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Development Of A Novel Loop-Mediated Isothermal Amplification Method To Detect Guiana Extended-Spectrum (Ges) Β-Lactamase Genes In Pseudomonas Aeruginosa, Chika Takano, Mitsuko Seki, Dong Wook Kim, Humphrey Gardner, Robert E. Mclaughlin, Paul E. Kilgore, Kazunari Kumasaka, Satoshi Hayakawa

Department of Pharmacy Practice

Infections caused by multidrug-resistant Pseudomonas aeruginosa in hospitalized patients are often fatal, and nosocomial infections caused by Guiana extended-spectrum (GES) β-lactamase-producing strains are of growing concern. Several genotypes of the GES β-lactamase gene (bla_GES) include a single missense mutation, a change from G to A at nucleotide position 493 (G_493A) that changes glycine to serine; the mutant enzyme exhibits carbapenemase activity. Rapid and reliable identification of drug-resistance is important in clinical settings; however, culture methods remain the gold standard. Conventional and real-time PCR cannot identify carbapenemase-producing genotypes, and direct DNA sequencing is essential. We established …