Resumen

MIRANDA GARCIA, Mª C.. Extended spectrum beta-lactamase - positive Escherichia coli: resistance. Sanid. Mil. [online]. 2013, vol.69, n.4, pp.244-248. ISSN 1887-8571.  https://dx.doi.org/10.4321/S1887-85712013000400003.

Introduction: Escherichia coli is the microorganism most frequently found in nosocomial and community infections, responsible for upper airway infections, urinary tract infections, surgical wounds, blood infections or gastroenteritis. In the last years there have been important changes with a significant increase of infections caused by these extended spectrum beta-lactamase - positive germs. Objectives: It was decided to carry out this retrospective study of the samples processed in the microbiology laboratory of the Defense Basic Hospital «San Carlos» (San Fernando) in order to determine the frequency and sensitivity pattern of extended spectrum beta-lactamase - positive strains of E. coli, given the importance of the infections produced by this bacteria and the impact worldwide of the resistance mechanisms. Material and Method: The data obtained from the samples processed in the microbiology laboratory, and in which extended spectrum beta-lactamase - positive strains of E. coli were identified, were collected during 36 months (January 2009 to December 2011). Results: 34 extended spectrum beta-lactamase- positive strains of E. coli were isolated, that is a rate of 5.10%. A higher frequency was found in the year 2010 (6.9%) than in 2009 (2.61%) but similar to 2011 (5.98%). Conclusion: The frequency of extended spectrum beta-lactamase- positive strains of E. coli was similar to that found in other studies in Spain, but for some antimicrobials as amoxicillin/ clavulanic, cotrimoxazol, fluorquinolones, in our population the resistance rate is high.

Palabras clave : Escherichia coli; Extended spectrum beta-lactamase; Resistance.

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