1. Detection of plasmid mediated colistin resistance mcr-1 gene in ESBL producing Escherichia coli isolated from raw milk hard cheese in Egypt.
- Author
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Ombarak, Rabee A., Awasthi, Sharda Prasad, Hatanaka, Noritoshi, and Yamasaki, Shinji
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PLASMIDS , *GENES , *ESCHERICHIA coli , *COLISTIN , *MICROBIAL sensitivity tests , *BACTERIAL genetics , *DRUG resistance in microorganisms , *EFFECT of antibiotics on microorganisms - Abstract
The mcr-1 gene in 125 ESBL-producing Gram-negative bacteria obtained from animal products was screened and the location and transferability of the mcr-1 gene were examined. The mcr-1 gene was detected by PCR in one Escherichia coli isolate (RC263) obtained from hard cheese made from raw milk. Antimicrobial susceptibility test showed that the strain RC263 was phenotypically multidrug-resistant with colistin and nine other antimicrobials. Further genetic analysis indicated that this isolate also harboured the bla TEM and bla CTX-M-9 genes. S1-PFGE followed by Southern blotting verified that the mcr-1 gene was located on an approximately 153 kb plasmid. The plasmid was transferred to a recipient E. coli strain by conjugation, suggesting that the mcr-1 gene may spread to other Gram-negative bacteria. In conclusion, ESBL-producing E. coli carrying a transferable plasmid with mcr-1 gene was present in hard cheese in Egypt. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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