Title |
First identification of an IMI-1 carbapenemase-producing colistin-resistant Enterobactercloacae in China
|
---|---|
Published in |
Annals of Clinical Microbiology and Antimicrobials, November 2015
|
DOI | 10.1186/s12941-015-0112-2 |
Pubmed ID | |
Authors |
Liang Huang, Xiaohui Wang, Yu Feng, Yi Xie, Liping Xie, Zhiyong Zong |
Abstract |
Carbapenem resistance among the Enterobacteriaceae is a serious healthcare challenge. bla IMI is a carbapenemase gene mediating resistance to carbapenems but has not been commonly found. A bla IMI-carrying Enterobacter cloacae, which was also resistant to colistin, is reported here. E. cloacae strain WCHECl-1060 was recovered from a blood sample of a leukemia patient, who was not previously exposed to colistin. Strain WCHECl-1060 belongs to a new sequence type, ST410, and was resistant to carbapenems and colistin but was susceptible to third-generation cephalosporins. A new allelic variant of bla IMI-1, which has two silent mutations compared to the original bla IMI-1 variant, was found in strain WCHECl-1060. Conjugation and transformation experiments failed to transfer bla IMI-1, suggesting a likely chromosome origin. To our knowledge, this is the first report of an IMI-1 carbapenemase-producing colistin-resistant E. cloacae in China. Microbiological laboratories should be aware of the unusual carbapenem-resistant but third-generation cephalosporin-susceptible profiles of these IMI-producing isolates. The trend of colistin resistance among the Enterobacteriaceae should be also monitored. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
United Kingdom | 1 | 20% |
United States | 1 | 20% |
Venezuela, Bolivarian Republic of | 1 | 20% |
Unknown | 2 | 40% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 2 | 40% |
Practitioners (doctors, other healthcare professionals) | 1 | 20% |
Scientists | 1 | 20% |
Science communicators (journalists, bloggers, editors) | 1 | 20% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Paraguay | 1 | 2% |
Unknown | 44 | 98% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 9 | 20% |
Student > Master | 6 | 13% |
Student > Ph. D. Student | 4 | 9% |
Student > Postgraduate | 4 | 9% |
Other | 4 | 9% |
Other | 7 | 16% |
Unknown | 11 | 24% |
Readers by discipline | Count | As % |
---|---|---|
Medicine and Dentistry | 9 | 20% |
Agricultural and Biological Sciences | 8 | 18% |
Biochemistry, Genetics and Molecular Biology | 7 | 16% |
Immunology and Microbiology | 2 | 4% |
Pharmacology, Toxicology and Pharmaceutical Science | 1 | 2% |
Other | 5 | 11% |
Unknown | 13 | 29% |