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Heterogeneous Genetic Location of mcr-1 in Colistin-Resistant Escherichia coli Isolates from Humans and Retail Chicken Meat in Switzerland: Emergence of mcr-1-Carrying IncK2 Plasmids
被引:56
|作者:
Dona, Valentina
[1
,3
]
Bernasconi, Odette J.
[1
,2
]
Pires, Joao
[1
,2
]
Collaud, Alexandra
[3
]
Overesch, Gudrun
[3
]
Ramette, Alban
[1
]
Perreten, Vincent
[3
]
Endimiani, Andrea
[1
]
机构:
[1] Univ Bern, Inst Infect Dis, Bern, Switzerland
[2] Univ Bern, Grad Sch Cellular & Biomed Sci, Bern, Switzerland
[3] Univ Bern, Vetsuisse Fac, Inst Vet Bacteriol, Bern, Switzerland
基金:
瑞士国家科学基金会;
关键词:
colistin;
chromosome;
E;
coli;
mcr-1;
food;
IncK2;
Escherichia coli;
animals;
chromosome organization;
humans;
meat;
plasmids;
POULTRY MEAT;
ENTEROBACTERIACEAE;
D O I:
10.1128/AAC.01245-17
中图分类号:
Q93 [微生物学];
学科分类号:
071005 ;
100705 ;
摘要:
We characterized the genetic environment of mcr-1 in colistin-resistant Escherichia coli strains isolated in Switzerland during 2014 to 2016 from humans (n = 3) and chicken meat (n = 6). Whole-genome and plasmid sequencing identified the mcr-1 gene integrated in IncX4 (of which, one strain carried the mcr-1.2 variant), IncI2, IncHI2, and novel IncK2 plasmids (overall, n = 7), as well as in the bacterial chromosome (n = 2) in single or duplicate copies. Our study supports the easy mobilization of mcr-1 across diverse genetic locations.
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页数:6
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