variation of a 287bp typing region in the VP1 protein. Most studies show that subtype I is predominant in different geographic settings, followed by subtype IV. However, BKV subtypes II and III are detected at low rates. In Spain, the prevalence of each subtype is not well known. The aim of this study was to identify the BKV subtypes from a selection of different types of patients and to determine whether different subtypes could be infecting the same patient. A hundred and twenty nine BKV-positive urine samples were selected to amplify and sequence the typing region. Plasma specimens collected at the same time as the urine samples were also studied in 34 patients. A phylogenetic analysis and a study of substitutions in the VP1 protein were carried out with the sequences obtained. Subtype I was the predominant subtype detected in urine (61.2%) and plasma (38.2%) samples followed by subtype II. The analysis of paired samples showed that the subtype found in urine was different from that found in plasma in 10 patients. Fourteen BKV variants based on substitutions in VP1 were identified. The finding of compartmentalized infections involving different subtypes at different sites in some patients might mean specific and different selective pressure in each tissue. The potential involvement in the viral cycle of the different BKV variants found should be analyzed. © 2013 Wiley Periodicals, Inc. Source

Morosini M.I.,Ramon y Cajal University Hospital | Quereda C.,Ramon y Cajal University Hospital | Gil H.,National Center for Microbiology | Anda P.,National Center for Microbiology | And 3 more authors.
Emerging Infectious Diseases | Year: 2013

The worldwide epidemiology of melioidosis is changing. We describe a case of acute melioidosis in Spain in a patient who had traveled to Africa. A novel sequence type of Burkholderia pseudomallei was identified in this patient. Clinicians should be aware of the possibility of melioidosis in travelers returning from melioidosis-nonendemic regions. Source

Rolo D.,University of Barcelona | Rolo D.,CIBER ISCIII | Fenoll A.,National Center for Microbiology | Ardanuy C.,University of Barcelona | And 9 more authors.
Journal of Antimicrobial Chemotherapy | Year: 2011

Objectives: To analyse the epidemiology of isolates of serotype 6C among invasive pneumococci isolated from children and adults in Spain between 1997 and 2009, and to characterize serotype 6C clones and macrolide and quinolone resistance mechanisms. Methods: Antimicrobial susceptibility was determined following CLSI guidelines. Phenotypic characterization of macrolide-resistant isolates was performed by the double disc diffusion method. Genes associated with resistance to erythromycin and tetracycline were sought by PCR, while quinolone resistance was analysed by restriction fragment length polymorphism of the quinolone resistance-determining region. Isolates were typed by multilocus sequence typing. Results: Seven hundred and eighty-nine of 866 serotype 6A pneumococci collected from 1997 to 2009 were available. Of these, 213 (27.0%) were serotype 6C; 16/163 (9.8%) in the 1997-2001 (pre-PCV7) period, 37/322 (11.5%) in the 2002-05 (early-PCV7) period and 160/381 (42.0%) in the 2006-09 (late-PCV7) period. The overall proportions of serotype 6C increased from 0.1% (pre-PCV7) to 1% (late-PCV7) for paediatric isolates and from 0.3% to 1.7% among adult isolates. A major serotype 6C lineage (ST224/ST1150/ST4821), accounting for 66.7% of the isolates, was identified across the whole period. In the late-PCV7 period the antimicrobial non-susceptibility of serotype 6C increased in association with the emergence of the ST386/ST4310/ST4825 lineage, which carried a Tn6002 transposon [erm(B) and tet(M) genes]. Conclusions: Serotype 6C pneumococci were identified in Spain during the period 1997-2009. The increase in serotype 6C in the late-PCV7 period was associated with the spread of the ST224/ST1150/ST4821 lineage and the emergence of the ST386/ST4310/ST4825 lineage. © The Author 2011. Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy. All rights reserved. Source

Discover hidden collaborations