| isolation and characterization of a pseudomonas aeruginosa from a virgin brazilian amazon region with potential to degrade atrazine. | the use of pesticides to increase agricultural production can result in the contamination of the environment, causing changes in the genetic structure of organisms and in the loss of biodiversity. this practice is also inducing changes in the rainforest ecosystem. in this work, a pseudomonas aeruginosa isolated from a preservation soil area of the brazilian amazon forest, without usage of any pesticide, was evaluated for its potential to degrade atrazine. this isolate presented all responsible g ... | 2014 | 25035056 |
| multidrug resistant pseudomonas aeruginosa survey in a stream receiving effluents from ineffective wastewater hospital plants. | multi-drug resistant forms of pseudomonas aeruginosa (mdrpa) are a major source of nosocomial infections and when discharged into streams and rivers from hospital wastewater treatment plants (hwwtp) they are known to be able to persist for extended periods. in the city of manaus (western brazilian amazon), the effluent of three hwwtps feed into the urban mindu stream which crosses the city from its rainforest source before draining into the rio negro. the stream is routinely used by manaus resid ... | 2016 | 27558582 |
| coexistence of epidemic colistin-only-sensitive clones of pseudomonas aeruginosa, including the blaspm clone, spread in hospitals in a brazilian amazon city. | nosocomial outbreaks caused by multidrug-resistant (mdr) pseudomonas aeruginosa have been associated to fibrocystic patients and isolates harboring metallo-beta-lactamase (mbl) genes. genotyping is an important tool for interpreting bacterial nosocomial outbreaks and implementing adequate control strategies. the aim of this study was to evaluate whether an outbreak of mdr p. aeruginosa occurring in different hospitals was due to a unique clone or independent isolates. from 2000 to 2003, 108 p. a ... | 2007 | 17650968 |
| antibacterial activity of brazilian amazon plant extracts. | infections caused by multiresistant bacteria are a widespread problem, especially in intensive care units. new antibiotics are necessary, and we need to search for alternatives, including natural products. brazil is one of the hottest spots in the world in terms of biodiversity, but little is known about the chemical and pharmacological properties of most of the plants found in the amazon rain forest and the atlantic forest. we screened 1,220 organic and aqueous extracts, obtained from amazon an ... | 2006 | 17420913 |
| emergence of dhfrxvb and blacarb-4 gene cassettes in class 1 integrons from clinical pseudomonas aeruginosa isolated in amazon region. | integrons play a role in horizontal acquisition and expression of genes, as well as gene reservoir, contributing for the resistance phenotype, particularly relevant to bacteria of clinical importance. we aimed to determine the composition and the organization of the class 1 integron variable region present in pseudomonas aeruginosa clinical isolates from brazil. strains carrying class 1 integrons were resistant to the majority of antibiotics tested, except to imipenem and ceftazidime. sequence a ... | 2006 | 16699713 |
| class 1 integrons in pseudomonas aeruginosa isolates from clinical settings in amazon region, brazil. | a hundred and six pseudomonas aeruginosa isolates from clinical cases were screened using pcr for the presence of integrons and associated resistance gene cassettes. forty-four isolates harboured class 1 integrons (41.5%), of which 29 isolates (66%) also carried gene cassettes. the aaca gene was most frequently found within class 1 integrons (69%), followed by blaoxa family genes (52%). from class 1 integron-positive strains, we detected a total of 15 isolates (34%) carrying no gene cassettes. r ... | 2005 | 15907453 |
| screening of antibacterial extracts from plants native to the brazilian amazon rain forest and atlantic forest. | more than 20% of the world's biodiversity is located in brazilian forests and only a few plant extracts have been evaluated for potential antibacterial activity. in the present study, 705 organic and aqueous extracts of plants obtained from different amazon rain forest and atlantic forest plants were screened for antibacterial activity at 100 microg/ml, using a microdilution broth assay against staphylococcus aureus, enterococcus faecalis, pseudomonas aeruginosa and escherichia coli. one extract ... | 2004 | 15060707 |