Abstract
Background. mcr-1-mediated colistin resistance in Enterobacteriaceae is concerning, as colistin is used in treating multidrug- resistant Enterobacteriaceae infections. We identified trends in human fecal mcr-1-positivity rates and colonization with mcr-1- positive, third-generation cephalosporin-resistant (3GC-R) Enterobacteriaceae in Guangzhou, China, and investigated the genetic contexts of mcr-1 in mcr-1-positive 3GC-R strains. Methods. Fecal samples were collected from in-/out-patients submitting specimens to 3 hospitals (2011-2016). mcr-1 carriage trends were assessed using iterative sequential regression. A subset of mcr-1-positive isolates was sequenced (whole-genome sequencing [WGS], Illumina), and genetic contexts (flanking regions, plasmids) of mcr-1 were characterized. Results. Of 8022 fecal samples collected, 497 (6.2%) were mcr-1 positive, and 182 (2.3%) harbored mcr-1-positive 3GC-R Enterobacteriaceae. We observed marked increases in mcr-1 (0% [April 2011] to 31% [March 2016]) and more recent (since January 2014; 0% [April 2011] to 15% [March 2016]) increases in human colonization with mcr-1-positive 3GC-R Enterobacteriaceae (P < .001). mcr-1-positive 3GC-R isolates were commonly multidrug resistant. WGS of mcr-1-positive 3GC-R isolates (70 Escherichia coli, 3 Klebsiella pneumoniae) demonstrated bacterial strain diversity; mcr-1 in association with common plasmid backbones (IncI, IncHI2/HI2A, IncX4) and sometimes in multiple plasmids; frequent mcr-1 chromosomal integration; and high mobility of the mcr-1-associated insertion sequence ISApl1. Sequence data were consistent with plasmid spread among animal/ human reservoirs. Conclusions. The high prevalence of mcr-1 in multidrug-resistant E. coli colonizing humans is a clinical threat; diverse genetic mechanisms (strains/plasmids/insertion sequences) have contributed to the dissemination of mcr-1, and will facilitate its persistence.
| Original language | English |
|---|---|
| Pages (from-to) | 676-685 |
| Number of pages | 10 |
| Journal | Clinical Infectious Diseases |
| Volume | 66 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 03-2018 |
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All Science Journal Classification (ASJC) codes
- Microbiology (medical)
- Infectious Diseases
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High rates of human fecal carriage of mcr-1-positive multidrug-resistant enterobacteriaceae emerge in China in association with successful plasmid families. / Zhong, Lan Lan; Phan, Hang T.T.; Shen, Cong; Vihta, Karina Doris; Sheppard, Anna E.; Huang, Xi; Zeng, Kun Jiao; Li, Hong Yu; Zhang, Xue Fei; Patil, Sandip; Crook, Derrick W.; Walker, A. Sarah; Xing, Yong; Lin, Jia Lin; Feng, Lian Qiang; Doi, Yohei; Xia, Yong; Stoesser, Nicole; Tian, Guo Bao.
In: Clinical Infectious Diseases, Vol. 66, No. 5, 03.2018, p. 676-685.Research output: Contribution to journal › Article
TY - JOUR
T1 - High rates of human fecal carriage of mcr-1-positive multidrug-resistant enterobacteriaceae emerge in China in association with successful plasmid families
AU - Zhong, Lan Lan
AU - Phan, Hang T.T.
AU - Shen, Cong
AU - Vihta, Karina Doris
AU - Sheppard, Anna E.
AU - Huang, Xi
AU - Zeng, Kun Jiao
AU - Li, Hong Yu
AU - Zhang, Xue Fei
AU - Patil, Sandip
AU - Crook, Derrick W.
AU - Walker, A. Sarah
AU - Xing, Yong
AU - Lin, Jia Lin
AU - Feng, Lian Qiang
AU - Doi, Yohei
AU - Xia, Yong
AU - Stoesser, Nicole
AU - Tian, Guo Bao
PY - 2018/3
Y1 - 2018/3
N2 - Background. mcr-1-mediated colistin resistance in Enterobacteriaceae is concerning, as colistin is used in treating multidrug- resistant Enterobacteriaceae infections. We identified trends in human fecal mcr-1-positivity rates and colonization with mcr-1- positive, third-generation cephalosporin-resistant (3GC-R) Enterobacteriaceae in Guangzhou, China, and investigated the genetic contexts of mcr-1 in mcr-1-positive 3GC-R strains. Methods. Fecal samples were collected from in-/out-patients submitting specimens to 3 hospitals (2011-2016). mcr-1 carriage trends were assessed using iterative sequential regression. A subset of mcr-1-positive isolates was sequenced (whole-genome sequencing [WGS], Illumina), and genetic contexts (flanking regions, plasmids) of mcr-1 were characterized. Results. Of 8022 fecal samples collected, 497 (6.2%) were mcr-1 positive, and 182 (2.3%) harbored mcr-1-positive 3GC-R Enterobacteriaceae. We observed marked increases in mcr-1 (0% [April 2011] to 31% [March 2016]) and more recent (since January 2014; 0% [April 2011] to 15% [March 2016]) increases in human colonization with mcr-1-positive 3GC-R Enterobacteriaceae (P < .001). mcr-1-positive 3GC-R isolates were commonly multidrug resistant. WGS of mcr-1-positive 3GC-R isolates (70 Escherichia coli, 3 Klebsiella pneumoniae) demonstrated bacterial strain diversity; mcr-1 in association with common plasmid backbones (IncI, IncHI2/HI2A, IncX4) and sometimes in multiple plasmids; frequent mcr-1 chromosomal integration; and high mobility of the mcr-1-associated insertion sequence ISApl1. Sequence data were consistent with plasmid spread among animal/ human reservoirs. Conclusions. The high prevalence of mcr-1 in multidrug-resistant E. coli colonizing humans is a clinical threat; diverse genetic mechanisms (strains/plasmids/insertion sequences) have contributed to the dissemination of mcr-1, and will facilitate its persistence.
AB - Background. mcr-1-mediated colistin resistance in Enterobacteriaceae is concerning, as colistin is used in treating multidrug- resistant Enterobacteriaceae infections. We identified trends in human fecal mcr-1-positivity rates and colonization with mcr-1- positive, third-generation cephalosporin-resistant (3GC-R) Enterobacteriaceae in Guangzhou, China, and investigated the genetic contexts of mcr-1 in mcr-1-positive 3GC-R strains. Methods. Fecal samples were collected from in-/out-patients submitting specimens to 3 hospitals (2011-2016). mcr-1 carriage trends were assessed using iterative sequential regression. A subset of mcr-1-positive isolates was sequenced (whole-genome sequencing [WGS], Illumina), and genetic contexts (flanking regions, plasmids) of mcr-1 were characterized. Results. Of 8022 fecal samples collected, 497 (6.2%) were mcr-1 positive, and 182 (2.3%) harbored mcr-1-positive 3GC-R Enterobacteriaceae. We observed marked increases in mcr-1 (0% [April 2011] to 31% [March 2016]) and more recent (since January 2014; 0% [April 2011] to 15% [March 2016]) increases in human colonization with mcr-1-positive 3GC-R Enterobacteriaceae (P < .001). mcr-1-positive 3GC-R isolates were commonly multidrug resistant. WGS of mcr-1-positive 3GC-R isolates (70 Escherichia coli, 3 Klebsiella pneumoniae) demonstrated bacterial strain diversity; mcr-1 in association with common plasmid backbones (IncI, IncHI2/HI2A, IncX4) and sometimes in multiple plasmids; frequent mcr-1 chromosomal integration; and high mobility of the mcr-1-associated insertion sequence ISApl1. Sequence data were consistent with plasmid spread among animal/ human reservoirs. Conclusions. The high prevalence of mcr-1 in multidrug-resistant E. coli colonizing humans is a clinical threat; diverse genetic mechanisms (strains/plasmids/insertion sequences) have contributed to the dissemination of mcr-1, and will facilitate its persistence.
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U2 - 10.1093/cid/cix885
DO - 10.1093/cid/cix885
M3 - Article
C2 - 29040419
AN - SCOPUS:85044184505
VL - 66
SP - 676
EP - 685
JO - Clinical Infectious Diseases
JF - Clinical Infectious Diseases
SN - 1058-4838
IS - 5
ER -