alexa Abstract | PCR-based Method for Rapid and Minimized Electrochemical Detection of mecA Gene of Methicillin-resistant Staphylococcus aureus and Methicillinresistant Staphylococcus epidermidis
ISSN: 2327-5146

General Medicine: Open Access
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Research Article Open Access

Abstract

Methicillin-resistant Staphylococcus aureus (MRSA) is one of the most important pathogens that cause nosocomial infections. However, microbiological culture techniques take a few days to yield results; therefore, a simple, cost-effective, and rapid detection system is required for screening for MRSA and related bacteria: Methicillinresistant Staphylococcus epidermidis (MRSE) carriers during the hospital admissions process. In this study, we described the simplified method using by one-time use and screen-printed carbon electrodes, relied upon current quantification of Hoechst dyes which bound with DNA amplified via polymerase chain reaction (PCR) targeted for MRSA mecA gene. Amount of DNA-bound Hoechst molecules were measured by the hand-held potentiostat within two minutes. We found that the peak of a Hoechst-mediated current depended upon the number of MRSA cells, and successfully distinguished between carriers and a non-carrier based on nasal swabs from the patients. This method required only 10 μL for application, and the results could be obtained within total 60 min from sample collection when a minimum of 1 × 103 MRSA cells was present. These results suggested that this minimized technique has the potential to become a useful system of active surveillance for MRSA/MRSE carriers.

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Author(s): Tomohiko Ikeuchi , Masafumi Seki  Yukihiro Akeda, Norihisa Yamamoto, Shigeto Hamaguchi, Tomoya Hirose, Keiichiro Yamanaka, Masato Saito, Kazunori Tomono and Eiichi Tamiya

Keywords

Active surveillance, Electrode, Hoechst, Dyes,Potentiostat, General Medicine

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