scholarly journals Genetic Analysis of mcr-1-Carrying Plasmids From Gram-Negative Bacteria in a Dutch Tertiary Care Hospital: Evidence for Intrapatient and Interspecies Transmission Events

2021 ◽  
Vol 12 ◽  
Author(s):  
Nikolaos Strepis ◽  
Anne F. Voor in ’t holt ◽  
Margreet C. Vos ◽  
Willemien H. A. Zandijk ◽  
Astrid P. Heikema ◽  
...  
Keyword(s):  
Medical Center ◽  
Tertiary Care ◽  
Control Measures ◽  
Interspecies Transmission ◽  
Gram Negative Bacteria ◽  
Care Hospital ◽  
Genetic Composition ◽  
Gram Negative ◽  
Infection Control Measures ◽  
Depth Analysis

The role of plasmids in the complex pandemic of antimicrobial resistance is increasingly being recognized. In this respect, multiple mobile colistin resistance (mcr) gene-carrying plasmids have been described. However, the characteristics and epidemiology of these plasmids within local healthcare settings are largely unknown. We retrospectively characterized the genetic composition and epidemiology of plasmids from mcr-1-positive bacterial isolates identified from patients from a large academic hospital in the Netherlands. Clinical Gram-negative bacteria with an MIC > 2 μg/mL for colistin, obtained from patients hospitalized at the Erasmus MC University Medical Center Rotterdam during the years 2010–2018, were screened for presence of the mcr-1 gene. Extracted plasmids from mcr-1-positive isolates were sequenced using a combination of short- and long-read sequencing platforms, characterized by incompatibility type and genetic composition and compared to publicly available mcr-1-carrying plasmid sequences. In 21 isolates from 14 patients, mcr-1 was located on a plasmid. These plasmids were of diverse genetic background involving Inc types IncX4, IncI2(delta), IncHI2, as well as double Inc types IncHI2/IncN and IncHI2/IncQ. mcr-1-carrying plasmids were found in Escherichia coli, Klebsiella pneumoniae, and Kluyvera georgiana, and within the chromosome of an ST147 K. pneumoniae isolate. In depth analysis indicated intrapatient, interpatient, and interspecies transmission events of mcr-1-carrying plasmids. In addition, our results show that the mcr-1 gene resides in a rich environment full of other (mcr-1 negative) plasmids and of many different Inc types, enabling interplasmidal transfer events and facilitating widespread dissemination of the mcr-1 gene. Multiple mcr-1-carrying plasmid transmission events had likely occurred among isolates from hospitalized patients. Recognition and identification of plasmid transmission events within hospitals is necessary in order to design and implement effective infection control measures.

Epidemiology and clinical outcome of ventilator-associated events at a tertiary care hospital from North India

2020 ◽  
pp. 004947552098245
Author(s):  
Pooja Kumari ◽  
Priya Datta ◽  
Satinder Gombar ◽  
Deepak Sharma ◽  
Jagdish Chander
Keyword(s):  
Mechanical Ventilation ◽  
Tertiary Care Hospital ◽  
Late Onset ◽  
Tertiary Care ◽  
Control Measures ◽  
North India ◽  
Ventilator Associated Pneumonia ◽  
Care Hospital ◽  
Infection Control Measures ◽  
Utilisation Rate

The aim of our study was to determine the incidence, microbiological profile, risk factors and outcomes of patients diagnosed with ventilator-associated events in our tertiary care hospital. In this prospective study, intensive care patients put on mechanical ventilation for >48 h were enrolled and monitored daily for ventilator-associated event according to Disease Centre Control guidelines. A ventilator-associated event developed in 33/250 (13.2%); its incidence was 3.5/100 mechanical ventilation days. The device utilisation rate was 0.86, 36.4% of patients had early and 63.6% late-onset ventilator-associated pneumonia whose most common causative pathogen was Acinetobacter sp. (63.6%). Various factors were significantly associated with a ventilator-associated event: male gender, COPD, smoking, >2 underlying diseases, chronic kidney disease and elevated acute physiological and chronic health evaluation II scores. Therefore, stringent implementation of infection control measures is necessary to control ventilator-associated pneumonia in critical care units.

scholarly journals Epidemiology and outcome of sepsis in a tertiary-care hospital in a developing country

2005 ◽  
Vol 134 (2) ◽  
pp. 315-322 ◽  
Author(s):  
M. D. TANRIOVER ◽  
G. S. GUVEN ◽  
D. SEN ◽  
S. UNAL ◽  
O. UZUN
Keyword(s):  
Tertiary Care Hospital ◽  
Tertiary Care ◽  
Clinical Approach ◽  
Gram Negative Bacteria ◽  
Care Hospital ◽  
Gram Negative ◽  
Mortality And Morbidity ◽  
Underlying Diseases ◽  
Major Pathogens ◽  
Very High

Sepsis continues to have a substantial mortality and morbidity despite advances in the diagnosis and management of this condition. We retrospectively analysed hospital charts of patients diagnosed to have sepsis between January 2002 and June 2003. Demographic characteristics of patients, microbiological findings and predictors of survival were evaluated. Sixty-nine sepsis episodes that occurred in 63 patients were analysed. The most common underlying diseases were hypertension, malignancies and diabetes mellitus. Renal insufficiency, respiratory distress and disseminated intravascular coagulation developed in 52·2, 30·4 and 30·4% of the episodes respectively; 47·7% of the blood cultures yielded an organism. Gram-negative bacteria were the predominant microorganisms (65·9%). Fifty-five patients (87·3%) died. Mechanical ventilation and underlying renal disease were significant determinants of mortality. In conclusion, Gram-negative bacteria remain the major pathogens in sepsis. The mortality remains very high, and a change in the clinical approach to the septic patient should be employed to improve the outcome.

scholarly journals Molecular and Epidemiological Characterization of IMP-Type Metallo-β-Lactamase-Producing Enterobacter cloacae in a Large Tertiary Care Hospital in Japan

2014 ◽  
Vol 58 (6) ◽  
pp. 3441-3450 ◽  
Author(s):  
Kayoko Hayakawa ◽  
Tohru Miyoshi-Akiyama ◽  
Teruo Kirikae ◽  
Maki Nagamatsu ◽  
Kayo Shimada ◽  
...  
Keyword(s):  
Hospital Mortality ◽  
Tertiary Care ◽  
Enterobacter Cloacae ◽  
Control Measures ◽  
Care Hospital ◽  
Invasive Procedures ◽  
Content Type ◽  
Infection Control Measures ◽  
Large Tertiary Care ◽  
Close Relationship

ABSTRACTIMP-type metallo-β-lactamase enzymes have been reported in different geographical areas and in various Gram-negative bacteria. However, the risk factors and epidemiology pertaining to IMP-type metallo-β-lactamase-producingEnterobacter cloacae(IMP-producingE. cloacae) have not been systematically evaluated. We conducted a retrospective, matched case-control study of patients from whom IMP-producingE. cloacaeisolates were obtained, in addition to performing thorough molecular analyses of the clinically obtained IMP-producingE. cloacaeisolates. Unique cases with IMP-producingE. cloacaeisolation were included. Patients with IMP-producingE. cloacaewere matched to uninfected controls at a ratio of 1 to 3. Fifteen IMP-producingE. cloacaecases were identified, with five of the isolates being obtained from blood, and they were matched to 45 uninfected controls. All (100%) patients from whom IMP-producingE. cloacaeisolates were obtained had indwelling devices at the time of isolation, compared with one (2.2%) uninfected control. Independent predictors for isolation of IMP-producingE. cloacaewere identified as cephalosporin exposure and invasive procedures within 3 months. Although in-hospital mortality rates were similar between cases and controls (14.3% versus 13.3%), the in-hospital mortality of patients with IMP-producingE. cloacae-caused bacteremia was significantly higher (40%) than the rate in controls. IMP-producingE. cloacaeisolates were frequently positive for other resistance determinants. The MICs of meropenem and imipenem were not elevated; 10 (67%) and 12 (80%) of the 15 IMP-producingE. cloacaeisolates had a MIC of ≤1 μg/ml. A phylogenetic tree showed a close relationship among the IMP-producingE. cloacaesamples. Indwelling devices, exposure to cephalosporin, and a history of invasive procedures were associated with isolation of IMP-producingE. cloacae. Screening for carbapenemase production is important in order to apply appropriate clinical management and infection control measures.

scholarly journals Detection of Extended Spectrum Beta-lactamase (ESBL) Producing Gram Negative Bacteria from Clinical Specimens of Sir Salimullah Medical College and Mitford Hospital.

2017 ◽  
Vol 10 (1) ◽  
pp. 8-12
Author(s):  
Shikha Paul ◽  
Sanya Tahmina Jhora ◽  
Prashanta Prasun Dey ◽  
Bilkis Ara Begum
Keyword(s):  
Tertiary Care ◽  
Gram Negative Bacteria ◽  
Care Hospital ◽  
Beta Lactamase ◽  
Gram Negative ◽  
Clinical Specimens ◽  
Extended Spectrum Beta Lactamase ◽  
Medical College ◽  
Extended Spectrum ◽  
Esbl Producers

Detection of Extended spectrum beta lactamase (ESBL) enzyme producing bacteria in hospital settings is vital as ESBL genes are transmissible. This study was carried out to determine the distribution of ESBL producing gram negative isolates at a tertiary care hospital in Dhaka city which deals with the patients hailing from relatively low socioeconomic status.Onehundred and twenty four gram negative bacteria isolated from different clinical specimens from outpatient and inpatient departments of Sir Salimullah Medical College and Mitford Hospital (SSMC & MH) were tested for ESBL by E test ESBL method in the department of microbiology of Sir Salimullah medical college (SSMC) from March 2013 to August 2013.Out of 124 gram negative bacteria 69 (55.65%) were positive for ESBL. Among the ESBL producers, Esch.coli was the highest (46.38%) which was followed by Serratia spp (11.59%), Enterobacter spp (10.14%), Proteus spp, (8.70%), Acinetobacter spp.(7.24%) and Klebsiella spp.(5.79%). Out of 32 Esch.coli isolated from outpatient department, 10 (31.25%) were positive for ESBL. On the other hand out of 27 Esch. coli isolated from inpatient department, 22 (81.48%) were positive for ESBL. The difference was statistically significant (p<0.001).So the present study reveals that the distribution of ESBL producers is more among the hospitalized patients than the patients of the community.Bangladesh J Med Microbiol 2016; 10 (1): 8-12

scholarly journals Prevalence of Carbapenem Resistance among Gram-Negative Bacteria in a Tertiary Care Hospital in North-East India

2014 ◽  
Vol 13 (12) ◽  
pp. 56-60 ◽  
Author(s):  
Dr. Ph. Henkhoneng Mate ◽  
◽  
Dr. Kh Sulochana Devi ◽  
Dr. Ksh Mamta Devi ◽  
Dr. San Damrolien ◽  
...  
Keyword(s):  
Tertiary Care Hospital ◽  
Tertiary Care ◽  
Carbapenem Resistance ◽  
Gram Negative Bacteria ◽  
Care Hospital ◽  
Gram Negative ◽  
North East India ◽  
North East

scholarly journals A high prevalence of multi-drug resistant Gram-negative bacilli in a Nepali tertiary care hospital and associated widespread distribution of Extended-Spectrum Beta-Lactamase (ESBL) and carbapenemase-encoding genes

2020 ◽  
Vol 19 (1) ◽  
Author(s):  
Sulochana Manandhar ◽  
Raphael M. Zellweger ◽  
Nhukesh Maharjan ◽  
Sabina Dongol ◽  
Krishna G. Prajapati ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Tertiary Care ◽  
Multi Drug Resistance ◽  
Gram Negative Bacteria ◽  
Care Hospital ◽  
Global Public Health ◽  
Gram Negative ◽  
E Coli ◽  
Extended Spectrum ◽  
High Prevalence

Abstract Background Multi-drug resistance (MDR) and extensive-drug resistance (XDR) associated with extended-spectrum beta-lactamases (ESBLs) and carbapenemases in Gram-negative bacteria are global public health concerns. Data on circulating antimicrobial resistance (AMR) genes in Gram-negative bacteria and their correlation with MDR and ESBL phenotypes from Nepal is scarce. Methods A retrospective study was performed investigating the distribution of ESBL and carbapenemase genes and their potential association with ESBL and MDR phenotypes in E. coli, Klebsiella spp., Enterobacter spp. and Acinetobacter spp. isolated in a major tertiary hospital in Kathmandu, Nepal, between 2012 and 2018. Results During this period, the hospital isolated 719 E. coli, 532 Klebsiella spp., 520 Enterobacter spp. and 382 Acinetobacter spp.; 1955/2153 (90.1%) of isolates were MDR and half (1080/2153) were ESBL producers. Upon PCR amplification, blaTEM (1281/1771; 72%), blaCTXM-1 (930/1771; 53%) and blaCTXM-8 (419/1771; 24%) were the most prevalent ESBL genes in the enteric bacilli. BlaOXA and blaOXA-51 were the most common blaOXA family genes in the enteric bacilli (918/1771; 25%) and Acinetobacter spp. (218/382; 57%) respectively. Sixteen percent (342/2153) of all isolates and 20% (357/1771) of enteric bacilli harboured blaNDM-1 and blaKPC carbapenemase genes respectively. Of enteric bacilli, Enterobacter spp. was the most frequently positive for blaKPC gene (201/337; 60%). The presence of each blaCTX-M and blaOXA were significantly associated with non-susceptibility to third generation cephalosporins (OR 14.7, p < 0.001 and OR 2.3, p < 0.05, respectively).The presence of each blaTEM, blaCTXM and blaOXA family genes were significantly associated with ESBL positivity (OR 2.96, p < 0.001; OR 14.2, p < 0.001 and OR 1.3, p < 0.05 respectively) and being MDR (OR 1.96, p < 0.001; OR 5.9, p < 0.001 and OR 2.3, p < 0.001 respectively). Conclusions This study documents an alarming level of AMR with high prevalence of MDR ESBL- and carbapenemase-positive ESKAPE microorganisms in our clinical setting. These data suggest a scenario where the clinical management of infected patients is increasingly difficult and requires the use of last-resort antimicrobials, which in turn is likely to intensify the magnitude of global AMR crisis.

Sign in / Sign up

Export Citation Format

Share Document