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- W3148111309 abstract "Introduction Recently, increased frequencies of carbapenemase-producing Enterobacteriaceae have been reported worldwide. Among multiple genetic subtypes, oxacillinase (OXA)-48 β-lactamase-producing strains have been associated with inbound infection because they have been detected predominantly in patients who traveled outside of Japan. However, a recent case report of OXA-48 β-lactamase-producing Enterobacteriaceae suggested the latent spread of domestic infections. Due to a lack of specific inhibitors, culture-based detection of OXA-48 β-lactamase-producing bacteria is difficult. Thus, DNA-based detection methods, including PCR, direct sequencing and loop-mediated isothermal amplification (LAMP), have been employed. Among these methods, LAMP detection is more favorable than other methods because of its technical simplicity and low cost. Methods We designed novel LAMP primers to detect OXA-48 β-lactamase-producing bacteria and investigated their possible clinical applications with bacterial genome-spiked human materials (cerebrospinal fluid, blood, feces, urine, and sputum). We evaluated the specificity of the LAMP primers using 37 bacterial strains: 8 standard, 9 reference, and 20 clinical Gram-negative strains. Results Our LAMP primers detected 10 copies of the OXA-48 type β-lactamase gene and exhibited no cross reactivity with other β-lactamase genes. Sensitivity was not influenced in any clinical sample, in contrast to PCR detection, which was strongly inhibited by substances in fecal samples. Conclusions These results suggest the superior performance of LAMP compared with conventional PCR for detecting the OXA-48 type β-lactamase gene in various clinical samples." @default.
- W3148111309 created "2021-04-13" @default.
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- W3148111309 date "2021-07-01" @default.
- W3148111309 modified "2023-10-12" @default.
- W3148111309 title "An improved primer design for the loop-mediated isothermal amplification (LAMP) method to detect oxacillinase (OXA)-48 β-lactamase genes in Gram-negative bacteria for clinical applications" @default.
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- W3148111309 doi "https://doi.org/10.1016/j.jiac.2021.02.016" @default.
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