scholarly journals Dissemination of ST101 blaOXA-48 producing Klebsiella pneumoniae at tertiary care setting

2018 ◽  
Vol 12 (06) ◽  
pp. 422-428 ◽  
Author(s):  
Hadir ElMahallawy ◽  
Mai Mahmoud Zafer ◽  
Mohamed Al-Agamy ◽  
Magdy Aly Amin ◽  
Mai Muhammed Mersal ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Genetic Relatedness ◽  
Tertiary Care ◽  
Pcr Amplification ◽  
Beta Lactamases ◽  
Patients With Cancer ◽  
Carbapenem Resistant ◽  
Distinct Sequence ◽  
Study Association ◽  
Relationship Of

Introduction: The worldwide dissemination of the acquired carbapenemases in Gram-negative bacteria is a strongly expressed demand for the emergence of post antibiotic era. The aim of this study was to test the production of carbapenemase by Klebsiella pneumoniae strains isolated from hospitalized cancer patients and to investigate the genetic relationship of carbapenemase producing carbapenem resistant K. pneumoniae using multilocus sequence typing (MLST). Methodology: Antibiotic susceptibility testing and phenotypic testing for extended spectrum b-lactamases (ESBL) and carbapenemases production were performed. PCR amplification of ESBL and carbapenemase genes was performed. MLST was done to detect the genetic relatedness of the isolates. Results: Our data showed all strains were sensitive to colistin. Carba NP test was positive in thirty-one carbapenem resistant K. pneumoniae isolates and 26 out of 34 K. pneumoniae isolates were metallo-beta-lactamases (MBL) positive. All carbapenemase-positive isolates were ESBL CTX-M-1-like positive. blaOXA-48 gene was detected in 25 isolates (80.65%) and 21 isolates (67.75%) produced blaNDM-1 like enzyme. VIM and KPC genes were not identified in this study. Association of blaOXA-48 like and blaNDM-1 like was found in 15 (48.39%) isolates, while the coproduction of OXA-48-like and IMP-1 was revealed in only one K. pneumoniae isolate. MLST revealed ten distinct sequence types (STs). Conclusion: Here we have documented the coexistence of NDM-type and OXA-48-like, and the coproduction of OXA-48-like and IMP in carbapenem resistant K. pneumoniae in patients with cancer. The dominant clone of the OXA-48-like-producing K. pneumoniae isolates from Egypt was ST101 epidemic clone belonging to clonal complex 101, an association that has been reported worldwide. The second most frequent ST was ST383.ST11 was assigned to OXA-48-producing K. pneumoniae.

scholarly journals Resistance phenotype and molecular epidemiology of Carbapenem-resistant Klebsiella pneumoniae isolates in Shanghai

2020 ◽  
Author(s):  
Jue Zhang ◽  
Wenxia Zhang ◽  
Hongyou Chen ◽  
Chen Chen ◽  
Junhao Chen ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Klebsiella Pneumoniae ◽  
Molecular Epidemiology ◽  
Genetic Relatedness ◽  
Control Strategies ◽  
Microdilution Method ◽  
Carbapenem Resistant ◽  
Broth Microdilution Method ◽  
Polymerase Chain ◽  
Relationship Of

Abstract Background: The emergence and wide global spread of carbapenem-resistant Klebsiella pneumoniae (CRKP) isolates are of great concern, and the aim of this study was to investigate drug resistance, molecular epidemiology, and genetic relationship of CRKP isolates from patients in Shanghai, China. Methods: A retrospective study was conducted from April 2018 to July 2019, and a total of 133 CRKP isolates were collected. Antimicrobial susceptibility was determined by VITEK-2 automated microbiology analyzer platform (bioMérieux, France) and the broth microdilution method. Polymerase chain reaction (PCR) assays were used to investigate the presence of drug resistance genes. A modified carbapenem inactivation method (mCIM) was performed to detect carbapenemases. Multilocus sequence typing (MLST) and pulsed-field gel electrophoresis (PFGE) were conducted for genetic relatedness of 50 CRKP isolates selected. Results: Among 670 isolates of K. pneumoniae, 133 (19.85%) strains were identified as carbapenem-resistant K. pneumoniae (CRKP), of which, 76.69% (102/133) strains were isolated from ICUs. All the 133 CRKP isolates were found to be carbapenemase-producers and harbor blaKPC-2 gene. No other carbapenemase genes of blaNDM, blaOXA−48, blaVIM, and blaIMP were detected. Furthermore, β-lactamase genes of blaSHV, blaCTX, and blaTEM were the most common resistance-associated genes among these KPC-2 producing isolates. All the 133 CRKP strains displayed more than 95% of resistance to cephalosporins and carbapenems, except for gentamicin, Trimethoprim-sulfamethoxazole, amikacin, tigecycline and colistin. The most common sequence type was ST11, accounting for 90.0% of the 50 CRKP selected, followed by ST15 (10%). PFGE analysis clustered the 50 KPC-2-producing isolates into seven (A-G) distinct clonal clusters at 85% cut off. Of which, cluster A and G were the two major clusters, accounting for the majority of the strains collected in emergency ICU and neurosurgical ICU. And all the strains of cluster D and E were collected in cardiothoracic surgery ICU, expect for one strain collected in one outpatient. Conclusion: The KPC-2-producing K.pneumoniae belonged to ST11 was widely disseminated in ICUs, and active and effective surveillance of infection control strategies was initiated to limit the spread of CRKP strains.

scholarly journals Extensive outbreak of colistin resistant, carbapenemase (blaOXA-48, blaNDM) producing Klebsiella pneumoniae in a large tertiary care hospital, India

2022 ◽  
Vol 11 (1) ◽  
Author(s):  
Swati Sharma ◽  
Tuhina Banerjee ◽  
Ashok Kumar ◽  
Ghanshyam Yadav ◽  
Sriparna Basu
Keyword(s):  
Klebsiella Pneumoniae ◽  
Neonatal Intensive Care ◽  
Genetic Relatedness ◽  
Tertiary Care ◽  
Hospital Environment ◽  
Care Hospital ◽  
Primary Case ◽  
Large Hospital ◽  
Beta Lactamases ◽  
Sequence Types

Abstract Background Extensive drug resistance in Klebsiella pneumoniae (K. pneumoniae) causing major outbreaks in large hospitals is an emerging challenge. We describe a near fatal outbreak of colistin resistant, carbapenem resistant K. pneumoniae (CRKp) producing metallo beta-lactamases (blaNDM) and blaOXA-48 in the neonatal intensive care unit (NICU) at the background of a larger outbreak involving multiple parts of the hospital and the challenges in its containment. Methods Following identification of an outbreak due to colistin resistant CRKp between April to June 2017 in the NICU, a thorough surveillance of similar cases and the hospital environment was performed to trace the source. All the isolated K. pneumoniae were tested for susceptibility to standard antibiotics by disc diffusion and microbroth dilution methods. Molecular detection of extended spectrum beta lactamases (ESBLs) and carbapenemases (classes A, B, D) genes was done. Enterobacterial repetitive intergenic consensus (ERIC) PCR and multi-locus sequence typing (MLST) was done to determine the genetic relatedness of the isolates. Characteristics of different sequence types were statistically compared (Student’s t-test). Results A total of 45 K. pneumoniae isolates were studied from NICU (14 cases of neonatal sepsis), ICU (18 cases), other wards (7 cases) along with 6 isolates from hospital environment and human colonizers. The primary case was identified in the ICU. All the K. pneumoniae from NICU and 94.4% from the ICU were colistin resistant CRKp. Majority (59.37% and 56.25%) harbored blaSHV/blaCTXM and blaOXA-48 genes, respectively. Two distinct sequence types ST5235 and ST5313 were noted with colistin resistance, distribution within the NICU and mortality as significant attributes of ST5235 (p < 0.05). The outbreak was contained with strengthening of the infection control practices and unintended short duration closure of the hospital. Conclusion Large hospital outbreaks with considerable mortality can be caused by non-dominant clones of colistin resistant CRKp harboring blaOXA-48 and blaNDM carbapenemases in endemic regions. The exact global impact of these sequence types should be further studied to prevent future fatal outbreaks.

Carbapenem-Resistant Enterobacteriaceae Rectal Screening during an Outbreak of New Delhi Metallo-β-Lactamase–Producing Klebsiella pneumoniae at an Acute Care Hospital

2014 ◽  
Vol 35 (4) ◽  
pp. 434-436 ◽  
Author(s):  
Larissa M. Pisney ◽  
M. A. Barron ◽  
E. Kassner ◽  
D. Havens ◽  
N. E. Madinger
Keyword(s):  
Klebsiella Pneumoniae ◽  
Acute Care ◽  
Teaching Hospital ◽  
Tertiary Care ◽  
Acute Care Hospital ◽  
University Teaching ◽  
New Delhi ◽  
Care Hospital ◽  
Carbapenem Resistant ◽  
Carbapenem Resistant Enterobacteriaceae

We describe the results of carbapenem-resistant Enterobacteriaceae (CRE) screening as part of an outbreak investigation of New Delhi metallo-β-lactamase–producing CRE at a tertiary care university teaching hospital. The manual method for CRE screening was useful for detecting patients with asymptomatic CRE carriage but was time-consuming and costly.

Detection of extensively drug-resistant and hypervirulent Klebsiella pneumoniae ST15, ST147, ST377 and ST442 in Iran

2021 ◽  
Author(s):  
Sara Davoudabadi ◽  
Hossein Goudarzi ◽  
Mehdi Goudarzi ◽  
Abdollah Ardebili ◽  
Ebrahim Faghihloo ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Pcr Amplification ◽  
Multidrug Resistant ◽  
Diffusion Method ◽  
Drug Resistant ◽  
Carbapenem Resistant ◽  
Extensively Drug Resistant ◽  
String Test ◽  
Pcr Method ◽  
Extensively Drug Resistance

Abstract In this study, we focused on the emergence of extensively drug-resistant (XDR), pandrug-resistant (PDR), and hypervirulent Klebsiella pneumoniae (hvKP) in Iran. During 2018 to 2020 a total of 52 K. pneumoniae isolates were collected from different clinical specimens. The hvKP isolates were identified by PCR amplification of virulence and capsular serotype-specific genes. Hypermucoviscous K. pneumoniae (hmKP) were identified by string test. Carbapenem-resistant hvKP (CR-hvKP), multidrug-resistant hvKP (MDR-hvKP), extensively drug-resistant hvKP (XDR-hvKP), and pandrug-resistant hvKP (PDR-hvKP) were determined by disc diffusion method, Carba-NP test and PCR method. XDR-hvKP isolates were typed by multilocus sequence typing (MLST). Among all K. pneumoniae isolates 14 (26.9%) were identified as hvKP and 78.6% (11/14) of them were hmKP however, none of the classic K. pneumoniae (cKP) isolates were hmKP. The predominant capsular serotype of hvKP was K2 (42.85%) followed by K1 (35.71%). The prevalence of MDR-hvKP, XDR-hvKP and PDR-hvKP isolates were 6 (42.9%), 5 (35.7%) and 1 (7.1%), respectively. ESBL production was found in 85.7% of hvKP isolates and most of them carried bla TEM gene (78.6%) and 6 isolates (42.9%) were CR-hvKP. Among hvKP isolates, 1 (7.1%), 2 (14.3%), 3 (21.4%), 8 (28.6%), and 11 (78.6%) carried bla NDM-6, bla OXA-48, bla CTX-M, bla SHV, and bla TEM genes, respectively. According to MLST analysis, 2, 1, 1, and 1 XDR-hvKP isolates belonged to ST15, ST377, ST442, and ST147, respectively. The occurrence of such isolates is deeply concerning due to the combination of hypervirulence and extensively drug-resistance or pandrug-resistance.

scholarly journals Derivation of a Model to Guide Empiric Therapy for Carbapenem-Resistant Klebsiella pneumoniae Bloodstream Infection in an Endemic Area

2020 ◽  
Vol 7 (7) ◽  
Author(s):  
Gregory Weston ◽  
Fathima Jahufar ◽  
Nikhil Sharma ◽  
Christopher Su ◽  
Eran Bellin ◽  
...  
Keyword(s):  
Blood Culture ◽  
Klebsiella Pneumoniae ◽  
Bloodstream Infection ◽  
Tertiary Care ◽  
Classification Rule ◽  
Control Group ◽  
Care Hospital ◽  
Clinical Classification ◽  
Carbapenem Resistant ◽  
Good Ability

Abstract Background Appropriate therapy for carbapenem-resistant Klebsiella pneumoniae (CRKP) bloodstream infection (BSI) is often given late in the course of infection, and strategies for identifying CRKP BSI earlier are needed. Methods A retrospective case–control study was performed at a tertiary care hospital, university hospital, and community hospital in Bronx, New York. All participants had a blood culture sent and received an antibiotic within 48 hours of the culture. The case group (n = 163) had a blood culture with CRKP. The control group (n = 178) had a blood culture with carbapenem-susceptible Klebsiella. Data were obtained by electronic or conventional medical record abstraction. A multiple logistic regression model was built to identify associated factors and develop a clinical model for CRKP BSI. Model performance characteristics were estimated using a 10-fold cross-validation analysis. Results A prior nonblood culture with carbapenem-resistant Enterobacteriaceae, skilled nursing facility (SNF) residence, mechanical ventilation, and admission &gt;3 days were strongly associated risk factors. A significant interaction led to development of separate clinical models for subjects admitted &lt;3 days at the time of positive blood culture from those admitted at least 3 days. The derived models had a good ability to discriminate between subjects with and without CRKP BSI. A clinical classification rule to guide therapy can prioritize sensitivity or specificity. Conclusions Prior nonblood cultures showing resistance and exposure to SNF and health care settings are factors associated with carbapenem resistance. The clinical classification rules derived in this work should be validated for ability to guide therapy.

scholarly journals 1189. A Comprehensive Characterization of the Emerging Carbapenem-Resistant Klebsiella pneumoniae Clinical Isolates From a Public Hospital in Lima, Peru

2018 ◽  
Vol 5 (suppl_1) ◽  
pp. S359-S360 ◽  
Author(s):  
Fiorella Krapp ◽  
Catherine Amaro ◽  
Karen Ocampo ◽  
Lizeth Astocondor ◽  
Noemi Hinostroza ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Dna Extraction ◽  
Antibiotic Susceptibility ◽  
Tertiary Care ◽  
Clinical Isolates ◽  
Molecular Characteristics ◽  
Care Hospital ◽  
Carbapenem Resistant ◽  
Carbapenemase Gene ◽  
String Test

Abstract Background In contrast with other countries in Latin America, Peru had been notoriously spared by the global dissemination of carbapenem-resistant Klebsiella pneumoniae (CR-Kp), until recently. Even though, isolated cases of KPC-producing K. pneumoniae had been reported since 2013, it was not until 2016 that the first outbreak of NDM- producing K. pneumoniae was described in Peru. By 2017, rapid emergence of CR-Kp took place in Hospital Cayetano Heredia (HCH), a tertiary care hospital in Lima. Here, we provide a description of clinical, microbiological and molecular characteristics of CR-Kp isolates recovered at HCH. Methods Retrospective review of all CR-Kp clinical isolates recovered at HCH until December 2017. Antibiotic susceptibility data were obtained during routine care (Vitek or disc diffusion) and was assessed using CLSI breakpoints. DNA extraction was performed by heat shock, and PCR was performed to assess carriage of blaNDM gene. String test was performed to detect hypermucoviscosity. Results The first case of CR-Kp in HCH dated from July 2015. Since then, a total of 69 CR-Kp clinical isolates, from 60 patients have been recovered until December 2017. A significant increase in the number of cases was observed during 2017 (Figure 1). The average age of patients was 55. Urinary, and respiratory sources of infection or colonization were the most common ones (35% and 30%, respectively), followed by blood stream (17%) and intraabdominal (10%) infections. Isolate recovery and DNA extraction was achieved in 40 cases. Of these, 15 (38%) had a positive PCR for blaNDM carbapenemase gene (Figure 2). Antibiotic susceptibility testing revealed that amikacin was the most effective antimicrobial with the rest of antimicrobials having extremely high rates of resistance (Figure 3). String test was positive in two of these isolates, suggesting that hypervirulent CR-KP might be emerging in this region. Conclusion An epidemic of CR-Kp has established in our hospital, representing the first one reported in Peru. The different mechanisms of carbapenem resistance found suggest a polyclonal expansion. Amikacin remains the only active antimicrobial within the routinely tested antibiotics, highlighting the need to add other antimicrobials to the routine panel. Disclosures All authors: No reported disclosures.

Outbreak of Carbapenem-Resistant Klebsiella pneumoniae in Puerto Rico Associated with a Novel Carbapenemase Variant

2010 ◽  
Vol 31 (05) ◽  
pp. 476-484 ◽  
Author(s):  
Christopher J. Gregory ◽  
Eloisa Llata ◽  
Nicholas Stine ◽  
Carolyn Gould ◽  
Luis Manuel Santiago ◽  
...  
Keyword(s):  
Risk Factors ◽  
Puerto Rico ◽  
Klebsiella Pneumoniae ◽  
Antimicrobial Agents ◽  
Tertiary Care ◽  
Multivariable Analysis ◽  
Control Measures ◽  
Control Group ◽  
Surveillance Culture ◽  
Carbapenem Resistant

Background.Carbapenem-resistantKlebsiella pneumoniae(CRKP) is resistant to almost all antimicrobial agents, and CRKP infections are associated with substantial morbidity and mortality.Objective.To describe an outbreak of CRKP in Puerto Rico, determine risk factors for CRKP acquisition, and detail the successful measures taken to control the outbreak.Design.Two case-control studies.Setting.A 328-bed tertiary care teaching hospital.Patients.Twenty-six CRKP case patients identified during the outbreak period of February through September 2008, 26 randomly selected uninfected control patients, and 26 randomly selected control patients with carbapenem-susceptibleK. pneumoniae(CSKP) hospitalized during the same period.Methods.We performed active case finding, including retrospective review of the hospital's microbiology database and prospective perirectal surveillance culture sampling in high-risk units. Case patients were compared with each control group while controlling for time at risk. We sequenced theblaKPCgene with polymerase chain reaction for 7 outbreak isolates and subtyped these isolates with pulsed-field gel electrophoresis.Results.In matched, multivariable analysis, the presence of wounds (hazard ratio, 19.0 [95% confidence interval {CI}, 2.5-142.0]) was associated with CRKP compared with noK. pneumoniae.Transfer between units (adjusted odds ratio [OR], 7.5 [95% CI, 1.8-31.1]), surgery (adjusted OR, 4.0 [95% CI, 1.0-15.7]), and wounds (adjusted OR, 4.9 [95% CI, 1.1-21.8]) were independent risk factors for CRKP compared to CSKP. A novelK. pneumoniaecarbapenemase variant (KPC-8) was present in 5 isolates. Implementation of active surveillance for CRKP colonization and cohorting of CRKP patients rapidly controlled the outbreak.Conclusions.Enhanced surveillance for CRKP colonization and intensified infection control measures that include limiting the physical distribution of patients can reduce CRKP transmission during an outbreak.

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