Distribution of virulence genes and multiple drug‐resistant patterns amongst different phylogenetic groups of uropathogenic Escherichia coli isolated from patients with urinary tract infection

2014 ◽  
Vol 60 (2) ◽  
pp. 148-154 ◽  
Author(s):  
A. Derakhshandeh ◽  
R. Firouzi ◽  
M. Motamedifar ◽  
A. Motamedi Boroojeni ◽  
M. Bahadori ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Urinary Tract Infection ◽  
Urinary Tract ◽  
Tract Infection ◽  
Virulence Genes ◽  
Uropathogenic Escherichia Coli ◽  
Multiple Drug ◽  
Drug Resistant ◽  
Phylogenetic Groups ◽  
Multiple Drug Resistant

Risk factors for urinary tract infection with multiple drug-resistant Escherichia coli in cats

2013 ◽  
Vol 16 (2) ◽  
pp. 75-81 ◽  
Author(s):  
Juan Hernandez ◽  
Doroteia Bota ◽  
Marion Farbos ◽  
Fanny Bernardin ◽  
Guillaume Ragetly ◽  
...  
Keyword(s):  
Risk Factors ◽  
Escherichia Coli ◽  
Urinary Tract Infection ◽  
Urinary Tract ◽  
Tract Infection ◽  
Multiple Drug ◽  
Drug Resistant ◽  
Multiple Drug Resistant

scholarly journals Virulence genes and phylogenetic groups of uropathogenic Escherichia coli isolates from patients with urinary tract infection and uninfected control subjects: a case-control study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Seyedeh Elham Rezatofighi ◽  
Mahsa Mirzarazi ◽  
Mansour Salehi
Keyword(s):  
Escherichia Coli ◽  
Urinary Tract Infection ◽  
Urinary Tract ◽  
Tract Infection ◽  
Virulence Factors ◽  
Virulence Genes ◽  
Strong Association ◽  
Phylogenetic Groups ◽  
E Coli ◽  
Healthy Humans

Abstract Background Urinary Tract Infection (UTI) is one of the most common bacterial infectious diseases which causes considerable morbidity and costly health problems. Uropathogenic Escherichia coli (UPEC), the most common pathogen causing UTI, is a highly heterogeneous group of extraintestinal pathogenic E. coli (ExPEC) which may carry a variety of virulence factors and belonging to different phylogenetic backgrounds. The current study aimed to investigate the frequency and association between various virulence factors (VFs) and phylogenetic groups of UPEC and commensal isolates. Methods UPEC and commensal E. coli strains isolated from UTI and feces of healthy humans were compared for the presence of VFs and phylogenetic groups. Association between virulence genes was investigated and cluster analysis was employed. Results According to the results, among a 30 virulence markers tested, the pathogenicity-associated island (PAI), papAH, papEF, fimH, fyuA, and traT genes prevalence were statistically significant in UPEC isolates. A strong association was found between the B2 and D phylogenetic groups and clinical isolates of UPEC; while, commensal isolates were mostly associated with phylogenetic group A. The aggregated VFs scores were more than twice higher in the UPEC isolates in comparison with the commensal isolates. Interestingly, the B2 group in both UPEC and commensal isolates had the highest VF scores. A strong positive association was found between several virulence genes. The clustering results demonstrated that UPEC or commensal E. coli isolates were highly heterogeneous due to different composition of their virulence gene pool and pathogenicity islands. Conclusion Genetic structure and VFs of UPEC strains vary from region to region; therefore, to control the UTI, the epidemiological aspects and characterization of the UPEC isolates need to be investigated in different regions. Since UPEC isolates are generally originate from the commensal strains, it may be feasible to reduce the UTI burden by interfering the intestinal colonization, particularly in the highly pathogenic clonal lineages such as B2.

scholarly journals A Study on Prevalence of Serum Resistant & Sensitive Escherichia Coli in Urinary Tract Infection

2020 ◽  
Vol 9 (4) ◽  
pp. 1-6
Author(s):  
K. Prakash ◽  
J. Shravan Kumar ◽  
J. Rajamouli ◽  
Sachin Gurnule
Keyword(s):  
Escherichia Coli ◽  
Urinary Tract Infection ◽  
Urinary Tract ◽  
Tract Infection ◽  
Uropathogenic Escherichia Coli ◽  
Urine Samples ◽  
Multiple Drug ◽  
Serum Resistance ◽  
Symptomatic Disease ◽  
Multiple Drugs

Background: Escherichia coli is the commonest organism causing urinary tract infection in women and children especially in those with uncom- plicated infections. It has been traditionally described Serotypes of Escherichia coli were consistently associated with Uropathogenicity and designated as Uropathogenic Escherichia coli.It is now recognized that a subset of fecal Escherichia coli can be colonized in the peri-urethral area, enter the urinary tract and cause symptomatic disease. These are currently defined as Uropathogenic Escherichia coli. The aims & objectives are to the isolation of Escherichia coli in Urinary tract infection. 2. To determine the prevalence of Serum resistant Uropathogenic Escherichia coli. 3. To compare antimicrobial efficacy in Serum resistant and Serum sensitive Uropathogenic Escherichia coli. Subjects & Methods: An observational study was conducted on 100 patients and urine samples collected from suspected and suffering from urinary tract infection. Study period from August 2018 to July 20019 attending General medicine OP in Hospital. Escherichia coli were isolated and identified by conventional techniques Mackie & Mc Cartney. The strains were subjected to multiple drugs to study serum resistance and sensitivity. Results: From 100 urine samples 71 Uropathogenic, 18 males & 53 females. 40% Sero-resistant and 60% Sero-sensitive among them 2 to 18 years males and > 40 years females resistant, above 40 years males and 19 to 40 years females are sensitive to multiple antibiotics. Conclusion: it emphasizes Serum resistance is an important virulence factor, It may lead to pyelonephritis and septicemia. Serum resistant E. coli are multiple drug-resistant, so the present study formulating guidelines for planning effective treatment and Periodic surveillance to monitor resistance.

scholarly journals Comparison of virulence factors and expression of specific genes between uropathogenic Escherichia coli and avian pathogenic E. coli in a murine urinary tract infection model and a chicken challenge model

Microbiology ◽  
2009 ◽  
Vol 155 (5) ◽  
pp. 1634-1644 ◽  
Author(s):  
Lixiang Zhao ◽  
Song Gao ◽  
Haixia Huan ◽  
Xiaojing Xu ◽  
Xiaoping Zhu ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Urinary Tract Infection ◽  
Urinary Tract ◽  
Tract Infection ◽  
Virulence Genes ◽  
Iron Acquisition ◽  
Infection Model ◽  
Phylogenetic Groups ◽  
E Coli

Avian pathogenic Escherichia coli (APEC) and uropathogenic E. coli (UPEC) establish infections in extraintestinal habitats of different hosts. As the diversity, epidemiological sources and evolutionary origins of extraintestinal pathogenic E. coli (ExPEC) are so far only partially defined, in the present study,100 APEC isolates and 202 UPEC isolates were compared by their content of virulence genes and phylogenetic groups. The two groups showed substantial overlap in terms of their serogroups, phylogenetic groups and virulence genotypes, including their possession of certain genes associated with large transmissible plasmids of APEC. In a chicken challenge model, both UPEC U17 and APEC E058 had similar LD50, demonstrating that UPEC U17 had the potential to cause significant disease in poultry. To gain further information about the similarities between UPEC and APEC, the in vivo expression of 152 specific genes of UPEC U17 and APEC E058 in both a murine urinary tract infection (UTI) model and a chicken challenge model was compared with that of these strains grown statically to exponential phase in rich medium. It was found that in the same model (murine UTI or chicken challenge), various genes of UPEC U17 and APEC E058 showed a similar tendency of expression. Several iron-related genes were upregulated in the UTI model and/or chicken challenge model, indicating that iron acquisition is important for E. coli to survive in blood or the urinary tract. Based on these results, the potential for APEC to act as human UPEC or as a reservoir of virulence genes for UPEC should be considered. Further, this study compared the transcriptional profile of virulence genes among APEC and UPEC in vivo.

scholarly journals Molecular Epidemiology of Multidrug-Resistant Uropathogenic Escherichia coli O25b Strains Associated with Complicated Urinary Tract Infection in Children

2021 ◽  
Vol 9 (11) ◽  
pp. 2299
Author(s):  
Laura M. Contreras-Alvarado ◽  
Sergio Zavala-Vega ◽  
Ariadnna Cruz-Córdova ◽  
Juan Pablo Reyes-Grajeda ◽  
Gerardo Escalona-Venegas ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Genetic Diversity ◽  
Urinary Tract Infection ◽  
Urinary Tract ◽  
Tract Infection ◽  
Molecular Epidemiology ◽  
Virulence Genes ◽  
Multidrug Resistant ◽  
Uropathogenic Escherichia Coli ◽  
Phylogenetic Group

Background: Uropathogenic Escherichia coli (UPEC) has increased the incidence of urinary tract infection (UTI). It is the cause of more than 80% of community-acquired cystitis cases and more than 70% of uncomplicated acute pyelonephritis cases. Aim: The present study describes the molecular epidemiology of UPEC O25b clinical strains based on their resistance profiles, virulence genes, and genetic diversity. Methods: Resistance profiles were identified using the Kirby–Bauer method, including the phenotypic production of extended-spectrum β-lactamases (ESBLs) and metallo-β-lactamases (MBLs). The UPEC serogroups, phylogenetic groups, virulence genes, and integrons were determined via multiplex PCR. Genetic diversity was established using pulsed-field gel electrophoresis (PFGE), and sequence type (ST) was determined via multilocus sequence typing (MLST). Results: UPEC strains (n = 126) from hospitalized children with complicated UTIs (cUTIs) were identified as O25b, of which 41.27% were multidrug resistant (MDR) and 15.87% were extensively drug resistant (XDR). The O25b strains harbored the fimH (95.23%), csgA (91.26%), papGII (80.95%), chuA (95.23%), iutD (88.09%), satA (84.92%), and intl1 (47.61%) genes. Moreover, 64.28% were producers of ESBLs and had high genetic diversity. ST131 (63.63%) was associated primarily with phylogenetic group B2, and ST69 (100%) was associated primarily with phylogenetic group D. Conclusion: UPEC O25b/ST131 harbors a wide genetic diversity of virulence and resistance genes, which contribute to cUTIs in pediatrics.

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