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Registros recuperados: 9
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Antibiotic resistance and molecular typing of Pseudomonas aeruginosa: focus on imipenem BJID
Freitas,Ana Lúcia Peixoto de; Barth,Afonso Luis.
Susceptibility tests by disk diffusion and by E-test and molecular typing by macrorestriction analysis were performed to determine the relatedness of Pseudomonas aeruginosa isolates from three distinct hospitals. The resistance profile of 124 isolates to 8 antimicrobial agents was determined in three different hospitals, in Porto Alegre, Brazil. Frequencies of susceptibility ranged from 43.9% for carbenicillin to 87.7% for ceftazidime. Cross-resistance data of imipenem-resistant isolates indicated that most (70%) were also resistant to carbenicillin, although 30% remained susceptible to ceftazidime and cefepime. In general, susceptibility profiles were not able to determine relatedness among isolates of P. aeruginosa. On the other hand, molecular typing by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pseudomonas aeruginosa; Antibiotic resistance; Imipenem.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702002000100001
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Bloodstream infection by mcr-1-harboring Escherichia coli in a cancer patient in southern Brazil BJID
Lorenzoni,Vinícius Victor; Dalmolin,Tanise Vendruscolo; Franco,Laísa Nunes; Barth,Afonso Luis; Hörner,Rosmari.
Tipo: Info:eu-repo/semantics/other
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000400356
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Carbapenem-resistant Pseudomonas aeruginosa: clonal spread in southern Brazil and in the state of Goiás BJID
Scheffer,Mara Cristina; Gales,Ana Cristina; Barth,Afonso Luis; Carmo Filho,José Rodrigues do; Dalla-Costa,Libera Maria.
This study evaluated the clonal spread of carbapenem-resistant P. aeruginosa producing SPM-1 type metallo-β-lactamase (MBL), at the university hospital of Florianópolis, Santa Catarina, Brazil, compared to an epidemic clone previously reported, as well as strains collected in other three Brazilian states. Among the isolates, 17 (62%) were clonal and highly related to strains from other regions of Brazil. Six clonal strains harbored the blaSPM-1 gene. The finding of a unique SPM-1 producer clone suggests that its dissemination has contributed to the high resistance to carbapenems in Brazilian hospitals
Tipo: Info:eu-repo/semantics/other Palavras-chave: P. aeruginosa; Carbapenem resistance; Metallo- Β-lactamase.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000500014
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Distribution of erm genes and low prevalence of inducible resistance to clindamycin among staphylococci isolates BJID
Coutinho,Vivian de Lima Spode; Paiva,Rodrigo Minuto; Reiter,Keli Cristine; de-Paris,Fernanda; Barth,Afonso Luis; Machado,Alice Beatriz Mombach Pinheiro.
INTRODUCTION: Resistance to macrolides, lincosamides and streptogramins B (MLS B antibiotics) in staphylococci may be due to modification in ribosomal target methylase encoded by erm genes. The expression of MLS B resistance lead to three phenotypes, namely constitutive resistance (cMLS B), inducible resistance (iMLS B), and resistance only to macrolides and streptogramins B (MS B). The iMLS B resistance is the most difficult to detect in the clinical laboratory. OBJECTIVE: This study investigated the expression of MLS B resistance and the prevalence of the erm genes among 152 clinical isolates of Staphylococcus aureus and coagulase-negative Staphylococcus (CNS) from Hospital de Clínicas de Porto Alegre. METHODS: Primary MLS B resistance was detected by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Staphylococcus; Resistance; Erm genes; Macrolides.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000600004
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Group B Streptococcus detection: comparison of PCR assay and culture as a screening method for pregnant women BJID
de-Paris,Fernanda; Machado,Alice Beatriz Mombach Pinheiro; Gheno,Tailise Conte; Ascoli,Bruna Maria; Oliveira,Kátia Ruschel Pilger de; Barth,Afonso Luis.
Streptococcus agalactiae or group B Streptococcus (GBS) is one of the most important causal agents of serious neonatal infections. Numerous assays have been evaluated for GBS screening in order to validate a fast and efficient method. The aim of this study was to compare the culture technique (established as the gold standard) with the molecular method of polymerase chain reaction (PCR) with specific primers (atr gene). Two hundred and sixty-three samples were analyzed. Vaginal samples were collected, according to the Centers for Disease Control and Prevention (CDC) recommendations, from women over 35 weeks of pregnancy at Hospital de Clínicas de Porto Alegre (HCPA). Two different extraction methods were tested in all samples collected. PCR technique...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Streptococcus agalactiae; Polymerase chain reaction; Culture; Pregnancy.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702011000400004
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Mobile genetic elements related to carbapenem resistance in Acinetobacter baumannii BJM
Pagano,Mariana; Martins,Andreza Francisco; Barth,Afonso Luis.
Abstract Acinetobacter baumannii is widely recognized as an important pathogen associated with nosocomial infections. The treatment of these infections is often difficult due to the acquisition of resistance genes. A. baumannii presents a high genetic plasticity which allows the accumulation of these resistance determinants leading to multidrug resistance. It is highlighted the importance of the horizontal transfer of resistance genes, through mobile genetic elements and its relationship with increased incidence of multidrug resistant A. baumannii in hospitals. Considering that resistance to carbapenems is very important from the clinical and epidemiological point of view, the aim of this article is to present an overview of the current knowledge about...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acinetobacter baumannii; Antimicrobial resistance; Mobile genetic elements; Carbapenem resistance.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000400785
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Ocurrence of blaSPM-1 and blaIMP-1 genes of metallo-beta-lactamases in clinical isolates of Pseudomonas aeruginosa from three universitary hospitals in the city of Porto Alegre, Brazil BJM
Gaspareto,Patrick Barcelos; Martins,Andreza Francisco; Zavascki,Alexandre Prehn; Barth,Afonso Luis.
We described the ocurrence of metallo-beta-lactamases (MBL) genes blaSPM-1 and blaIMP-1 in clinical isolates of Pseudomonas aeruginosa resistant to imipenem and/or ceftazidime obtained from three universitary hospitals in the city of Porto Alegre, Brazil. The MBL production was screened by phenotypic test and the genes were detected by PCR.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pseudomonas aeruginosa; Imipenem resistance; Metallo-beta-lactamase.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100022
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Prevalence, susceptibility profile for fluconazole and risk factors for candidemia in a tertiary care hospital in southern Brazil BJID
Aquino,Valério Rodrigues; Lunardi,Luciano W.; Goldani,Luciano Zubaran; Barth,Afonso Luis.
Bloodstream infections caused by yeast, Candida spp, are quite important clinically and epidemiologically due to a high mortality rate and an increasing number of non-albicans species with a more resistant (differentiated susceptibility) profile. We examined species prevalence and susceptibility profile for fluconazole and the risk for nosocomial infections by Candida spp at the Hospital de Clínicas de Porto Alegre, a general tertiary care hospital in southern Brazilian, through a retrospective study, beginning with positive cultures of hospitalized patients. The distribution by species in 131 documented episodes was as follows: Candida albicans (45%), C. parapsilosis (24.4%), C. tropicalis (15.3%), C. glabrata (6.9%), C. krusei (4.6%) and 3.8% other...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fluconazole; Candidemia; Risks; Southern Brazil.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702005000500009
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Role of the concentration process in the recovery of Candida albicans from blood Rev. Microbiol.
Freitas,Ana Lúcia Peixoto de; Barth,Afonso Luis.
The lysis-centrifugation system (Isolator TM) is recognized as the standard method for recovery of Candida spp. from blood. In this study, the effect of the concentration process of this system was compared with conventional methods of blood culture using liquid and biphasic media. The tests were performed in vitro using Candida albicans in counts of 100, 10, 1, and 0.5 cells/ml of blood. Cultures onto chocolate agar were performed with the sediment obtained after centrifugation of IsolatorTM tube and with liquid and biphasic media after their incubation for 24 h at 35oC. Gram stain prepared from the conventional methods were also evaluated in the first 24 h. It was possible to detect Candida albicans in blood, regardless both the number of cells or...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Candidemia; Blood culture; Lysis-centrifugation system.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000100011
Registros recuperados: 9
Primeira ... 1 ... Última
 

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