Virulence Factors Associated with Quinolone Resistance in Proteus Species Isolated from Patients with Urinary Tract Infection

2021 ◽  
Vol 30 (1) ◽  
pp. 115-123
Author(s):  
Samah S. El-Kazzaz ◽  
Noha M. Mahmoud
Keyword(s):  
Urinary Tract ◽  
Virulence Factors ◽  
Resistance Genes ◽  
Biofilm Formation ◽  
Quinolone Resistance ◽  
Protease Production ◽  
Causative Organism ◽  
Haemolytic Activity ◽  
Antibiotic Resistant ◽  
Tract Infections

Background: Proteus is an important causative organism of urinary system infections. The invasive nature of Proteus is supported by expression of multiple virulence factors; the infection outcome gets worse when those virulent isolates acquire antibiotic resistant determinants. Objectives: The present study was aiming at isolation of Proteus from urine of patients with urinary tract infections (UTIs) and to assess the relation between virulence factors expression and presence of quinolones resistance genes in those isolates. Methodology: Quinolone resistant Proteus isolates were chosen for detection of quinolone resistance genes, also they were tested for presence of different virulence factors. Results: Sixty eight quinolone resistant Proteus isolates were determined. aac(6′)- Ib-cr was the most frequently detected quinolone resistance gene. Haemagglutination, haemolytic activity, protease production and biofilm formation were documented in 79.4%, 76.5%, 70.6% and 83.8% of the isolates respectively. Conclusion: Proteus isolated from urine displayed many virulence factors and harbored a variety of quinolone resistance genes.

scholarly journals Characteristics ofEscherichia colicausing persistence or relapse of urinary tract infections: Phylogenetic groups, virulence factors and biofilm formation

Virulence ◽  
2011 ◽  
Vol 2 (6) ◽  
pp. 528-537 ◽  
Author(s):  
Karen Ejrnæs ◽  
Marc Stegger ◽  
Andreas Reisner ◽  
Sven Ferry ◽  
Tor Monsen ◽  
...  
Keyword(s):  
Urinary Tract ◽  
Virulence Factors ◽  
Urinary Tract Infections ◽  
Biofilm Formation ◽  
Phylogenetic Groups ◽  
Tract Infections

scholarly journals Synergy of the Bacteriocin AS-48 and Antibiotics against Uropathogenic Enterococci

Antibiotics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 567
Author(s):  
Manuel Montalbán-López ◽  
Rubén Cebrián ◽  
Rosa Galera ◽  
Lidia Mingorance ◽  
Antonio M. Martín-Platero ◽  
...  
Keyword(s):  
Urinary Tract ◽  
Virulence Factors ◽  
Antibiotic Resistant ◽  
Gram Positive Bacteria ◽  
Circular Bacteriocin ◽  
Health Care Associated Infections ◽  
Low Toxicity ◽  
Resistant Strains ◽  
Tract Infections ◽  
Novel Drug

The genus Enterococcus comprises a ubiquitous group of Gram-positive bacteria that can cause diverse health care-associated infections. Their genome plasticity enables easy acquisition of virulence factors as well as antibiotic resistances. Urinary tract infections (UTIs) and catheter-associated UTIs are common diseases caused by enterococci. In this study, Enterococcus strains isolated from UTIs were characterized, showing that the majority were E. faecalis and contained several virulence factors associated to a better colonization of the urinary tract. Their susceptibility against the bacteriocin AS-48 and several antibiotics was tested. AS-48 is a potent circular bacteriocin that causes bacterial death by pore formation in the cell membrane. The interest of this bacteriocin is based on the potent inhibitory activity, the high stability against environmental conditions, and the low toxicity. AS-48 was active at concentrations below 10 mg/L even against antibiotic-resistant strains, whereas these strains showed resistance to, at least, seven of the 20 antibiotics tested. Moreover, the effect of AS-48 combined with antibiotics commonly used to treat UTIs was largely synergistic (with up to 100-fold MIC reduction) and only occasionally additive. These data suggest AS-48 as a potential novel drug to deal with or prevent enterococcal infections.

scholarly journals Spread of Enterococcal Surface Protein in Antibiotic Resistant Entero-coccus faecium and Enterococcus faecalis isolates from Urinary Tract Infections

2015 ◽  
Vol 9 (1) ◽  
pp. 14-17 ◽  
Author(s):  
Hossein Samadi Kafil ◽  
Ashraf Mohabati Mobarez
Keyword(s):  
Urinary Tract Infection ◽  
Urinary Tract ◽  
Tract Infection ◽  
Urinary Tract Infections ◽  
Biofilm Formation ◽  
Urinary Infection ◽  
Surface Protein ◽  
Antibiotic Resistant ◽  
Specific Pcr ◽  
Tract Infections

Enterococci rank among leading cause of nosocomial bacteremia and urinary tract infection in hospital and community acquired infections. Several traits that may contribute to enhanced virulence have been identified in Enterococci. Extracellular surface protein (Esp) is a virulence factor that contributes in biofilm formation and resistance to environmental stresses. In this study we aimed to determine occurrence ofespinE. faeciumandE. faecalisisolates isolated from urinary tract infections and to investigate whether there is any correlation between presence ofespand antibiotic resistance. One hundred and sixty six isolates were collected from patients with UTI and after identification by biochemical and PCR, antibiotic resistances were examined. The presence ofespwas investigated by primer-specific PCR. 43.3% of isolates identified asE. faeciumand 56.7% asE. faecalis. Theespgene was found in 76.1% ofE. faeciumisolates and 77.9% ofE. faecalisisolate. There were significant correlation betweenesppositiveE. faeciumand resistance to Vancomycin (p<0.01), also inE.faecaliswe found correlation betweenesppositive and resistance to Ampicillin, Chloramphenicol and Tetracycline (p<0.01, p<0.01, p<0.01 respectively). Occurrence ofespin our isolates from urinary tract infection was high that indicates importance of this gene in urinary tract infections and shows importance of ability to forming biofilm and hydrophobicity of surface of Enterococci for causing urinary infection by Enterococci. Also, our finding showed significant correlation between resistance to antibiotics and presence ofespin Enterococci.

scholarly journals Urinary Tract Infections in Benin: Exploring the Virulence Factors and Antibiotic Resistance and Virulence Genes among Bacterial Isolates

2021 ◽  
pp. 28-36
Author(s):  
Victorien Dougnon ◽  
Phénix Assogba ◽  
Jibril Mohammed ◽  
Jerrold Agbankpe ◽  
Esther Deguenon ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Urinary Tract ◽  
Virulence Factors ◽  
Urinary Tract Infections ◽  
Resistance Genes ◽  
Antibiotic Resistance Genes ◽  
Public Health Problem ◽  
Virulence Gene ◽  
Scientific Data ◽  
Tract Infections

Objective: The emergence and increasing spread of resistance to antibiotics in uropathogenic Enterobacteriaceae is a huge public health problem and increase the morbidity and mortality. The objective of this study was to produce scientific data on the virulence and level of resistance of these bacteria in Benin. Results: This study was conducted on 230 strains of enterobacteria isolated from patients with urinary tract infections. These virulence factors sought were hemolysis, hemagglutination, serum resistance, biofilm formation, and the production of lipase, protease and lecithinase. The molecular characterization of the virulence and antibiotic resistance genes was accomplished by PCR according to the different conditions for each gene. The bacteria possessed several types of virulence factors such as hemagglutinin (28.26%), lipase production (23.92%) and hemolysin production (17.83%). The virulence gene identified were FimH (74.79%), PapC (30.44%), Iss (11.34%) and Biofilm (3.92%). The antibiotic resistance genes such as Bla-SHV (49.56%), Bla-CTX-M15, Bla-CTX-M2 (33.92%), Bla-CTX-M9 (19.13%) and bla-CTX-M1 (11.74%) were also detected. Conclusion: These results filled the national gap about virulence and antimicrobial resistance of enterobacteria responsible of urinary tract infection and may be used to improve the management of patients in Benin.

The effect of some chemical materials against virulence factors of Candida ssp isolated from UTI patients

2018 ◽  
Vol 9 (SPL1) ◽  
Author(s):  
Fatima Abdul Hussein Mejbel
Keyword(s):  
Urinary Tract Infection ◽  
Urinary Tract ◽  
Tract Infection ◽  
Virulence Factors ◽  
Biofilm Formation ◽  
Germ Tube ◽  
Laboratory Culture ◽  
Candida Spp ◽  
Other Substances ◽  
Chemical Materials

 During the period from September 2016 to December 2017,135 urine samples were collected from urinary tract infection patients attending to AL-Zahraa Hospital in AL-Najaf Governorate. The present study was conducted to isolate and identify Candida spp. isolated from urinary tract infection patients by different methods including direct examination, laboratory culture, biochemical test and by modern techniques (Api Candida kit) and determine the virulence factors phenotypic to Candida spp which involved (biofilm formation,phospholipase and germ tube). The percentage of females to males was as following, female (84) 62.2 % (21) infected and male (51) 37.8% (1) infected with all age categories. The results in this study are explain that is some Candida spp. such as C. albicans, have high susceptible to eugenole follow by phenol and umbellulone. The efficiency of some chemical substances such as (eugenole,umbellulone, and phenol) was evaluated to inhibit the growth of Candida ssp as well as some virulence factors such as biofilm formation,germ tube and phospholipase,which were studied in this research. Statistically analysis results have been significance difference between the results of the substance concentrations and the concentrations of the different other substances.

Urinary Tract Infections in Patients with Type 1 and Type 2 Diabetes: Etiology, Resistance to Antibacterial Chemicals and Virulence Features

2017 ◽  
Vol 68 (3) ◽  
pp. 566-569 ◽  
Author(s):  
Mihaela Magdalena Mitache ◽  
Carmen Curutiu ◽  
Elena Rusu ◽  
Ramona Bahna ◽  
Mara Ditu ◽  
...  
Keyword(s):  
Urinary Tract ◽  
Virulence Factors ◽  
Urinary Tract Infections ◽  
Disk Diffusion ◽  
Diffusion Method ◽  
Diabetic Patients ◽  
Disk Diffusion Test ◽  
Tract Infections ◽  
Susceptibility Profiles ◽  
Diabetes Patients

One of the most frequent chronic complications occurred in diabetes patients are the urinary tract infections (UTIs). This study aimed to investigate the incidence of UTIs in a cohort of 93 (47 males: 46 females) diabetic patients, the prevalence of different microbial species involved and their virulence and antibiotic resistance profiles. The identification of the uropathogenic strains in the positive urine samples was performed using conventional methods and API tests. After identification, the antibiotic susceptibility profiles were established by the standardized disk diffusion method and double disk diffusion test was performed for the confirmation of ESBL and inducible AmpC b �lactamase phenotypes. The isolated strains were tested for the production of different cell associated and soluble virulence factors, i.e.: bacterial adherence to cellular substrata (HeLa cells), hemolysins (hemolysis spot, CAMP-like), amylase, caseinase, aesculin hydrolysis, DNA-ase, lipase and lecithinase. In the analyzed group, the total prevalence of UTIs was of 46%, a higher incidence being observed in the female patients (64%). Similar to other studies, the etiology of UTI in the investigated diabetes patients was dominated by E. coli, followed by Klebsiella sp. strains. The isolated strains preserved good susceptibility rates to quinolones and aminoglycosides and revealed important virulence features, related to their capacity to colonize the cellular substratum and to produce soluble virulence factors involved in persistence, colonization and progression of the infectious process. The high percentage of beta-lactam resistant strains (including carbapenem-resistant ones) requires careful surveillance of the dynamics of susceptibility profiles for limiting the emergence of these strains in community.

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