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| Registros recuperados: 36 | |
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| Japoni,Aziz; Ziyaeyan,Mazyar; Jmalidoust,Marzieh; Farshad,Shohreh; Alborzi,Abdolvahab; Rafaatpour,Noraladdin; Badiee,Parisa. |
| Nosocomial infections caused by methicillin-resistant staphylococci (MRSA) pose a serious problem in many countries. This study aimed to determine the antibacterial susceptibility patterns of methicillin sensitive and resistant Staphylococcus aureus isolates from the hospitalized patients. Totally 356 isolates of Staphylococcus aureus (S. aureus) including 200, 137 and 19 corresponding to MSSA, MRSA, and intermediate MRSA strains, respectively were isolated. Antibacterial susceptibility patterns of the isolates to 14 antibiotics were examined using Kirby-Bauer method. MICs of 15 antibiotics to 156 MRSA isolates were determined by E test method. Cross-resistances of MRSA isolates (137+19) to the other tested antibiotics were also determined. S.aureus with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; Minimum inhibitory concentration; Empirical therapy. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000300005 |
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| Sá,Marcus Mandolesi; Ferreira,Misael; Lima,Emerson Silva; Santos,Ivanildes dos; Orlandi,Patrícia Puccinelli; Fernandes,Luciano. |
| Bacterial resistance to commonly used antibiotics has been recognized as a significant global health issue. In this study, we carried out the screening of a family of allylic thiocyanates for their action against a diversity of bacteria and fungi with a view to developing new antimicrobial agents. Allylic thiocyanates bearing halogenated aryl groups, which were readily obtained in two steps from the Morita-Baylis-Hillman adducts, showed moderate-to-high activity against selective pathogens, including a methicillin-resistant S. aureus (MRSA) strain. In particular cases, methyl (Z)-3-(2,4-dichlorophenyl)-2-(thiocyanomethyl)-2-propenoate exhibited antimicrobial activity comparable to the reference antibiotic Imipenem. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Allylic thiocyanate; Morita-Baylis-Hillman reaction; MRSA. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300007 |
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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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| Ribas,Rosineide Marques; Gontijo-Filho,Paulo Pinto; Darini,Ana Lúcia da Costa. |
| In this study, for detection of methicillin-resistant S. aureus (MRSA), a mecA multiplex PCR-based amplification was compared with the 1 µg oxacillin disk diffusion test, detection of minimal inhibitory concentration (MIC), and screening in agar with 4% NaCl and 6 µg/mL oxacillin. Among 24 isolates obtained from blood, mecA gene was detected in only 16 (66.7%) isolates by multiplex PCR. The MIC test showed a range of resistance to oxacillin from 0.19 to 512 µg/mL, among these isolates. Data obtained by screening and dilution tests showed that sensitivity to methicillin was 80.0% and 72.8%, respectively, when compared with the presence of mecA gene (multiplex). All isolates, including the negatives, when revaluated for mecA gene by PCR were positive.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Multiplex PCR; MRSA; Beta-lactamase; MecA gene. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000500012 |
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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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| 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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| 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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| 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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| Teixeira,M.M.; Araújo,M.C.; Silva-Carvalho,M.C.; Beltrame,C.O.; Oliveira,C.C.H.B.; Figueiredo,A.M.S.; Oliveira,A.G.. |
| In this study, genotyping techniques including staphylococcal chromosomal cassette mec (SCCmec) typing, pulsed-field gel electrophoresis (PFGE), multilocus sequence typing (MLST) and restriction-modification tests were used to compare the molecular characteristics of methicillin-resistant Staphylococcus aureus (MRSA) isolates recovered at two times within a 10-year interval (1998 and 2008) from a tertiary Brazilian hospital. In addition, the antimicrobial susceptibility profiles were analyzed. All 48 MRSA isolates from 1998 and 85.7% from 2008 (48/56 isolates) displayed multidrug-resistance phenotypes and SCCmec III. All but one of the 13 representative SCCmec III isolates belonged to CC8 and had PFGE patterns similar to that of the BMB9393 strain... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; Antimicrobial susceptibility; CC5; Cordobes clone; Trimethoprim-sulfamethoxazole. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000700011 |
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| Saseedharan,Sanjith; Sahu,Manisa; Chaddha,Roonam; Pathrose,Edwin; Bal,Arun; Bhalekar,Pallavi; Sekar,Priyadharshini; Krishnan,Padma. |
| Abstract Introduction The present study attempts to examine the microbial profile and antibiotic susceptibility of diabetic foot infections in the intensive care unit of a tertiary referral centre for diabetic foot. As part of the study, we also attempted to find the prevalence of blaNDM-like gene among carbapenem-resistant gram negative infections. Methodology A prospective study of 261 patients with diabetic foot infections was performed during the period between January 2014 and June 2014. Results A total of 289 isolates were obtained from 178 tissue samples from 261 patients, 156 (59.7%) males and 105 (40.2%) females, with a mean age of 58 years (-15 years), having diabetic foot infection. No growth was seen in thirty eight (17.6%) tissue samples.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diabetic foot infection; BlaNDM; MRSA. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000200401 |
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| Sousa Júnior,Francisco Canindé de; Néri,Gildelane da Silva; Silva,Ana Karine; Araújo,Bibiana Priscila Rodrigues Câmara de; Guerra,Myrian Júlia de Paiva Dourado; Fernandes,Maria José de Britto Costa; Milan,Eveline Pipolo; Melo,Maria Celeste Nunes de. |
| Many methods have been described for the detection of methicillin-resistant Staphylococcus aureus (MRSA), but the heterogeneous expression of methicillin resistance affects the reliability of these methods. The aim of the present study was to evaluate some methods for detecting methicillin resistance in Staphylococcus aureus isolates in a university hospital located in the Northeast of Brazil. Among the isolates, 15 were methicillin-susceptible and 45 were methicillin-resistant, including low-level heterogeneous resistance strains. Both the 30 µg-cefoxitin disk and PBP2a test had 100% sensibility/specificity and appear to be good options for the detection of MRSA in the clinical laboratory. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MRSA; Methicillin resistance; Heterogeneous resistance; Cefoxitin; PBP2a. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000200009 |
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| Sousa-Junior,F.C. de; Silva-Carvalho,M.C.; Fernandes,M.J.B.C.; Vieira,M.F.P.; Pellegrino,F.L.P.C.; Figueiredo,A.M.S.; Melo,M.C.N. de; Milan,E.P.. |
| Methicillin-resistant Staphylococcus aureus (MRSA) is a major agent of hospital infections worldwide. In Brazil, a multiresistant MRSA lineage (ST239-SCCmecIIIA), the so-called Brazilian epidemic clone (BEC), has predominated in all regions. However, an increase in nosocomial infections caused by non-multiresistant MRSA clones has recently been observed. In the present study, 45 clinical isolates of MRSA obtained from a university hospital located in Natal city, Brazil, were identified by standard laboratory methods and molecularly characterized using staphylococcal chromosome cassette mec (SCCmec) typing and pulsed-field gel electrophoresis. Antimicrobial susceptibility testing was carried out using CLSI methods. The MRSA isolates studied displayed a... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Methicillin-resistant Staphylococcus aureus; MRSA; Antimicrobial resistance; Brazilian epidemic clone; Pediatric clone; SCCmecIV. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009001000002 |
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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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| 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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| Registros recuperados: 36 | |
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