scholarly journals Prevalence of Colistin-Resistant, Carbapenem-Hydrolyzing Proteobacteria in Hospital Water Bodies and Out-Falls of West Bengal, India

2020 ◽  
Vol 17 (3) ◽  
pp. 1007
Author(s):  
Taniya Bardhan ◽  
Madhurima Chakraborty ◽  
Bornali Bhattacharjee
Keyword(s):  
Escherichia Coli ◽  
Bacterial Infections ◽  
West Bengal ◽  
Environmental Water ◽  
Multidrug Resistant ◽  
P Value ◽  
Hospital Wastewater ◽  
E Coli ◽  
Predominant Species ◽  
Carbapenemase Gene

Indiscriminate use of antibiotics has resulted in a catastrophic increase in the levels of antibiotic resistance in India. Hospitals treat critical bacterial infections and thus can serve as reservoirs of multidrug resistant (MDR) bacteria. Hence, this study was conducted to gauge the prevalence patterns of MDR bacteria in hospital wastewater. Water samples collected from 11 hospitals and 4 environmental sources belonging to 5 most-densely populated districts of West Bengal, India were grown on MacConkey and Eosin Methylene Blue agar. A total of 84 (hospital-associated = 70, environmental water sources = 14) isolates were characterized. The predominant species found in water from hospital-associated areas (HAA) were Acinetobacter baumannii (22.9%), Escherichia coli (28.6 %), and Klebsiella pneumoniae (25.7%). Greater than 75% of the HAA isolates were found to be mcr-1 gene negative and colistinresistant. Meropenem non-susceptibility was also high among the HAA isolates at 58.6%, with the presence of the carbapenemase gene and blaNDM in 67.1% of the non-susceptible isolates. Among the three predominant species, significantly higher numbers of E. coli isolates were found to be non-susceptible to meropenem ((80%), p-value = 0.00432) and amikacin (AK (90%), p-value = 0.00037). This study provides evidence for the presence of high numbers of colistin-resistant and carbapenem-hydrolyzing Proteobacteriain hospital wastewater.

scholarly journals Three-Year Trend in Escherichia coli Antimicrobial Resistance among Children’s Urine Cultures in an Italian Metropolitan Area

Children ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 597
Author(s):  
Luca Pierantoni ◽  
Laura Andreozzi ◽  
Simone Ambretti ◽  
Arianna Dondi ◽  
Carlotta Biagi ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Metropolitan Area ◽  
Bacterial Infections ◽  
Asymptomatic Bacteriuria ◽  
Multidrug Resistant ◽  
Resistance Rate ◽  
First Line ◽  
E Coli ◽  
First Line Therapy ◽  
Tract Infections

Urinary tract infections (UTIs) are among the most common bacterial infections in children, and Escherichia coli is the main pathogen responsible. Several guidelines, including the recently updated Italian guidelines, recommend amoxicillin-clavulanic acid (AMC) as a first-line antibiotic therapy in children with febrile UTIs. Given the current increasing rates of antibiotic resistance worldwide, this study aimed to investigate the three-year trend in the resistance rate of E. coli isolated from pediatric urine cultures (UCs) in a metropolitan area of northern Italy. We conducted a retrospective review of E. coli-positive, non-repetitive UCs collected in children aged from 1 month to 14 years, regardless of a diagnosis of UTI, catheter colonization, urine contamination, or asymptomatic bacteriuria. During the study period, the rate of resistance to AMC significantly increased from 17.6% to 40.2% (p < 0.001). Ciprofloxacin doubled its resistance rate from 9.1% to 16.3% (p = 0.007). The prevalence of multidrug-resistant E. coli rose from 3.9% to 9.2% (p = 0.015). The rate of resistance to other considered antibiotics remained stable, as did the prevalence of extended spectrum beta-lactamases and extensively resistant E. coli among isolates. These findings call into question the use of AMC as a first-line therapy for pediatric UTIs in our population, despite the indications of recent Italian guidelines.

scholarly journals Risk Factors and Prevalence of mcr-1-Positive Escherichia coli in Fecal Carriages Among Community Children in Southern Taiwan

2021 ◽  
Vol 12 ◽  
Author(s):  
Pin-Chieh Wu ◽  
Ming-Fang Cheng ◽  
Wan-Ling Chen ◽  
Wan-Yu Hung ◽  
Jiun-Ling Wang ◽  
...  
Keyword(s):  
Risk Factors ◽  
Escherichia Coli ◽  
Bacterial Infections ◽  
Medical Center ◽  
Positive Association ◽  
Multidrug Resistant ◽  
E Coli ◽  
Stool Samples ◽  
Southern Taiwan ◽  
Sequence Types

Colistin is the last resort antimicrobial for treating multidrug-resistant gram-negative bacterial infections. The plasmid-mediated colistin resistance gene, mcr-1, crucially influences colistin’s resistance transmission. Human fecal carriages of mcr-1-positive Escherichia coli (E. coli) were detected in many regions worldwide; however, only a few studies have focused on children. Therefore, we identified the prevalence and risk factors of mcr-1-positive E. coli in fecal carriages among community children in Southern Taiwan. In this study, 510 stool samples were collected from April 2016 to August 2019 from the pediatric department at a medical center in Southern Taiwan. These samples were collected within 3 days after admission and were all screened for the presence of the mcr-1 gene. Diet habits, travel history, pet contact, and medical history were also obtained from participants to analyze the risk factors of their fecal carriages to mcr-1-positive E. coli. Antimicrobial susceptibility testing was determined using the VITEK 2 system and the broth microdilution test. Twelve mcr-1-positive E. coli. were isolated from 2.4% of the fecal samples. Through multivariate analysis, frequent chicken consumption (at least 3 times per week) had a significantly positive association with the presence of mcr-1-positive E. coli in fecal carriages (adjust odds ratio 6.60, 95% confidence interval1.58– 27.62, p = 0.033). Additionally, multidrug resistance was more common in mcr-1-positive E. coli. (75.0% vs. 39.5%, p = 0.031) than in non-mcr-1-positive Escherichia coli. Furthermore, the percentage of extraintestinal pathogenic E. coli in mcr-1-positive isolates was 83.3%. Some multi-locus sequence types in our mcr-1-positive E. coli were also similar to those isolated from food animals in the literature. The prevalence of fecal carriages of mcr-1-positive E. coli was low among community children in Southern Taiwan. Our data shows that chicken consumption with a higher frequency increases the risk of mcr-1-positive E. coli. in fecal carriages.

scholarly journals Transcriptome changes and polymyxin resistance of acid-adapted Escherichia coli O157:H7 ATCC 43889

Gut Pathogens ◽  
2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Daekeun Hwang ◽  
Seung Min Kim ◽  
Hyun Jung Kim
Keyword(s):  
Escherichia Coli ◽  
Acid Treatment ◽  
Bacterial Infections ◽  
Acid Tolerance ◽  
Polymyxin B ◽  
Multidrug Resistant ◽  
Health Concern ◽  
E Coli ◽  
Tolerance Response ◽  
Acid Tolerant

Abstract Background Acid treatment is commonly used for controlling or killing pathogenic microorganisms on medical devices and environments; however, inadequate acid treatment may cause acid tolerance response (ATR) and offer cross-protection against environmental stresses, including antimicrobials. This study aimed to characterise an Escherichia coli strain that can survive in the acidic gastrointestinal environment. Results We developed an acid-tolerant E. coli O157:H7 ATCC 43889 (ATCC 43889) strain that can survive at pH 2.75 via cell adaptation in low pH conditions. We also performed RNA sequencing and qRT-PCR to compare differentially expressed transcripts between acid-adapted and non-adapted cells. Genes related to stress resistance, including kdpA and bshA were upregulated in the acid-adapted ATCC 43889 strain. Furthermore, the polymyxin resistance gene arnA was upregulated in the acid-adapted cells, and resistance against polymyxin B and colistin (polymyxin E) was observed. As polymyxins are important antibiotics, effective against multidrug-resistant gram-negative bacterial infections, the emergence of polymyxin resistance in acid-adapted E. coli is a serious public health concern. Conclusion The transcriptomic and phenotypic changes analysed in this study during the adaptation of E. coli to acid environments can provide useful information for developing intervention technologies and mitigating the risk associated with the emergence and spread of antimicrobial resistance.

scholarly journals Analysis of the Resistome of a Multidrug-Resistant NDM-1-Producing Escherichia coli Strain by High-Throughput Genome Sequencing

2011 ◽  
Vol 55 (9) ◽  
pp. 4224-4229 ◽  
Author(s):  
Laurent Poirel ◽  
Rémy A. Bonnin ◽  
Patrice Nordmann
Keyword(s):  
Escherichia Coli ◽  
Genome Sequencing ◽  
High Throughput ◽  
Multidrug Resistant ◽  
Replicase Gene ◽  
Content Type ◽  
E Coli ◽  
Resistance Determinants ◽  
16S Rna ◽  
Carbapenemase Gene

ABSTRACTThe resistome of the multidrug-resistantEscherichia colistrain 271 carrying the plasmid-mediatedblaNDM-1carbapenemase gene was analyzed by high-throughput genome sequencing. The p271A plasmid carrying theblaNDM-1gene was 35.9 kb in size and possessed an IncN-type backbone that harbored a novel replicase gene. Acquisition of theblaNDM-1gene on plasmid p271A had been likely the result of a cointegration event involving the transposase of Tn5403. The expression ofblaNDM-1was associated with the insertion sequence ISAba125likely originating fromAcinetobacter baumannii. E. coli271 accumulated multiple resistance determinants, including five β-lactamase genes (comprising the extended-spectrum β-lactamase CTX-M-15), two 16S RNA methylase ArmA- and RmtB-encoding genes, and theqepAgene encoding an efflux pump involved in resistance to fluoroquinolones. These resistance genes were located on three additional plasmids, of 160 kb (IncA/C), 130 kb (IncF), and 110 kb (IncI1). In addition, several chromosomally encoded resistance determinants were identified, such as topoisomerase mutations, porin modifications and truncations, and the intrinsicampCgene ofE. colithat was weakly expressed. The multidrug resistance pattern observed forE. coli271 was therefore the result of combined chromosome- and plasmid-encoded mechanisms.

scholarly journals Virulence and plasmidic resistance determinants of Escherichia coli isolated from municipal and hospital wastewater treatment plants

2014 ◽  
Vol 13 (2) ◽  
pp. 311-318 ◽  
Author(s):  
Vera Calhau ◽  
Catarina Mendes ◽  
Angelina Pena ◽  
Nuno Mendonça ◽  
Gabriela Jorge Da Silva
Keyword(s):  
Escherichia Coli ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Multidrug Resistant ◽  
Quinolone Resistance ◽  
Diffusion Method ◽  
Resistant Bacteria ◽  
Hospital Wastewater ◽  
Aminoglycoside Resistance ◽  
E Coli

Escherichia coli is simultaneously an indicator of water contamination and a human pathogen. This study aimed to characterize the virulence and resistance of E. coli from municipal and hospital wastewater treatment plants (WWTPs) in central Portugal. From a total of 193 isolates showing reduced susceptibility to cefotaxime and/or nalidixic acid, 20 E. coli with genetically distinct fingerprint profiles were selected and characterized. Resistance to antimicrobials was determined using the disc diffusion method. Extended spectrum β-lactamase and plasmid-mediated quinolone resistance genes, phylogroups, pathogenicity islands (PAIs) and virulence genes were screened by polymerase chain reaction (PCR). CTX-M producers were typed by multilocus sequence typing. Resistance to beta-lactams was associated with the presence of blaTEM,blaSHV, blaCTX-M-15 and blaCTX-M-32. Plasmid-mediated quinolone resistance was associated with qnrA, qnrS and aac(6′)-Ib-cr. Aminoglycoside resistance and multidrug-resistant phenotypes were also detected. PAI IV536, PAI IICFT073, PAI II536 and PAI ICFT073, and uropathogenic genes iutA, papAH and sfa/foc were detected. With regard to the clinical ST131 clone, it carried blaCTX-M-15, blaTEM-type, qnrS and aac(6′)-lb-cr; IncF and IncP plasmids, and virulence factors PAI IV536, PAI ICFT073, PAI IICFT073, iutA, sfa/foc and papAH were identified in the effluent of a hospital plant. WWTPs contribute to the dissemination of virulent and resistant bacteria in water ecosystems, constituting an environmental and public health risk.

scholarly journals The Effects of β-Lactam Antibiotics on Surface Modifications of Multidrug-Resistant Escherichia coli: A Multiscale Approach

2019 ◽  
Vol 25 (1) ◽  
pp. 135-150 ◽  
Author(s):  
Samuel C. Uzoechi ◽  
Nehal I. Abu-Lail
Keyword(s):  
Escherichia Coli ◽  
Biofilm Formation ◽  
Bacterial Infections ◽  
Treatment Strategies ◽  
Multidrug Resistant ◽  
Multiscale Approach ◽  
Bacterial Cells ◽  
Adhesion Forces ◽  
E Coli ◽  
Resistant Strains

AbstractPossible multidrug-resistant (MDR) mechanisms of four resistant strains of Escherichia coli to a model β-lactam, ampicillin, were investigated using contact angle measurements of wettability, crystal violet assays of permeability, biofilm formation, fluorescence imaging, and nanoscale analyses of dimensions, adherence, and roughness. Upon exposure to ampicillin, one of the resistant strains, E. coli A5, changed its phenotype from elliptical to spherical, maintained its roughness and biofilm formation abilities, decreased its length and surface area, maintained its cell wall integrity, increased its hydrophobicity, and decreased its nanoscale adhesion to a model surface of silicon nitride. Such modifications are suggested to allow these cells to conserve energy during metabolic dormancy. In comparison, resistant strains E. coli D4, A9, and H5 elongated their cells, increased their roughness, increased their nanoscale adhesion forces, became more hydrophilic, and increased their biofilm formation upon exposure to ampicillin. These results suggest that these strains resisted ampicillin through biofilm formation that possibly introduces diffusion limitations to antibiotics. Investigations of how MDR bacterial cells modify their surfaces in response to antibiotics can guide research efforts aimed at designing more effective antibiotics and new treatment strategies for MDR bacterial infections.

scholarly journals Multilocus Variable-Number Tandem-Repeat Analysis for Genotyping of Escherichia coli Strains Isolated from Hospital Wastewater, Tehran, Iran

2020 ◽  
Author(s):  
Omid FARAHANI ◽  
Reza RANJBAR ◽  
Sahar HONARMAND JAHROMY ◽  
Bahareh ARABZADEH
Keyword(s):  
Escherichia Coli ◽  
Tandem Repeat ◽  
Bacterial Infections ◽  
Minimum Spanning Tree ◽  
Variable Number Tandem Repeat ◽  
Variable Number ◽  
Hospital Wastewater ◽  
E Coli ◽  
Repeat Analysis ◽  
Hospital Wastewaters

Background: Escherichia coli is one of the most frequent causes of many common bacterial infections. As a potential reservoir, hospital wastewater is considered for the dissemination of bacterial pathogens such as E. coli. Therefore, research on hospital waste’s bacteria by low-cost, rapid and easy molecular typing methods such as multilocus variable-number tandem-repeat analysis (MLVA) can be helpful for the study of epidemics. Methods: E. coli strains were isolated from hospital wastewater sources in Tehran, Iran, over a 24-month sampling period (Jun 2014- Jun 2016) and identified by standard bacteriological methods. The diversity of repeated sequences of seven variable-number tandem-repeat (VNTR) loci was studied by MLVA method base on polymerase chain reaction (PCR). Results: Overall, 80 E. coli isolates were discriminated into 51 different genotypes. Analysis of the MLVA profiles using a minimum spanning tree (MST) algorithm showed two clonal complexes with 71 isolates and only nine isolates were stayed out of clonal complexes in the form of a singleton. High genotypic diversity was seen among E. coli strains isolated from hospital wastewaters; however, a large number of isolates showed a close genetic relationship. Conclusion: MLVA showed to be a rapid, inexpensive and useful tool for the analysis of the phylogenetic relationships between E. coli strains under the study

scholarly journals Antibiotic Susceptibility Pattern of Escherichia coli Isolated from Various Clinical Samples in Duhok City, Kurdistan Region of Iraq

2020 ◽  
Vol 7 (3) ◽  
Author(s):  
Ibrahim A Naqid ◽  
Amer A Balatay ◽  
Nawfal Rasheed Hussein ◽  
Kurdistan Abdullah Saeed ◽  
Hiba Abdulaziz Ahmed ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
High Resistance ◽  
Antibiotic Susceptibility ◽  
Bacterial Infections ◽  
Antibiotic Sensitivity ◽  
Multidrug Resistant ◽  
Clinical Isolates ◽  
Clinical Samples ◽  
Sensitivity Testing ◽  
E Coli

Background: Escherichia coli (E. coli) is one of the most common causative agents of bacterial infections. The emergence of multidrug-resistant E. coli is a major public health threat worldwide. Objectives: This study aimed to determine the antibiotic susceptibility profile of clinical isolates of E. coli from different samples. Methods: A total number of 454 clinical samples, including urine, wound, cervical swab, blood, semen, ascetic, and cerebral spinal fluid samples were collected from patients between January 2017 and February 2020. Then, E. coli was confirmed and susceptibility to different antibiotics was determined using the Vitek-2 compact system. Results: Escherichia coli isolates were more frequent in females (70.7%) than in males (29.3%). In the case of urine samples, E. coli was found to be highly susceptible to ertapenem (97.6%) and imipenem (96.4%) but resistant to ampicillin (87.8%). For wound and cervical swabs, E. coli was 100% resistant to ampicillin and cefepime but 100% sensitive to ertapenem and imipenem. It was found that E. coli isolates from blood samples were 100% resistant to ampicillin, ceftriaxone, and cefoxitin, and around 75% of them were sensitive to ertapenem, ciprofloxacin, and levofloxacin. Finally, E. coli isolated from other clinical samples were highly sensitive to ertapenem, imipenem, levofloxacin, nitrofurantoin, and cefazolin. Conclusions: Escherichia coli isolated from various clinical specimens showed differences in antibiotic sensitivity patterns, with high resistance to commonly used antibiotics. The most effective antibiotics against E. coli isolates were ertapenem, imipenem, and nitrofurantoin. However, the clinical isolates of E. coli displayed high resistance rates to ampicillin, ceftriaxone, and cefepime. Therefore, it is proposed to perform antibiotic sensitivity testing by physicians to select the most effective antibiotics.

Study of Multidrug Resistance Pattern among Escherichia coli isolated from patients with Urinary tract infection

2016 ◽  
Vol 9 (6) ◽  
pp. 157
Author(s):  
Soniya Goyal ◽  
Vikas Beniwal
Keyword(s):  
Escherichia Coli ◽  
Multidrug Resistance ◽  
Urinary Tract ◽  
Bacterial Infections ◽  
Multidrug Resistant ◽  
Resistance Pattern ◽  
Male Population ◽  
Antimicrobial Drugs ◽  
E Coli ◽  
Tract Infections

Objective: Urinary tract infections (UTIs) are some of the most common bacterial infections encountered in community and cause of significant morbidity and high medical cost. Escherichia coli is the most common pathogen belongs to Enterobacteriaceae family responsible for majority of UTI infections. Antimicrobial drugs have been routinely prescribed for empirical treatment of UTIs which has led to a dramatic increase in antibiotic resistance pattern of E. coli. The aim of present study was to analyse the multidrug resistance patterns (MDR) of E. coli isolated from UTI patients.Methods: A total of 80 urine samples collected from the patients suspected of having UTI attending Maharishi Markandeshwar Institute of Medical Sciences and Research (MMIMSR), Mullana, Ambala were cultured using standard microbiological techniques. Antibiotic susceptibility testing of E.coli was done by using minimum inhibitory concentration (MIC). MIC of tetracycline, doxycycline, azithromycin, erythromycin, ciprofloxacin, levofloxacin, ampicillin, amoxicillin and amikacin was done by agar dilution method.Results: Of the total 46 isolates contributing 33 females and 13 males were confirmed as E. coli. About 51.34% of the female patients belonged to the age group 21-40 yr and 53.84% of the male population belonged to 41-80 yr were found to be more susceptible to UTI infection. All isolates confirmed as E.coli were found to be multidrug resistant. 80% of the isolates exhibited MICs higher than 1000mg/L against β-lactams. 20% of the E. coli isolates exhibited MICs higher than 1000mg/L against ciprofloxacin, amikacin and erythromycin. 23% and 95% of E. coli isolates exhibited MICs less than 128 mg/L against doxycycline and levofloxacin respectively.Conclusion: The present study revealed the decreased susceptibility of the E.coli to all drugs. E. coli resistance profile to beta lactams, quinolones, macrolides, tetracyclines and aminoglycosides were also found to be quite high in this study emphasizing the need to educate public about appropriate use of antibiotics.NA

scholarly journals Impact of Phage Therapy on Multidrug-Resistant Escherichia coli Intestinal Carriage in a Murine Model

2021 ◽  
Vol 9 (12) ◽  
pp. 2580
Author(s):  
François Javaudin ◽  
Pascale Bémer ◽  
Eric Batard ◽  
Emmanuel Montassier
Keyword(s):  
Escherichia Coli ◽  
Drinking Water ◽  
Phage Therapy ◽  
Oral Treatment ◽  
Multidrug Resistant ◽  
Health Concern ◽  
Water Model ◽  
Resistant Bacteria ◽  
P Value ◽  
E Coli

Introduction: The growing resistance of bacteria to antibiotics is a major global public health concern. An important reservoir of this resistance is the gut microbiota. However, limited data are available on the ability of phage therapy to reduce the digestive carriage of multidrug-resistant bacteria. Materials and methods: Four novel lytic phages were isolated in vitro for efficacy against an extended-spectrum beta-lactamase-producing (ESBL) Escherichia coli strain also resistant to carbapenems through a carbapenemase OXA-48. The first step was to develop models of ESBL E. coli digestive carriage in mice. The second step was to test the efficacy of an oral and rectal phage therapy (a cocktail of four phages or microencapsulated phage) to reduce this carriage. Results: The two most intense models of digestive carriage were obtained by administering amoxicillin (0.5 g·L−1) continuously in the drinking water (Model 1) or pantoprazole (0.1 g·L−1) continuously in the drinking water, combined with amoxicillin (0.5 g·L−1), for the first 8 days (Model 2). Oral administration of the phage cocktail to Model 1 resulted in a transient reduction in the concentration of ESBL E. coli in the faeces 9 days after the bacterial challenge (median = 5.33 × 108 versus 2.76 × 109 CFU·g−1, p = 0.02). In contrast, in Model 2, oral or oral + rectal administration of this cocktail did not alter the bacterial titre compared to the control (area under the curve, AUC, 3.49 × 109; 3.41 × 109 and 3.82 × 109 for the control, oral and oral + rectal groups, respectively; p-value > 0.8 for each two-by-two group comparison), as well as the administration of an oral microencapsulated phage in Model 1 (AUC = 8.93 × 109 versus 9.04 × 109, p = 0.81). Conclusions: Oral treatment with amoxicillin promoted digestive carriage in mice, which was also the case for the addition of pantoprazole. However, our study confirms the difficulty of achieving efficacy with phage therapy to reduce multidrug-resistant bacterial digestive carriage in vivo.

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