• Gac Med Mex · Jan 2020

    Ceftolozane/tazobactam and ceftazidime/avibactam antimicrobial activity against clinically relevant gram-negative bacilli isolated in Mexico.

    • Rafael Martínez-Miranda, Mariana Gastélum-Acosta, Paloma Guerrero-Estrada, Rafael I Ayala-Figueroa, and Luis E Osuna-Álvarez.
    • Department of Clinical Microbiology, Faculty of Medicine, Universidad Autónoma de Baja California.
    • Gac Med Mex. 2020 Jan 1; 156 (6): 592-597.

    IntroductionThere is limited information on the effectiveness of ceftolozane/tazobactam and ceftazidime/avibactam combinations on clinically relevant strains isolated in Mexico.ObjectiveTo determine the antimicrobial profile of both antibiotic combinations in our community.MethodThe present research study was prospective, descriptive and cross-sectional. Clinically relevant strains isolated from pure-strain cultures were included during the period from August 2018 to January 2019 in Mexicali, Baja California, Mexico.Results74 enterobacteriaceae and 19 Pseudomonas aeruginosa strains were analyzed; the percentage of sensitivity of ceftazidime/avibactam was 100 % for enterobacteriaceae and 72.7 % for Pseudomonas aeruginosa; the percentage of sensitivity of ceftolozane/tazobactam for enterobacteriaceae was 90.5 % and 72.7 % for Pseudomonas aeruginosa.ConclusionsThe ceftolozane/tazobactam and ceftazidime/avibactam combinations offer good antimicrobial sensitivity in vitro, both for ESBL-producing enterobacteriaceae and Pseudomonas aeruginosa. More data are required to assess clinical response in patients receiving these antibiotic combinations.IntroducciónExiste poca información acerca de la efectividad de las combinaciones ceftolozano/tazobactam y ceftazidima/avibactam en cepas clínicamente relevantes aisladas en México.ObjetivoDeterminar el perfil antimicrobiano de ambos antibióticos en nuestra comunidad.MétodoEl presente estudio de investigación fue prospectivo, descriptivo y transversal. Se incluyeron cepas clínicamente relevantes aisladas a partir de cultivos de cepa pura durante el periodo de agosto de 2018 a enero de 2019 en Mexicali, Baja California, México.ResultadosSe analizaron 74 cepas de enterobacterias y 19 cepas de Pseudomonas aeruginosa; el porcentaje de sensibilidad de ceftazidima/avibactam fue de 100 % contra enterobacterias y de 72.7 % contra Pseudomonas aeruginosa; el porcentaje de sensibilidad de ceftolozano/tazobactam fue de 90.5 % para enterobacterias y de 72.7 % para Pseudomonas aeruginosa.ConclusionesLas combinaciones ceftolozano/tazobactam y ceftazidima/avibactam ofrecen buena sensibilidad antimicrobiana in vitro, tanto contra enterobacterias productoras de betalactamasas de espectro extendido como contra Pseudomonas aeruginosa. Se requieren más datos para valorar la respuesta clínica en pacientes que reciben esas combinaciones de antibióticos.Copyright: © 2020 Permanyer.

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