Leclercia adecarboxylata is a Gram-negative bacterium belonging to the Enterobacteriaceae family.To our knowledge,this is the first report of a carbapenem-resistant L.adecarboxylata strain isolated from a healthy newb...Leclercia adecarboxylata is a Gram-negative bacterium belonging to the Enterobacteriaceae family.To our knowledge,this is the first report of a carbapenem-resistant L.adecarboxylata strain isolated from a healthy newborn.The L.adecarboxylata strain isolated in this study carried four plasmids that may serve as reservoirs for antibiotic resistance genes.Plasmids 2 and 4 did not harbor any antimicrobial resistance genes.Plasmid 3 is a novel plasmid containing three resistance genes.The bla IMP gene harbored in the strain was most similar to bla IMP-79 at the nucleotide level,with a similarity of 99.4%(737/741).This case highlights the importance of considering L.adecarboxylata as a potential cause of infections in children.展开更多
BACKGROUND Infective endocarditis(IE) is a rare disease with a high mortality rate.Leclercia adecarboxylata(L.adecarboxylata) is a movable Gram-negative bacillus of enterobacteriaceae,and it can rarely be a pathogen w...BACKGROUND Infective endocarditis(IE) is a rare disease with a high mortality rate.Leclercia adecarboxylata(L.adecarboxylata) is a movable Gram-negative bacillus of enterobacteriaceae,and it can rarely be a pathogen which often affects immunodeficient patients.There are about three cases of immunocompetent patients with monomicrobial L.adecarboxylata infection.There are only three reported cases of IE caused by L.adecarboxylata in the world.The mitral valve is often affected in IE,and the prognosis for IE with mitral valve lesions is often poor.CASE SUMMARY A 51-year-old man was found to have moderate to severe mitral stenosis on echocardiography.He came to our Cardiothoracic Surgery Department for surgical management.A diastolic murmur was heard on auscultation of the heart in the mitral region.On the second day of hospitalisation,he presented with slurred speech,reduced muscle strength in the left limb,and acute cerebral infarction on cranial computed tomography.Surgical treatment was decided to postpone.On the ninth day of admission,the patient developed a sudden high fever and shock and was transferred to the Cardiac Intensive Care Unit,where echocardiogram revealed an anterior mitral valve leaflet vegetation.After empirical anti-infective treatment with vancomycin(1g q12h),an emergency valve replacement was performed.Bacterial culture identified L.adecarboxylata.Antiinfective treatment with piperacillin-tazobactam(4.5g q8h) was added for 4 wk.Follow-up echocardiography showed normal bioprosthetic valve function after mitral valve replacement.CONCLUSION We report the first case of L.adecarboxylata IE in China,and clinicians should pay attention to this pathogen.展开更多
目的分析非脱羧勒克菌血流感染患者的临床特征,为治疗提供参考。方法报道咸阳市第一人民医院1例非脱羧勒克菌血流感染患者的病历资料,通过文献检索英文数据库PubMed、Embase、Springer、Web of Science,中文数据库中国知网、万方、维普...目的分析非脱羧勒克菌血流感染患者的临床特征,为治疗提供参考。方法报道咸阳市第一人民医院1例非脱羧勒克菌血流感染患者的病历资料,通过文献检索英文数据库PubMed、Embase、Springer、Web of Science,中文数据库中国知网、万方、维普、中国生物医学文献服务系统,纳入符合标准的文献18篇,加上该医院1例患者共19例。回顾性分析19例患者的年龄、性别、免疫状态、基础情况、是否入住重症医学科、侵袭性操作、药敏试验、治疗药物以及临床转归,总结特点,为临床治疗提供参考。结果19例非脱羧勒克菌血流感染患者的性别无显著差异,年龄分布为儿童5例,青年人10例,老年人4例;有13例患者免疫功能低下,6例患者免疫功能正常;10例患者存在侵袭性操作(中心静脉置管患者数量最多),9例患者入住重症医学科。非脱羧勒克菌对大多数抗菌药物敏感性较好,产超广谱β内酰胺酶菌株及耐碳青霉烯类菌株也有检出;药物治疗选择主要基于药敏试验结果。有4例为非脱羧勒克菌感染导致死亡,其中儿童3例,成人1例。结论非脱羧勒克菌血流感染主要为免疫功能低下人群,新生儿预后较成人差,中心静脉置管及入住重症医学科的患者应引起临床重视。展开更多
目的探讨1株碳青霉烯类耐药非脱羧勒克菌的耐药机制。方法采用全自动微生物分析仪、基质辅助激光解吸电离飞行时间质谱(MALDI-TOF MS)技术及16S r RNA序列分析进行菌种鉴定;采用全自动微生物分析仪进行常规药物敏感性试验,用E-test条检...目的探讨1株碳青霉烯类耐药非脱羧勒克菌的耐药机制。方法采用全自动微生物分析仪、基质辅助激光解吸电离飞行时间质谱(MALDI-TOF MS)技术及16S r RNA序列分析进行菌种鉴定;采用全自动微生物分析仪进行常规药物敏感性试验,用E-test条检测菌株对亚胺培南的最低抑菌浓度(MIC);改良碳青霉烯酶灭活试验(m CIM法)检测碳青霉烯酶表型;聚合酶链反应(PCR)及测序确定耐药基因型;采用接合试验、S1酶切脉冲场凝胶电泳(S1-PFGE)方法分析其携带质粒的特征。结果临床分离非脱羧勒克菌菌株对亚胺培南、除氨曲南外的其他β内酰胺类抗菌药物及氨基糖苷类耐药,对喹诺酮类和磺胺类药物敏感;接合试验使受体菌E.coli J53获得与非脱羧勒克菌相似的耐药谱。碳青霉烯酶表型试验阳性,PCR扩增及测序表明该菌株同时携带blaNDM-1、blaTEM和aac(6')-Ib,而接合子仅携带blaNDM-1;S1-PFGE示非脱羧勒克菌具有3个质粒。结论非脱羧勒克菌对碳青霉烯类药物耐药为携带blaNDM-1基因造成,该基因可能存在于100 kb左右的可接合传递的质粒上。展开更多
为诊断导致乳牛死亡的病原菌,于病死牛腹腔积液中分离得到1株具有致病性的优势菌株。经16S r DNA检测鉴定为非脱羧勒克菌。动物回归试验中,病牛肺、心外膜、喉头病理变化明显。以15种抗生素进行药敏试验,该非脱羧勒克菌对大环内酯和氨...为诊断导致乳牛死亡的病原菌,于病死牛腹腔积液中分离得到1株具有致病性的优势菌株。经16S r DNA检测鉴定为非脱羧勒克菌。动物回归试验中,病牛肺、心外膜、喉头病理变化明显。以15种抗生素进行药敏试验,该非脱羧勒克菌对大环内酯和氨基糖苷类药物均呈显著耐药。耐药基因检测中大环内酯类耐药基因与氨基糖苷耐药基因均呈显性表达。展开更多
基金supported by Chinese Field Epidemiology Training Programthe National Natural Science Foundation of China [81861138053]。
文摘Leclercia adecarboxylata is a Gram-negative bacterium belonging to the Enterobacteriaceae family.To our knowledge,this is the first report of a carbapenem-resistant L.adecarboxylata strain isolated from a healthy newborn.The L.adecarboxylata strain isolated in this study carried four plasmids that may serve as reservoirs for antibiotic resistance genes.Plasmids 2 and 4 did not harbor any antimicrobial resistance genes.Plasmid 3 is a novel plasmid containing three resistance genes.The bla IMP gene harbored in the strain was most similar to bla IMP-79 at the nucleotide level,with a similarity of 99.4%(737/741).This case highlights the importance of considering L.adecarboxylata as a potential cause of infections in children.
文摘BACKGROUND Infective endocarditis(IE) is a rare disease with a high mortality rate.Leclercia adecarboxylata(L.adecarboxylata) is a movable Gram-negative bacillus of enterobacteriaceae,and it can rarely be a pathogen which often affects immunodeficient patients.There are about three cases of immunocompetent patients with monomicrobial L.adecarboxylata infection.There are only three reported cases of IE caused by L.adecarboxylata in the world.The mitral valve is often affected in IE,and the prognosis for IE with mitral valve lesions is often poor.CASE SUMMARY A 51-year-old man was found to have moderate to severe mitral stenosis on echocardiography.He came to our Cardiothoracic Surgery Department for surgical management.A diastolic murmur was heard on auscultation of the heart in the mitral region.On the second day of hospitalisation,he presented with slurred speech,reduced muscle strength in the left limb,and acute cerebral infarction on cranial computed tomography.Surgical treatment was decided to postpone.On the ninth day of admission,the patient developed a sudden high fever and shock and was transferred to the Cardiac Intensive Care Unit,where echocardiogram revealed an anterior mitral valve leaflet vegetation.After empirical anti-infective treatment with vancomycin(1g q12h),an emergency valve replacement was performed.Bacterial culture identified L.adecarboxylata.Antiinfective treatment with piperacillin-tazobactam(4.5g q8h) was added for 4 wk.Follow-up echocardiography showed normal bioprosthetic valve function after mitral valve replacement.CONCLUSION We report the first case of L.adecarboxylata IE in China,and clinicians should pay attention to this pathogen.
文摘目的分析非脱羧勒克菌血流感染患者的临床特征,为治疗提供参考。方法报道咸阳市第一人民医院1例非脱羧勒克菌血流感染患者的病历资料,通过文献检索英文数据库PubMed、Embase、Springer、Web of Science,中文数据库中国知网、万方、维普、中国生物医学文献服务系统,纳入符合标准的文献18篇,加上该医院1例患者共19例。回顾性分析19例患者的年龄、性别、免疫状态、基础情况、是否入住重症医学科、侵袭性操作、药敏试验、治疗药物以及临床转归,总结特点,为临床治疗提供参考。结果19例非脱羧勒克菌血流感染患者的性别无显著差异,年龄分布为儿童5例,青年人10例,老年人4例;有13例患者免疫功能低下,6例患者免疫功能正常;10例患者存在侵袭性操作(中心静脉置管患者数量最多),9例患者入住重症医学科。非脱羧勒克菌对大多数抗菌药物敏感性较好,产超广谱β内酰胺酶菌株及耐碳青霉烯类菌株也有检出;药物治疗选择主要基于药敏试验结果。有4例为非脱羧勒克菌感染导致死亡,其中儿童3例,成人1例。结论非脱羧勒克菌血流感染主要为免疫功能低下人群,新生儿预后较成人差,中心静脉置管及入住重症医学科的患者应引起临床重视。
文摘为诊断导致乳牛死亡的病原菌,于病死牛腹腔积液中分离得到1株具有致病性的优势菌株。经16S r DNA检测鉴定为非脱羧勒克菌。动物回归试验中,病牛肺、心外膜、喉头病理变化明显。以15种抗生素进行药敏试验,该非脱羧勒克菌对大环内酯和氨基糖苷类药物均呈显著耐药。耐药基因检测中大环内酯类耐药基因与氨基糖苷耐药基因均呈显性表达。
