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Uropathogenic Escherichia coli Biofilm-Forming Capabilities are not Predictable from Clinical Details or from Colonial Morphology
Communication

Association between Biofilm-Production and Antibiotic Resistance in Uropathogenic Escherichia coli (UPEC): An In Vitro Study

1
Department of Microbiology, College of Basic Sciences, Shahr-e-Qods Branch, Islamic Azad University, Tehran 37541-374, Iran
2
Department of Public Health, Faculty of Medicine, University of Szeged, 6720 Szeged, Dóm tér 10, Hungary
3
Institute of Translational Medicine, University of Pécs Medical School, 7624 Pécs, Szigeti utca 12, Hungary
4
Department of Pharmacodynamics and Biopharmacy, Faculty of Pharmacy, University of Szeged, 6720 Szeged, Eötvös utca 6, Hungary
5
Institute of Medical Microbiology, Faculty of Medicine, Semmelweis University, 1089 Budapest, Nagyvárad tér 4, Hungary
*
Author to whom correspondence should be addressed.
Received: 11 May 2020 / Revised: 3 June 2020 / Accepted: 4 June 2020 / Published: 7 June 2020
(This article belongs to the Special Issue Chronic and Infectious Diseases)
Urinary tract infections (UTIs) are among the most common infections requiring medical attention worldwide. The production of biofilms is an important step in UTIs, not only from a mechanistic point of view, but this may also confer additional resistance, distinct from other aspects of multidrug resistance (MDR). A total of two hundred and fifty (n = 250) Escherichia coli isolates, originating from clean-catch urine samples, were included in this study. The isolates were classified into five groups: wild-type, ciprofloxacin-resistant, fosfomycin-resistant, trimethoprim-sulfamethoxazole-resistant and extended spectrum β-lactamase (ESBL)-producing strains. The bacterial specimens were cultured using eosine methylene blue agar and the colony morphology of isolates were recorded. Antimicrobial susceptibility testing was performed using the Kirby–Bauer disk diffusion method and E-tests. Biofilm-formation of the isolates was carried out with the crystal violet tube-adherence method. n = 76 isolates (30.4%) produced large colonies (>3 mm), mucoid variant colonies were produced in n = 135 cases (54.0%), and n = 119 (47.6%) were positive for biofilm formation. The agreement (i.e., predictive value) of mucoid variant colonies in regard to biofilm production in the tube-adherence assay was 0.881 overall. Significant variation was seen in the case of the group of ESBL-producers in the ratio of biofilm-producing isolates. The relationship between biofilm-production and other resistance determinants has been extensively studied. However, no definite conclusion can be reached from the currently available data. View Full-Text
Keywords: urinary tract infections; uropathogen; Escherichia coli; biofilm; colony morphology; antibiotic; resistance; crystal violet urinary tract infections; uropathogen; Escherichia coli; biofilm; colony morphology; antibiotic; resistance; crystal violet
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MDPI and ACS Style

Behzadi, P.; Urbán, E.; Gajdács, M. Association between Biofilm-Production and Antibiotic Resistance in Uropathogenic Escherichia coli (UPEC): An In Vitro Study. Diseases 2020, 8, 17. https://0-doi-org.brum.beds.ac.uk/10.3390/diseases8020017

AMA Style

Behzadi P, Urbán E, Gajdács M. Association between Biofilm-Production and Antibiotic Resistance in Uropathogenic Escherichia coli (UPEC): An In Vitro Study. Diseases. 2020; 8(2):17. https://0-doi-org.brum.beds.ac.uk/10.3390/diseases8020017

Chicago/Turabian Style

Behzadi, Payam, Edit Urbán, and Márió Gajdács. 2020. "Association between Biofilm-Production and Antibiotic Resistance in Uropathogenic Escherichia coli (UPEC): An In Vitro Study" Diseases 8, no. 2: 17. https://0-doi-org.brum.beds.ac.uk/10.3390/diseases8020017

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