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| INFANTE CANGREJO,Viviana; DONATO RONDÓN,Jhon Charles. |
| RESUMEN En los trópicos, el cambio climático puede significar un incremento en la temperatura que puede afectar la diversidad biológica de los ecosistemas fluviales, favoreciendo la llegada de especies propias de aguas más cálidas. La variación de temperatura puede también afectar las relaciones tróficas y el metabolismo del sistema. En el presente estudio, se analizó el efecto de 2-4 °C de aumento de la temperatura del agua sobre el ensamble de diatomeas y el metabolismo del río Tota (alta montaña andina). Para este propósito, se utilizaron canales artificiales de recirculación, en los que diariamente se midieron variables fisicoquímicas (pH, conductividad, temperatura, oxígeno disuelto y velocidad del agua), se recolectaron e identificaron diatomeas, se... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arroyo Neotropical; Biofilm; Cambio climático; Canales recirculantes. |
| Ano: 2017 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2017000200008 |
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| COSTA,GÉSSICA A.; ROSSATTO,FERNANDA C.P.; MEDEIROS,ALINE W.; CORREA,ANA PAULA F.; BRANDELLI,ADRIANO; FRAZZON,ANA PAULA G.; MOTTA,AMANDA DE S. DA. |
| ABSTRACT The adhesion ability of bacteria to abiotic surfaces has important implications in food industries, because these organisms can survive for long periods through the biofilm formation. They can be transferred from one place to another in the industry causing contamination of the food processing environment. In this study, the antibacterial and antibiofilm activities of the antimicrobial peptide P34, characterized as a bacteriocin-like substance (BLS P34) were tested against planktonic and sessile cells of Staphylococcus aureus and Enterococcus faecalis isolated from foods. The BLS P34 showed inhibitory effect against all planktonic cells of E. faecalis. The inhibition of biofilm formation and the eradication of pre-formed biofilm were evaluated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofilm; Crystal violet; Food industry; MTT assay; Peptide P34. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100073 |
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| Marangoni,Paulo Roberto Dantas; Robl,Diogo; Berton,Marcos Antonio Coelho; Garcia,Carlos Mario; Bozza,Angela; Porsani,Mariana Vieira; Dalzoto,Patricia do Rocio; Vicente,Vânia Aparecida; Pimentel,Ida Chapaval. |
| The aim of this study was evaluate, two methods for the detection and identification of sulphate reducing bacteria (SRB): ML medium and PCR with specific primers for SRB groups. SRB were detected through the selective medium only on carbon steel, which showed corrosion. Employing specific PCR primer, SBR were detected from all the metallic components assayed, even those that did not present visible corrosion spots, such stainless steel and copper alloys. Despite the presence or absence of corrosion at the later stages effectively by using the selective medium,, the initial stages of the corrosion could only be detected by the amplification of total DNA with SRB specific primers. The early detection of SRB could be employed for preventing the damages on... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Metallic surface; Hydroelectric power station; Biofilm; Biocorrosion. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000500011 |
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| Sella,Sandra Regina Barroso Ruiz; Guizelini,Belquis Palácio; Vandenberghe,Luciana Porto de Souza; Medeiros,Adriane Bianchi Pedroni; Soccol,Carlos Ricardo. |
| Studies were conducted to evaluate Bacillus atrophaeus spores' production by solid-state fermentation (SSF) using sugarcane bagasse as support and soybean molasses as substrate at lab-scale in column bioreactors (forced aeration), plastic bags and Erlenmeyer flasks (aeration by diffusion). Different moisture contents (84%, 86% and 88%; 89%, 91% and 93%) and aeration rates (30mL/min, 45mL/min, 60mL/min and 90mL/min) were studied. The best condition for spore production (3.3x10(10) CFU.g-¹dry matter) in column bioreactor was 80% of initial humidity and no aeration. In Erlenmeyer flasks and plastic bags the best sporulation production reached 1.7 up to 4.7x10(10) CFU.g-1dry matter with 88-93% of initial moisture. The aeration rate had no significant effect on... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacillus atrophaeus; Spores; Solid state fermentation; Column bioreactor; Biofilm. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000700021 |
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| Lima,Jailton Lobo da Costa; Alves,Lilian Rodrigues; Jacomé,Paula Regina Luna de Araújo; Bezerra Neto,João Pacífico; Maciel,Maria Amélia Vieira; Morais,Marcia Maria Camargo de. |
| ABSTRACT Introduction: Biofilm production is an important mechanism for the survival of Pseudomonas aeruginosa and its relationship with antimicrobial resistance represents a challenge for patient therapeutics. P. aeruginosa is an opportunistic pathogen frequently associated to nosocomial infections, especially in imunocompromised hosts. Objectives: Analyze the phenotypic biofilm production in P. aeruginosa isolates, describe clonal profiles, and analyze quorum sensing (QS) genes and the occurrence of mutations in the LasR protein of non-biofilm producing isolates. Methods: Isolates were tested for biofilm production by measuring cells adherence to the microtiter plates. Clonal profile analysis was carried out through ERIC-PCR, QS genes were by specific... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pseudomonas aeruginosa; Biofilm; Multiresistance; Quorum sensing (QS). |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000200129 |
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| Ferreira,Thiago de Oliveira; Koto,Rafael Yoshio; Leite,Gabriel Fialkovitz da Costa; Klautau,Giselle Burlamaqui; Nigro,Stanley; Silva,Cely Barreto da; Souza,Ana Paula Idalgo da Fonseca; Mimica,Marcelo Jenne; Cesar,Regina Grigolli; Salles,Mauro José Costa. |
| Abstract Objectives To compare cultured microorganisms identified on endotracheal tubes biofilms through sonication technique with traditional tracheal aspirate collected at extubation of pediatric intensive care unit patients. Methods Demographic and epidemiological data were analyzed to identify factors possibly related with the microbiological profile of the two collection methods. Associations between categorical and continuous variables were analyzed using the chi-square or Fisher's exact test, or Student's t test. p-Value <0.05 were considered significant. Results Thirty endotracheal tubes and tracheal aspirates samples from 27 subjects were analyzed. Only one patient presented the clinical diagnosis of ventilator-associated pneumonia. Overall,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sonication; Endotracheal tube; Biofilm; Tracheal aspirate. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000500468 |
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| Pal,Rahul; Hameed,Saif; Sharma,Sharda; Fatima,Zeeshan. |
| ABSTRACT Novel strategies to combat the ever increasing burden of drug resistance in Mycobacterium tuberculosis (MTB) causing tuberculosis (TB) remains a global concern. The ability of MTB to sense and adapt to restricted iron conditions in the hostile environment is essential for their survival and confers the basis of their success as dreadful pathogen. The striking and clinically relevant virulence trait of MTB is its ability to form biofilms and adhere to the host cells. The present study elucidated the effect of iron deprivation on biofilm formation and cell adherence of Mycobacterium smegmatis, a non-pathogenic surrogate of MTB. Firstly, we showed that iron deprivation leads to enhanced cell sedimentation rate and altered colony morphology depicting... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Iron; Morphology; Biofilm; Anti-TB drugs. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000600585 |
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| Sun,Erlin; Liang,Gehong; Wang,Lining; Wei,Wenjie; Lei,Mingde; Song,Shiduo; Han,Ruifa; Wang,Yubao; Qi,Wei. |
| Abstract Aims We sought to characterize the antibiotic susceptibility of strains of Stenotrophomonas maltophilia isolated from clinical samples, and the role of Stenotrophomonas maltophilia biofilm in antibiotic resistance. Methods Fifty-one clinical Stenotrophomonas maltophilia isolates were obtained from patients with nosocomial infection in the surgical wards and ICUs of six general hospitals in Tianjin, China. In vitro models of Stenotrophomonas maltophilia biofilms were established and confirmed by scanning electron microscopy and fluorescence microscopy with silver staining. The minimal inhibitory concentrations and biofilm inhibitory concentrations of commonly used antibiotics were determined. Results 47 of 51 strains were resistant to three or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stenotrophomonas maltophilia; Biofilm; Antibiotic resistance; Nosocomial. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000400365 |
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| Zmantar,Tarek; Ben Slama,Rihab; Fdhila,Kais; Kouidhi,Bochra; Bakhrouf,Amina; Chaieb,Kamel. |
| Abstract Objectives: This study aims to investigate the antimicrobial and the anti-biofilm activities of Lactobacillus plantarum extract (LPE) against a panel of oral Staphylococcus aureus (n = 9) and S. aureus ATCC 25923. The in vitro ability of LPE to modulate bacterial resistance to tetracycline, benzalchonium chloride, and chlorhexidine were tested also. Methods: The minimum inhibitory concentrations (MICs) and the minimal bactericidal concentrations of Lactobacillus plantarum extract, tetracycline, benzalchonium chloride and clohrhexidine were determined in absence and in presence of a sub-MIC doses of LPE (1/2 MIC). In addition, the LPE potential to inhibit biofilm formation was assessed by microtiter plate and atomic force microscopy assays.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial; Staphylococcus aureus; Biofilm; Antibiotics; Synergetic; Lactobacillus. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000100027 |
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| Brilhante,Raimunda Sâmia Nogueira; Caetano,Erica Pacheco; Oliveira,Jonathas Sales de; Castelo-Branco,Débora de Souza Collares Maia; Souza,Elizabeth Ribeiro Yokobatake; Alencar,Lucas Pereira de; Cordeiro,Rossana de Aguiar; Bandeira,Tereza de Jesus Pinheiro Gomes; Sidrim,José Júlio Costa; Rocha,Marcos Fábio Gadelha. |
| ABSTRACTThe antifungal activity of some statins against different fungal species has been reported. Thus, at the first moment, the in vitro antifungal activity of simvastatin, atorvastatin and pravastatin was tested againstCandida spp. and Cryptococcus spp. Then, in a second approach, considering that the best results were obtained for simvastatin, this drug was evaluated in combination with antifungal drugs against planktonic growth and tested against biofilms ofCandida spp. and Cryptococcus spp. Drug susceptibility testing was performed using the microdilution broth method, as described by the Clinical and Laboratory Standards Institute. The interaction between simvastatin and antifungals against planktonic cells was analyzed by calculating the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Candida; Cryptococcus; Simvastatin; Antifungal activity; Biofilm. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702015000500459 |
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| Registros recuperados: 111 | |
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