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Objectives To report antimicrobial resistance data for Gram-positive and Gram-negative pathogens isolated from paediatric patients in three hospitals in Kuwait during 2012–19. Methods In vitro activity of antimicrobials against isolates from documented infections was determined using CLSI broth microdilution method and breakpoints at a central laboratory. Enterobacterales and Pseudomonas aeruginosa isolates were screened for β-lactamases using multiplex PCR assays. Phenotypic determination of resistance in Haemophilus influenzae and Gram-positive isolates was performed using standard methodologies. Results Among 515 Enterobacterales isolates, 29.3% were ESBL-positive; susceptibility was highest to amikacin, ceftazidime/avibactam and meropenem (≥97.4%), regardless of ESBL status. CTX-M-15 was identified in 87.1% of ESBL-positive Escherichia coli and 84.2% of ESBL-positive Klebsiella pneumoniae isolates. Of 111 P. aeruginosa isolates, 9.9% were MDR and 12.6% meropenem-resistant (MEM-R). Amikacin and ceftazidime/avibactam had the highest susceptibility rates in the overall group (≥92.8%), with reduced rates among MDR and MEM-R isolates. All 269 MRSA and 180 MSSA isolates were susceptible to daptomycin, linezolid, teicoplanin, tigecycline and vancomycin. All MSSA and 99.3% of MRSA were ceftaroline susceptible. All 168 pneumococcal isolates were susceptible to ceftaroline, linezolid, tigecycline and vancomycin. H. influenzae and Streptococcus pyogenes ceftaroline susceptibility rates were ≥93.3% and ≥95.6%. Conclusions Most isolates of Enterobacterales (including resistant phenotypes) and P. aeruginosa from Kuwait during 2012–19 were susceptible to ceftazidime/avibactam. Ceftaroline was active against most Gram-positive isolates, including resistant phenotypes, and ESBL-negative Enterobacterales. These results indicate that novel antibiotics such as ceftazidime/avibactam and ceftaroline represent valuable treatment options for paediatric infections, including those caused by MDR organisms.

jac-antimicrobial resistance

Evaluation of the <i>in vitro</i> activity of ceftaroline, ceftazidime/avibactam and comparator antimicrobial agents against clinical isolates from paediatric patients in Kuwait: ATLAS data 2012–19

Evaluation of the in vitro activity of ceftaroline, ceftazidime/avibactam and comparator antimicrobial agents against clinical isolates from paediatric patients in Kuwait: ATLAS data 2012–19