DETECTION OF EXTENDED-SPECTRUM β-LACTAMASE GENES IN PSEUDOMONAS AERUGINOSA ISOLATES WITH PHENOTYPIC NON-RESISTANT PROFILE

Thị Nga Lưu, Văn An Nguyễn, Nguyễn Minh Hoa Lê, Dũng Sĩ Chu, Thị Trang Nhung Lê, Hạ Long Hải Lê

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Abstract

Objectives: Pseudomonas aeruginosa is a leading cause of infections in most parts of the world. The production of extended-spectrum β-lactamase (ESBL) is an essential mechanism of β-lactam resistance in the bacterium. Methods: In this cross-sectional study, 24 P. aeruginosa strains displaying non-resistance to the tested antibiotics were examined. Multiplex Real-time PCR was employed to identify ESBL genes within these strains. Results: Of the 24 Pseudomonas aeruginosa isolates with a phenotypic non-resistant profile, 17 (70.8%) isolates were found to contain ESBL genes. Among these ESBL-positive isolates, the blaCTX-M (82.4%) was the most common gene, followed by blaTEM (35.3%), and blaSHV (23.5%), either alone or in combination. Conclusion: The results of this study showed the notable prevalence of ESBL genes among the clinical isolates of P. aeruginosa, indicating the urgency for the implementation of appropriate follow-up measures for infection control and proper administration of antimicrobial agents in medical settings

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