Antibiotic resistance in clinical isolates of Escherichia coli non-producer of Extended Spectrum Betalactamases (ESBL), obtained from urine cultures in patients with urinary tract infection
Abstract
Abstract Objective: To identify strains of Escherichia coli that do not produce Extended Spectrum Betalactamases (ESBL) in urine cultures and to evaluate the patterns of resistance to certain antibiotics used in clinical practice as treatments of choice in the Toluca Valley of Mexico. Method: 155 urine samples were obtained from people in the Toluca Valley, Mexico under necessary hygiene conditions. 100ml used to identify the pathogen and its resistance patterns were collected from each sample, using an automated Walkaway method. Result: 19 strains of non-ESBL-producing Escherichia coli were obtained, of which 68.42% showed resistance to ampicillin and tetracycline, 47.36% resistance to trimethoprim with sulfamethoxazole, 26.31% for levofloxacin, ciprofloxacin, ceftriaxone, and resistance of 21 % with ampicillin and sulbactam. 100% sensitivity for amikacin, tigecycline and carbapenems. Conclusion: Antibiotic resistance represents a major health problem, as the present study shows, ampicillin is a drug of choice for urinary tract infection produced by Eschericha coli, but in the Toluca Valley the resistance to this antibiotic is 68.42% In non-ESBL producing strains, high resistance patterns are also shown for quinolones, tetracycline and trimethoprim with sulfamethoxazole.
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