RESUMO
Abstract Recently, there has been a lot of interest in the utilization of rhodococci in the bioremediation of petroleum contaminated environments. This study investigates the response of Rhodococcus erythropolis IBBPo1 cells to 1% organic solvents (alkanes, aromatics). A combination of microbiology, biochemical, and molecular approaches were used to examine cell adaptation mechanisms likely to be pursued by this strain after 1% organic solvent exposure. R. erythropolis IBBPo1 was found to utilize 1% alkanes (cyclohexane, n-hexane, n-decane) and aromatics (toluene, styrene, ethylbenzene) as the sole carbon source. Modifications in cell viability, cell morphology, membrane permeability, lipid profile, carotenoid pigments profile and 16S rRNA gene were revealed in R. erythropolis IBBPo1 cells grown 1 and 24 h on minimal medium in the presence of 1% alkanes (cyclohexane, n-hexane, n-decane) and aromatics (toluene, styrene, ethylbenzene). Due to its environmental origin and its metabolic potential, R. erythropolis IBBPo1 is an excellent candidate for the bioremediation of soils contaminated with crude oils and other toxic compounds. Moreover, the carotenoid pigments produced by this nonpathogenic Gram-positive bacterium have a variety of other potential applications.
Assuntos
Adaptação Biológica/efeitos dos fármacos , Adaptação Biológica/genética , Adaptação Biológica/fisiologia , Adaptação Biológica/toxicidade , Compostos Orgânicos/efeitos dos fármacos , Compostos Orgânicos/genética , Compostos Orgânicos/fisiologia , Compostos Orgânicos/toxicidade , /efeitos dos fármacos , /genética , /fisiologia , /toxicidade , Rhodococcus/efeitos dos fármacos , Rhodococcus/genética , Rhodococcus/fisiologia , Rhodococcus/toxicidade , Solventes/efeitos dos fármacos , Solventes/genética , Solventes/fisiologia , Solventes/toxicidadeRESUMO
El Rhodococcus es un bacilo gram+, aerobio, inmóvil, que toma la coloración ácido alcohol resistente en forma inconstante. No esporulado e intracelular, origina una zoonosis que en pacientes VIH+ provoca una infección con localización pulmonar y extrapulmonar. En el 80 por ciento de los casos la forma de presentación primaria es la neumonía cavitada. La inmunodeficiencia del huésped, la localización intracelular y un tratamiento insuficiente se relacionan con la recidiva de la infección. Se presentan 2 casos de infección por este microorganismo, en pacientes VIH+ con localización pulmonar y extrapulmonar y en uno de ellos con carácter recidivante