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| Registros recuperados: 35 | |
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| Loth, Karine; Vergnes, Agnes; Barreto, Cairé; Voisin, Sébastien N; Meudal, Hervé; Da Silva, Jennifer; Bressan, Albert; Belmadi, Nawal; Bachère, Evelyne; Aucagne, Vincent; Cazevielle, Chantal; Marchandin, Hélène; Rosa, Rafael Diego; Bulet, Philippe; Touqui, Lhousseine; Delmas, Agnès F.; Destoumieux-garzón, Delphine. |
| Big defensins, ancestors of β-defensins, are composed of a β-defensin-like C-terminal domain and a globular hydrophobic ancestral N-terminal domain. This unique structure is found in a limited number of phylogenetically distant species, including mollusks, ancestral chelicerates, and early-branching cephalochordates, mostly living in marine environments. One puzzling evolutionary issue concerns the advantage for these species of having maintained a hydrophobic domain lost during evolution toward β-defensins. Using native ligation chemistry, we produced the oyster Crassostrea gigas BigDef1 (Cg-BigDef1) and its separate domains. Cg-BigDef1 showed salt-stable and broad-range bactericidal activity, including against multidrug-resistant human clinical isolates... |
| Tipo: Text |
Palavras-chave: MRSA; Antimicrobial peptides; Antimicrobial resistance; Defensins; Fibrils; Innate immunity; Mechanisms of action; Nuclear magnetic resonance. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00588/70057/68000.pdf |
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| GUSHIKEN,CAROLINA Y.; MEDEIROS,LILIANE B.; CORREIA,BRUNA P.; SOUZA,JOYCE M.; MORIS,DANIELA V.; PEREIRA,VALERIA C.; GIUFFRIDA,ROGERIO; RODRIGUES,MARCUS V.P.. |
| ABSTRACT Staphylococcus aureus can cause a variety of infections due to its high transmissibility, high pathogenic potential and resistance to multiple drugs, factors that contribute to the relevance of infections in healthcare services. The aim of this study was to document phenotypic and genotypic resistance factors of Staphylococcus aureus strains, isolated from nasal mucosa of medical students. A nasal swab was collected from the nares (nostrils) of 222 medical students. After collection, the samples were submitted to isolation and identification procedures. From 204 valid samples, 20.6% (42 samples) were positive for S. aureus. For the assessment of phenotypic resistance by disk-diffusion technique, from 42 samples, 95.2% showed resistance to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Multidrug resistance; Colonization; MLSB resistance; MRSA. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401501 |
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| Dias,N.L.; Silva,D.C.B.; Oliveira,D.C.B.S.; Fonseca Junior,A.A.; Sales,M.L.; Silva,N.. |
| Realizou-se a detecção do gene de Staphylococcus aureus, de enterotoxinas e de resistência à meticilina com extração de DNA feita diretamente de amostras de leite. Das 200 amostras estudadas, 145 (72,5%) amplificaram o gene femA, e estas foram analisadas quanto à presença dos genes sea, seb, sec e mecA. Os genes das enterotoxinas mais prevalentes foram: sea (60%), seb (37,9%) e sec (6,9%). Foram encontradas 18 amostras de leite (11,0 %) com S. aureus portadores do gene mecA. A detecção de S. aureus diretamente do leite, sem a necessidade de isolamento bacteriano e a caracterização do potencial enterotoxigênico, demonstra que a técnica de PCR é muito útil para estudos epidemiológicos das infecções estafilocócicas da glândula mamária. O alto percentual... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Staphylococcus aureus; Enterotoxinas; MRSA; PCR. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352011000600036 |
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| Idil,Neslihan; Bilkay,Isil Seyis. |
| Randomly amplified polymorphic DNA (RAPD)-PCR was applied with ten random 10-mer primers to examine the molecular diversity among methicillin resistant Staphylococcus aureus (MRSA) strains in the hospitals and to investigate the epidemiological spread of these strains between different hospitals. The main objective of the study was to identify appropriate primers, which successfully established the clonality of MRSA. Three of the primers yielded particularly discriminatory patterns and they were used to perform the RAPD analysis which revealed different bands ranging from 200 to 1500 bp. Dendogram was created by the un-weighted pair group method using arithmetic (UPGMA) average clustering and it was constructed based on the combination results of the new... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; RAPD-PCR; Clonal dissemination; UPGMA. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000400548 |
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| Zurita,Jeannete; Barba,Pedro; Ortega-Paredes,David; Mora,Marcelo; Rivadeneira,Sebastián. |
| ABSTRACT The spread of pandemic Staphylococcus aureus clones, mainly methicillin-resistant S. aureus (MRSA), must be kept under surveillance to assemble an accurate, local epidemiological analysis. In Ecuador, the prevalence of the USA300 Latin American variant clone (USA300-LV) is well known; however, there is little information about other circulating clones. The aim of this work was to identify the sequence types (ST) using a Multiple-Locus Variable number tandem repeat Analysis 14-locus genotyping approach. We analyzed 132 S. aureus strains that were recovered from 2005 to 2013 and isolated in several clinical settings in Quito, Ecuador. MRSA isolates composed 46.97% (62/132) of the study population. Within MRSA, 37 isolates were related to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; MSSA; Epidemic clones; MLVA typing. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000600525 |
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| Rocchetti,Taisa Trevizani; Martins,Katheryne Benini; Martins,Patricia Yoshida Faccioli; Oliveira,Rogério Antonio de; Mondelli,Alessandro Lia; Fortaleza,Carlos Magno Castelo Branco; Cunha,Maria de Lourdes Ribeiro de Souza da. |
| ABSTRACT Introduction: Staphylococcus spp. – both S. aureus, including methicillin-resistant strains (MRSA) and coagulase negative staphylococci (CoNS) – are relevant agents of healthcare-associated infections. Therefore, the rapid recognition of MRSA and methicillin-resistant CoNS from blood stream infections is critically important for patient management. It is worth noting that inappropriate empiric therapy has been associated with higher in-hospital mortality. Material and methods: In this study we evaluated a multiplex polymerase chain reaction (multiplex PCR) standardized to detect Staphylococcus spp., S. aureus, and mecA gene-encoded oxacillin resistance directly from blood culture bottles. A total of 371 blood cultures with Gram-positive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Staphylococcus spp.; Staphylococcus aureus; MRSA; MecA gene; Blood cultures; Multiplex PCR. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000200099 |
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| Niveditha,Nagasundaram; Sujatha,Sistla. |
| ABSTRACT INTRODUCTION: Appearance of isolated reports of resistance to anti-methicillin-resistantStaphylococcus aureus (MRSA) drugs is worrisome underscoring the need to continuously monitor the susceptibility of clinical MRSA isolates to these drugs. Hence, the present study is conducted to determine the susceptibility of MRSA isolates to various classes of anti-MRSA drugs such as vancomycin (glycopeptide), daptomycin (lipopeptide), tigecycline (glycylcycline), and linezolid (oxazolidinone) to determine the MIC50 and MIC90 values, and to observe MIC creep over a three year period, if any, with respect to these drugs. METHODS: A total of 200 isolates of MRSA obtained from clinical specimens were included. MIC was determined by E-test for anti-MRSA... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; VISA; MIC creep; Vancomycin. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702015000600585 |
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| Silveira,Alessandro Conrado de Oliveira; Cunha,Gabriela Rosa da; Caierão,Juliana; Cordova,Caio Mauricio Mendes de; d'Azevedo,Pedro Alves. |
| ABSTRACTTo determine the epidemiological and molecular characteristics of 12 Staphylococcus aureus isolates presenting heteroresistance to vancomycin in laboratories of two cities in Santa Catarina, southern Brazil. Epidemiological data, including the city of isolation, health institution, and date of isolation were considered, as well as the associated clinical specimen. For molecular characterization, we analyzed the staphylococcal cassette chromosome types, the erm gene presence, and the genomic diversity of isolates using pulsed-field gel electrophoresis. The 12 isolates of S. aureus were previously confirmed as heteroresistance to vancomycin using the population analysis profile-area under curve. Regarding genetic variability, two clones were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; Small colony variants; Antimicrobial resistance. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702015000500466 |
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| Ribeiro,Julival; Boyce,John M.; Zancanaro,Pedro Q.. |
| We surveyed patients seen at the emergency room at a tertiary hospital in Brazil from August to November 1997. All patients' (n = 600) anterior nares were cultured for MRSA; the results were confirmed by oxacillin disk diffusion methods and by detection of the mecA gene with PCR. Bacteria were found in 93.3% (560) of the patients and MRSA in 0.7% (n = 4). One patient had community-acquired MRSA. We concluded that MRSA is uncommon among patients visiting the emergency room. The presence of community-acquired MRSA can lead to serious medical and epidemiological issues, although initial clinical presentation may not differ from that of infections with other staphylococci. The empirical use of vancomycin for suspected community-acquired infections is seldom... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; Staphylococcus aureus; Emergency room; Brazil. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702005000100009 |
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| Cury,Gisele Gentile; Mobilon,Cristiane; Stehling,Eliana Guedes; Lancellotti,Marcelo; Ramos,Marcelo de Carvalho; Martinez,Roberto; Brocchi,Marcelo; Silveira,Wanderley Dias da. |
| One hundred and fifty-one methicillin-resistant z (MRSA) strains have been isolated from patients admitted in tertiary care hospitals in two metropolitan areas (Campinas City and Ribeirão Preto City) in the southeast region of Brazil and analyzed through PCR-based techniques [(PCR amplification of spa, coa, and housekeeping genes (arcC, aroE, gmk, pta, tpi, yqiL)] and further restriction fragment typing of coa and of housekeeping genes. The heterogeneity of spa gene was determined directly by agarose gel electrophoresis migration. The results obtained indicate the existence of three (A, B, C) main clusters. Since the strain distribution in these three clusters is much characteristic, it denotes the existence of three main clones. All strains isolated in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; Nosocomial; Molecular characterization; PCR. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702009000300002 |
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| Brites,Carlos; Silva,Nanci; Sampaio- Sá,Márcia. |
| Infections caused by methicillin-resistant Staphylococcus aureus (MRSA) have become an increasing problem in Brazilian hospitals within the last years. In Bahia, there is scarce information on the epidemiological characteristics of MRSA infections and their determinants. The objective of this study was to evaluate the temporal evolution of MRSA infections in a private, tertiary hospital, in Salvador, the capital of the state of Bahia. We reviewed the microbiological records of bacterial isolates from the Hospital Espanhol, a 300 bed, general hospital, in Salvador. We analyzed the frequency of positive cultures for S. aureus during the last nine years, the prevalence of MRSA, and the spatial distribution of the isolates in the hospital. We also evaluated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Staphylococcus aureus; MRSA; Bacterial resistance. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702006000400003 |
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| Nascimento,Thiago C.; Diniz,Cláudio G.; Silva,Vânia L.; Ferreira-Machado,Alessandra B.; Fajardo,Marina O.; de Oliveira,Tamara Lopes R.; Ferreira,Dennis de C.; Cavalcante,Fernanda S.; Santos,Kátia R. Netto dos. |
| ABSTRACT To characterize methicillin-resistant Staphylococcus aureus isolates from an intensive care unit of a tertiary-care teaching hospital, between 2005 and 2010. A total of 45 isolates were recovered from patients admitted to the intensive care unit in the study period. Resistance rates higher than 80% were found for clindamycin (100%), erythromycin (100%), levofloxacin (100%), azithromycin (97.7%), rifampin (88.8%), and gentamycin (86.6%). The SCCmec typing revealed that the isolates harbored the types III (66.7%), II (17.8%), IV (4.4%), and I (2.2%). Four (8.9%) isolates carried non-typeable cassettes. Most (66.7%) of the isolates were related to the Brazilian endemic clone from CC8/SCCmec III, which was prevalent (89.3%) between 2005 and 2007,... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Clonal complex; MRSA; PFGE lineages; SCCmec. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000100055 |
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| Moreira,Marina; Freitas,Marise R.; Martins,Sinaida T.; Castelo,Adauto; Medeiros,Eduardo Alexandrino Servolo. |
| Methicillin-resistant Staphylococcus aureus (MRSA) is endemic in most Brazilian Hospitals, and there are few studies which show the efficacy of control measures in such situations. This study evaluated intensive care unit (ICU) patients, in two years divided in control, intervention and post-intervention group. Intervention measures: hands-on educational programs for healthcare workers; early identification of MRSA infected or colonized patients, labeled with a bed-identification tag for contact isolation; nasal carriers, patients, and healthcare professionals treated with topical mupirocin for five days. The hospital infection rates in the control period were compared to the ones in the post-intervention period. Hospital infection rates were found by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; Methicillin-resistant Staphylococcus aureus; Intensive care unit infections. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702007000100015 |
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| Rodríguez-Noriega,Eduardo; Seas,Carlos. |
| Methicillin-resistant Staphylococcus aureus (MRSA) clones belonging to the Brazilian, Pediatric, Cordobes/Chilean and New York/Japan clonal complexes are widely distributed across Latin America, although their individual distribution patterns and resistance to antimicrobial drugs are constantly changing. Furthermore, clones with increased virulence are beginning to appear more frequently both in hospital and community settings, and there is evidence that virulence factors can be transferred between hospital- and community-associated clones through recombination. These changing patterns have significant implications for clinical practice in the region. Most importantly, clinicians need to be aware of the changing antimicrobial resistance profile of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; Clones; Molecular epidemiology; Latin America. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000800004 |
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| Mimica,M.J.; Berezin,E.N.; Carvalho,R.L.B.; Mimica,I.M.; Mimica,L.M.J.; Sáfadi,M.A.P.; Schneider,E.; Caiaffa-Filho,H.H.. |
| We evaluated the performance of several methods for the detection of methicillin resistance in Staphylococcus aureus using 101 clinical S. aureus isolates from pediatric patients in a tertiary hospital in Brazil; 50 isolates were mecA-positive and 51 were mecA-negative. The Etest and oxacillin agar screening plates were 100% sensitive and specific for mecA presence. Oxacillin and cefoxitin disks gave sensitivities of 96 and 92%, respectively, and 98% specificity. Alterations of CLSI cefoxitin breakpoints increased sensitivity to 98%, without decreasing specificity. Our results highlight the importance of a continuing evaluation of the recommended microbiological methods by different laboratories and in different settings. If necessary, laboratories should... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; Disc diffusion; Cefoxitin; MecA. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702007000400009 |
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| Luna,Carlos M; Rodríguez-Noriega,Eduardo; Bavestrello,Luis; Gotuzzo,Eduardo. |
| The global spread of methicillin-resistant Staphylococcus aureus (MRSA) means it is now a pathogen of worldwide public health concern. Within Latin America, MRSA is highly prevalent, with the proportion of S. aureus isolates that are methicillin-resistant on the rise, yet resources for managing the infection are limited. While several guidelines exist for the treatment of MRSA infections, many are written for the North American or European setting and need adaptation for use in Latin America. In this article, we aim to emphasize the importance of appropriate treatment of MRSA in the healthcare and community settings of Latin America. We present a summary of the available guidelines and antibiotics, and discuss particular considerations for clinicians... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; Treatment; Antibiotic therapy; Latin America. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000800007 |
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| Romanelli,RMC; Clemente,WT; Lima,SSS; Rezende,EM; Martinho,GH; Paiva,LFR; Neves,FAC; Madeira,JGC; Amâncio,GCS; Lima,AS; Faria,LC; Coutinho,RL. |
| Methicillin-resistant Staphylococcus aureus (MRSA) infections frequently complicate the post-operative course of transplant recipients, and despite nasal carriage and endemic colonization, MRSA outbreaks are not commonly described. This study reports a case of MRSA outbreak and discusses infection control measures and recommendations for this situation. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; Outbreak; Surgical site infection; Liver transplantation; RAPD. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000100011 |
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| Registros recuperados: 35 | |
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