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Molecular mechanisms underlying the high mortality of hypervirulent Klebsiella pneumoniae and its effective therapy development
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作者 Qi Xu miaomiao xie +7 位作者 Xiaoxuan Liu Heng Heng Han Wang Chen Yang Edward Wai-Chi Chan Rong Zhang Guan Yang Sheng Chen 《Signal Transduction and Targeted Therapy》 SCIE CSCD 2023年第6期2489-2492,共4页
Dear Editor,Klebsiella pneumoniae(Kp)has become the most important bacterial pathogen causing high mortality rates in clinical patients due to the continuous evolution to several important variants such as carbapenem-... Dear Editor,Klebsiella pneumoniae(Kp)has become the most important bacterial pathogen causing high mortality rates in clinical patients due to the continuous evolution to several important variants such as carbapenem-resistant(CR-Kp),hypervirulent(hvKp)and both CR and hv K.pneumoniae(CR-hvKp).The high mortality caused by clinical hvKp is attributed to the non-response to antibiotic treatment. 展开更多
关键词 MORTALITY CLINICAL attributed
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Intercontinental spread and clonal expansion of ColRNA1 plasmid-bearing Salmonella Corvallis ST1541 strains:a genomic epidemiological study
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作者 Kaichao Chen miaomiao xie +2 位作者 Han Wang Edward Wai-Chi Chan Sheng Chen 《One Health Advances》 2023年第1期198-212,共15页
Salmonella Corvallis ST1541 has recently emerged as a globally disseminated pathogenic strain that often causes severe food-borne infections.Unlike most pandemic serotypes of Salmonella,the ST1541 strains harbored Col... Salmonella Corvallis ST1541 has recently emerged as a globally disseminated pathogenic strain that often causes severe food-borne infections.Unlike most pandemic serotypes of Salmonella,the ST1541 strains harbored ColRNA1 plasmids that contain qnr-like determinants known to be responsible for the increasing incidence of ciprofloxacin-resistant food-borne Salmonella infections.In this study,we conducted a genomic analysis of a global collection of 388 S.Corvallis ST1541 strains collected within a twenty-year period.We investigated the genetic characteristics of plasmid-mediated quinolone resistance(PMQR)plasmids harbored by these S.Corvallis strains,established a mini-mum spanning tree(MST)to determine the temporal and spatial distribution of the top 10 MST clusters,inferred a time-phylogenies for the major sub-lineages and traced the routes of international dissemination of this serotype strains.Bayesian algorithm predicted that UK might be the origin of S.Corvallis strains currently prevalent in various countries.This idea is supported by the observation of the emergence of intercontinental-disseminated clonal strains and extensive transmission of the extensive-drug resistance(XDR)-encoding plasmid pSA663.This study there-fore provides valuable insight into the evolution of globally transmitted S.Corvallis strains and suggests a need to strengthen cooperation between different countries to control the dissemination of these drug-resistant bacteria. 展开更多
关键词 Salmonella enterica serovar Corvallis Intercontinental spread Plasmid-mediated quinolone resistance Animal food Phylodynamic analysis
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