Inicio  /  Acta Scientiarum: Technology  /  Vol: 43 Par: 0 (2021)  /  Artículo
ARTÍCULO
TITULO

Enterococci and Bacilli from surface water: assessment of their resistance to copper and antibiotics

Luciana Furlaneto Maia    
Gabriela Batista Gomes Bravo    
Alex Kiyomassa Watanabe    
Nayara de Oliveira Batista    
Márcia Cristina Furlaneto    

Resumen

Heavy metal-resistant bacteria can be efficient bioremediators of metals and might provide an alternative method for metal removal in contaminated environments. The present study aims to isolate bacteria from the aquatic environment and evaluate their potential tolerance to copper metal, aiming at bioremediation processes. Also, compare co-resistance to heavy metal and antibiotics. The morphology of isolates was observed, and sequence analysis (16S ribosomal DNA) revealed that isolated strains were closely related to species belonging to the genera Enterococcus and Bacillus. Bacterial isolates were resistant to CuSO4, with a minimum inhibitory concentration of 0.78 mg ml-1. Enterococcus lactis was resistant to a combination of copper and tetracycline. The other tested isolates were sensitive to the tested antimicrobials. The metal removal ability of these isolates was assayed using atomic absorption spectroscopy, and the strains 27, 23, and E. lactis were best at removing heavy metals, at 87.7%. Enterococcus casseliflavus EC55 was 62%, followed by Bacillus aerius (18.4%), E. casseliflavus EC70 (10%) and Bacillus licheniformis (10%). Based on our findings, Enterococcus sp and Bacillus sp. have potential applications in enhanced remediation of contaminated environments.

 Artículos similares

       
 
Jamilah Borjac, Wafaa Zeino, Alaa Matar, Salwa Khawaja, Maxime Merheb and Rachel Matar    
Safe, accessible, and good water quality are essential characteristics for reducing various waterborne diseases. Since domestic water is the water most consumed by Lebanese people, cleaning household water tanks is important to prevent their exposure to ... ver más
Revista: Water

 
Narjes J. Alamer, Munirah F. Aldayel and Ashraf Khalifa    
Plastic pollution is one of the most serious environmental issues, causing severe environmental damage. It is of vital importance to find an efficient and eco-friendly approach to biodegrading plastics. The aim of this study was to isolate and characteri... ver más
Revista: Applied Sciences

 
Jesús Dassaef López-Barrios, Jesús Arturo Escobedo Cabello, Alfonso Gómez-Espinosa and Luis-Enrique Montoya-Cavero    
In this paper, a mask region-based convolutional neural network (Mask R-CNN) is used to improve the performance of machine vision in the challenging task of detecting peduncles and fruits of green sweet peppers (Capsicum annuum L.) in greenhouses. One of... ver más
Revista: Applied Sciences

 
María José Alvarado-López, Sofía E. Garrido-Hoyos, María Elena Raynal-Gutiérrez, Elie G. El-Kassis, Víctor M. Luque-Almagro and Genoveva Rosano-Ortega    
A native cyanide-degrading bacterial consortium was isolated from goldmine tailing sediments. Mine tailings are toxic effluents due to their metal?cyanide complexes. The bacterial consortium was able to degrade an initial sodium cyanide concentration ran... ver más
Revista: Water

 
Veronika Prepilková, Zuzana Perhácová, Marián Schwarz and Katarína Trnková    
There are several sources of mine drainage left over from past mining sites in the Central Slovakian neovolcanites. The neutral pH and high concentrations of sulphates and multiple potentially hazardous elements, such as zinc or manganese, are typical in... ver más
Revista: Water