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| Registros recuperados: 10 | |
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| Frasao,Beatriz da Silva; Medeiros,Valéria; Barbosa,André Victor; de Aguiar,Waldemir Silva; dos Santos,Felipe Faccini; Abreu,Dayse Lima da Costa; Clementino,Maysa Mandetta; de Aquino,Maria Helena Cosendey. |
| Poultry are considered to be the main reservoir of Campylobacter spp. bacteria, an important pathogen for humans. Many studies have reported a rapid selection of fluoroquinolone-resistant strains following the widespread use of these antimicrobials in poultry production and human medicine. The main mechanism of fluoroquinolone resistance in Campylobacter is a mutation in the Quinolone Resistance Determinant Region (QRDR) in the gyrA gene, which codes for the subunit of the enzyme DNA gyrase, the target for fluoroquinolone. The aim of this study was to investigate the mutation in QRDR in the gyrA gene of Campylobacter strains previously isolated from broiler carcasses and feces of laying hens. Thirty-eight strains of C. jejuni and 19 C. coli strains (n=57),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Enrofloxacin; Ciprofloxacin; Poultry; C. jejuni; C. coli. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001102013 |
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| Wojnicz,Dorota; Tichaczek-Goska,Dorota. |
| The aim of this study was to determine the effect of subinhibitory concentrations (sub-MICs) of ciprofloxacin, amikacin and colistin on biofilm formation, motility, curli fimbriae formation by planktonic and biofilm cells of E. coli strains isolated from the urine of patients with various urinary system infections. Quantification of biofilm formation was carried out using a microtiter plate assay and a spectrophotometric method. Bacterial enumeration was used to assess the viability of bacteria in the biofilm. Curli expression was determined by using YESCA agar supplemented with congo red. Using motility agar the ability to move was examined. All the antibiotics used at sub-MICs reduced biofilm formation in vitro, decreased the survival of bacteria, but... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofilm; Sub-MIC; Ciprofloxacin; Amikacin; Colistin. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000100037 |
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| Dong,Guofeng; Li,Jiahui; Chen,Lijiang; Bi,Wenzi; Zhang,Xiaoxiao; Liu,Haiyang; Zhi,Xiaoyang; Zhou,Tieli; Cao,Jianming. |
| ABSTRACT Objective: To evaluate the influence of sub-minimum inhibitory concentrations (MICs) of ciprofloxacin (CIP) on biofilm formation and virulence factors of Escherichia coli clinical isolates. Methods: Sub-MICs of CIP were determined using growth curve experiments. The biofilm-forming capacity of E. coli clinical isolates and E. coli ATCC 25922 treated or untreated with sub-MICs of CIP was assessed using a crystal violet staining assay. The biofilm structure of E. coli isolate was assessed with scanning electron microscopy (SEM). The expression levels of the virulence genes fim, usp, and iron and the biofilm formation genes of the pgaABCD locus were measured using quantification RT-PCR (qRT-PCR) in E. coli isolates and E. coli ATCC 25922. Results:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofilm formation; Ciprofloxacin; Escherichia coli; Sub-minimum inhibitory concentration; Virulence. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702019000100015 |
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| Süle,Judit; Kõrösi,Tímea; Hucker,Attila; Varga,László. |
| The purpose of this study was to test the suitability of Transgalactosylated oligosaccharides-mupirocin lithium salt (TOS-MUP) and MRS-clindamycin-ciprofloxacin (MRS-CC) agars, along with several other culture media, for selectively enumerating bifidobacteria and lactic acid bacteria (LAB) species commonly used to make fermented milks. Pure culture suspensions of a total of 13 dairy bacteria strains, belonging to eight species and five genera, were tested for growth capability under various incubation conditions. TOS-MUP agar was successfully used for the selective enumeration of both Bifidobacterium animalis subsp. lactis BB-12 and B. breve M-16 V. MRS-CC agar showed relatively good selectivity for Lactobacillus acidophilus, however, it also promoted the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mupirocin; Clindamycin; Ciprofloxacin; Bifidobacterium; Lactobacillus acidophilus. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300035 |
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| Silva,G.C.M.; Jabor,V.A.P.; Bonato,P.S.; Martinez,E.Z.; Faria-e-Sousa,S.J.. |
| We aimed to quantify the penetration of ciprofloxacin, ofloxacin, and moxifloxacin into the cornea and aqueous humor of cadaver eyes. A total of 60 enucleated eyes, not eligible for corneal transplantation, were divided into three groups and immersed in commercial solutions of 0.3% ciprofloxacin, 0.3% ofloxacin, or 0.5% moxifloxacin for 10 min. Whole corneas and samples of aqueous humor were then harvested and frozen, and drug concentrations analyzed by liquid chromatography tandem mass spectrometry. The mean corneal concentration of moxifloxacin was twice as high as ofloxacin, and the latter was twice as high as ciprofloxacin. The mean concentration of moxifloxacin in the aqueous humor was four times higher than the other antibiotics, and the mean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciprofloxacin; Eye banking; Eye drops; Fluoroquinolones; Moxifloxacin; Ofloxacin. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000700609 |
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| Ferrari,Rafaela; Galiana,Antonio; Cremades,Rosa; Rodríguez,Juan Carlos; Magnani,Marciane; Tognim,M.C.B.; Oliveira,Tereza C.R.M.; Royo,Gloria. |
| The objective of this study was to identify mutations in the Quinolone Resistance Determining sources Regions (QRDR) of the gyrA, gyrB, parC, and parE genes and to determine if any of the qnr variants or the aac(6')-Ib-cr variant were present in strains of Salmonella spp. isolated in Brazil. A total of 126 Salmonella spp. strains from epidemic (n = 114) and poultry (n = 12) origin were evaluated. One hundred and twelve strains (88.8%) were resistant to nalidixic acid (NAL) and 29 (23.01%) showed a reduced susceptibility to ciprofloxacin (Cip). The mutations identified were substitutions limited to the QRDR of the gyrA gene in the codons for Serine 83, Aspartate 87 and Alanine 131. The sensitivity to NAL seems to be a good phenotypic indication of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salmonella; PMQR; QRDR mutation; Quinolone; Ciprofloxacin. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000200046 |
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| Registros recuperados: 10 | |
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