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| Sereno,MJ; Ziech,RE; Druziani,JT; Pereira,JG; Bersot,LS. |
| ABSTRACT The objectives of this study were to evaluate the antimicrobial resistance and the biofilm-producing ability of Salmonella sp. strains isolated from frozen poultry carcasses. Antimicrobial susceptibility was tested by the disk-diffusion method. Biofilm-producing ability was determined in 96-well polystyrene microplates stained with crystal violet at 1%. Out of the 22 strains tested, all were multiresistant, that is, resistant to more than three antimicrobial classes, and 72.7% were able to form biofilms. The highest resistance rates obtained were against sulfonamides, tetracycline, and quinolones. On the other hand, 100% of the strains were sensitive to chloramphenicol. According to the rate of biofilm formation, 3 (13.6%) and 13 (59.1%) strains... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofilm formation; Food pathogens; Multidrug-resistance; Poultry meat. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000100103 |
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| Santo,Edilene; Salvador,Miriam Mendonça; Marin,José Moacir. |
| Multiple resistances to antimicrobial drugs arising in Escherichia coli isolates may complicate therapeutic management of urinary tract infection (UTI) by this organism. In order to assess the multidrug resistance (MDR) among urinary E. coli isolates, we have tested 11 antimicrobial drugs against 67 isolates from outpatients attended in a tertiary-care teaching hospital and of 78 isolates from a municipal health unit, respectively in Ribeirão Preto, State of São Paulo, Brazil. Seventy-six percent and 22% of the isolates from the tertiary-care hospital and the municipal unit, respectively, were resistant to three or more different classes of agents, and were considered to present MDR. Among the isolates from the hospital patients, 73.0%, 65.0%, 58.0%, 58.0%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urinary tract infections; Escherichia coli; Antimicrobial susceptibility; Multidrug-resistance. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702007000600010 |
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| Café Oliveira,Luita Nice; Muniz-Sobrinho,Jairo da Silva; Viana-Magno,Luiz Alexandre; Oliveira Melo,Sônia Cristina; Macho,Antonio; Rios-Santos,Fabrício. |
| Abstract Multidrug-resistant tuberculosis (MDRTB) is a serious world health problem that limits public actions to control tuberculosis, because the most used anti-tuberculosis first-line drugs fail to stop mycobacterium spread. Consequently, a quick detection through molecular diagnosis is essential to reduce morbidity and medical costs. Despite the availability of several molecular-based commercial-kits to diagnose multidrug-resistant tuberculosis, their diagnostic value might diverge worldwide since Mycobacterium tuberculosis genetic variability differs according to geographic location. Here, we studied the predictive value of four common mycobacterial mutations in strains isolated from endemic areas of Brazil. Mutations were found at the frequency of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomarkers; Diagnosis; Multidrug-resistance; Mycobacterium tuberculosis. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000200166 |
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| Amaral,Renata Claro Ribeiro do; Caleffi-Ferracioli,Katiany Rizzieri; Demitto,Fernanda de Oliveira; Almeida,Aryadne Larissa de; Siqueira,Vera Lucia Dias; Scodro,Regiane Bertin de Lima; Leite,Clarice Queico Fujimura; Pavan,Fernando Rogério; Cardoso,Rosilene Fressatti. |
| The membrane-based efflux pump systems are recognized to have an important role in pathogenicity and drug resistance in Mycobacterium tuberculosis by the extrusion of toxic substrates and drugs from the inner bacillus. This study aimed to investigate the in vitro interaction of Verapamil (VP), an efflux pump inhibitor, with the classical first-line anti-tuberculosis drug isoniazid (INH) in resistant and susceptible M. tuberculosis clinical isolates. Seven multidrug-resistant (MDR), three INH monoresistant and four susceptible M. tuberculosis clinical isolates were tested for the INH and VP combination by modified Resazurin Microtiter Assay Plate (REMA). Fractional Inhibitory Concentration (FIC) and Modulation Factor (MF) were determined. The INH plus VP... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tuberculosis; Multidrug-resistance; Efflux pumps; Efflux pumps inhibitors; Isoniazid. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100588 |
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