Heavy Metal Resistant of E. coli Isolated from Wastewater Sites in Assiut City, Egypt

被引：0
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作者：
R. N. N. Abskharon
S. H. A. Hassan
S. M. F. Gad El-Rab
A. A. M. Shoreit
机构：
[1] University of Assiut,Faculty of Science, Botany Department
来源：
Bulletin of Environmental Contamination and Toxicology | 2008年 / 81卷
关键词：
Heavy metal resistance; Antibiotics resistance; Wastewater;
D O I：
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学科分类号：
摘要：
Twelve isolates of E. coli were isolated from wastewater of El-Malah canal located in Assiut, Egypt and were checked for their heavy metal tolerance. One isolate has tested for its multiple metal resistances and found to be plasmid mediated with molecular weights 27 and 65 kb for hexa- and trivalent chromium. It was identified as E. coli ASU 7. Its minimal inhibitory concentration (MIC) for Cu2+, Co2+, Ni2+, Zn2+, Cr6+, Cr3+, Cd2+ and Pb2+ were 1.57, 2.55, 1.7, 9.17, 0.48, 7.69, 4.4 and 3.1 mM, respectively. Growth kinetics was determined under Cr6+ and Cr3+ stress. SDS-PAGE of protein profile shows that 10 ppm (0.19 mM) of Cr6+ induces new protein with molecular weight 23 kDa.
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