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As a Potential Reservoir of Antimicrobial Resistance Genes on the Island of O'ahu

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Date 2021 Jan 25
PMID 33490961
Citations 3
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Abstract

The problem of antimicrobial-resistant bacteria has not been adequately explored in the tropical island environment. To date, there has not been a systematic investigation into the prevalence and distribution of antimicrobial resistance determinants in the Hawaiian Islands. Urinary isolates are the most common bacterial pathogens encountered in the clinical laboratory. Therefore, the antimicrobial resistance determinant profiles of these organisms can serve as a sentinel of the overall antimicrobial resistance situation in a localized patient population. In this study, 82 clinical isolates of derived from 82 distinct patients were collected at a large medical center on the island of O'ahu. Each isolate was evaluated for the presence of antimicrobial resistance genes using a microarray-based approach. A total of 36 antimicrobial resistance genes covering 10 classes of antimicrobial compounds were identified. Most isolates were found to harbor between 3 and 5 antimicrobial resistance genes. Only a few isolates were found to harbor more than 12 genes. Significantly, a high rate of phenotypic resistance to one of the first-line treatments for uncomplicated urinary tract infection (sulfamethoxazole) was identified. This phenotype was correlated to the presence of sulfonamides and trimethoprim resistance determinants. Since is one of the most encountered pathogens in the hospital environment, the presence of clinically relevant resistance determinants in isolates of this organism from a clinical setting on O'ahu is a significant finding that warrants further investigation.

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