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| Castro-Silva,Marcus Adonai; Lima,André Oliveira de Souza; Gerchenski,Ana Valéria; Jaques,Daniela Batista; Rodrigues,André Luis; Souza,Pricila Lima de; Rörig,Leonardo Rubi. |
| The coal mining activity is characterized by the generation of large amount of by-products. One of them is pyrite, which tends to acidify the water, solubilizing heavy metals. As a consequence the environment becomes acid and rich in heavy metals, selecting microorganisms able to survive in this condition, which are of great interest as bioremediation agents. This work describes the isolation and characterization of microorganisms from a coal mining area in Santa Catarina. These microorganisms comprised bacteria, fungi and yeasts resistant to zinc, nickel and cadmium. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metal resistance; Coal mining; Acidophilic microorganisms; Bioremediation. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000500015 |
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| Navarro,Claudio A; von Bernath,Diego; Jerez,Carlos A. |
| Microbial solubilizing of metals in acid environments is successfully used in industrial bioleaching of ores or biomining to extract metals such as copper, gold, uranium and others. This is done mainly by acidophilic and other microorganisms that mobilize metals and generate acid mine drainage or AMD, causing serious environmental problems. However, bioremediation or removal of the toxic metals from contaminated soils can be achieved by using the specific properties of the acidophilic microorganisms interacting with these elements. These bacteria resist high levels of metals by using a few "canonical" systems such as active efflux or trapping of the metal ions by metal chaperones. Nonetheless, gene duplications, the presence of genomic islands, the... |
| Tipo: Journal article |
Palavras-chave: Heavy metal resistance; Genomic islands; Environmental bacteria; Biomining; Metal bioremediation; Mobile genetic elements. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000400008 |
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| Lee,SW; Najiah,M; Wendy,W; Nadirah,M; Faizah,SH. |
| A total of 40 bacteria have been successfully isolated from internal organs of the American bullfrog (Rana catesbeiana) raised in Malaysia, namely, eight isolates of Aeromonas spp., 21 of Edwardsiella spp., six of Flavobacterium spp. and five of Vibrio spp. In terms of antibiotic susceptibility testing, each isolate was tested against 21 antibiotics, resulting in 482 (57.3%) cases of sensitivity and 61 (7.3%) cases of partial sensitivity. Meanwhile, 297 (35.4%) bacterial isolates were registered as resistant. The multiple antibiotic resistance (MAR) index of each bacterial species indicated that bacteria from raised bullfrogs have been exposed to tested antibiotics with results ranging from 0.27 to 0.39. Additionally, high percentages of heavy metal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rana catesbeiana; Antibiogram; Heavy metal resistance; Multiple antibiotic resistance; Aeromonas spp.; Edwardsiella spp.; Flavobacterium spp.; Vibrio spp. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992009000200016 |
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| Azam,Mudsser; Jan,Arif Tasleem; Kumar,Ashutosh; Siddiqui,Kehkashan; Mondal,Aftab Hossain; Haq,Qazi Mohd. Rizwanul. |
| Abstract Escalating burden of antibiotic resistance that has reached new heights present a grave concern to mankind. As the problem is no longer confined to clinics, we hereby report identification of a pandrug resistant Escherichia coli isolate from heavily polluted Delhi stretch of river Yamuna, India. E. coli MRC11 was found sensitive only to tobramycin against 21 antibiotics tested, with minimum inhibitory concentration values >256 µg/mL for amoxicillin, carbenicillin, aztreonam, ceftazidime and cefotaxime. Addition of certain heavy metals at higher concentrations were ineffective in increasing susceptibility of E. coli MRC11 to antibiotics. Withstanding sub-optimal concentration of cefotaxime (10 µg/mL) and mercuric chloride (2 µg/mL), and also... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibiotic resistance; ESBLs; Heavy metal resistance; Polluted environment; Resistance genes. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000300471 |
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