Hao Yingying, Shao Chunhong, Geng Xu, Bai Yuanyuan, Jin Yan, Lu Zhiming
Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China.
Front Microbiol. 2019 Apr 12;10:788. doi: 10.3389/fmicb.2019.00788. eCollection 2019.
We report a -carrying ST405 recovered from the abdominal fluid of a patient in Shandong, China. This strain belonged to the high-risk phylogenetic group D and carried the virulence genes, , and iroN. In addition to , this isolate carried the quinolone resistance gene and extended-spectrum β-lactamase (ESBL) genes and . was located on a 41 Kb IncN2 self-transmissible plasmid. The IncN2 plasmid named as pJN24NDM1 was fully sequenced and analyzed. Genome comparative analysis showed that IncN2 plasmids harboring carbapenem-resistance genes possessed conserved backbones and variable accessory regions. Phylogenetic analysis of 87 IncN plasmids based on orthologous genes indicated that 9 IncN2 plasmids fell into one phylogenetic clade, while 4 IncN3 plasmids were in two phylogenetic clades of the 74 IncN1 plasmids. The presence of IncN2 plasmids harboring in the high-risk clone ST405 raises serious concerns for its potential of dissemination.
我们报告了从中国山东一名患者腹腔积液中分离出的携带NDM-1的ST405菌株。该菌株属于高风险系统发育组D,携带毒力基因hlyA、fyuA和iroN。除了NDM-1,该分离株还携带喹诺酮耐药基因qnrS和超广谱β-内酰胺酶(ESBL)基因blaCTX-M-1和blaTEM-1。NDM-1位于一个41 Kb的IncN2自我传递质粒上。对名为pJN24NDM1的IncN2质粒进行了全序列测定和分析。基因组比较分析表明,携带碳青霉烯耐药基因的IncN2质粒具有保守的主干和可变的辅助区域。基于直系同源基因对87个IncN质粒进行的系统发育分析表明,9个IncN2质粒属于一个系统发育分支,而4个IncN3质粒则分布在74个IncN1质粒的两个系统发育分支中。在高风险克隆ST405菌株中存在携带NDM-1的IncN2质粒,这对其传播潜力引发了严重担忧。