Park, Jong-Min Kim, Jo-Il Noh, Joo-Yoon Kim, Mira Kang, Min-Jung Pyun, Jae-Chul 2024-01-20T02:04:43Z 2024-01-20T02:04:43Z 2021-09-01 2017-02 0141-0229 https://pubs.kist.re.kr/handle/201004/123124 Many kinds of susceptibility test for P-lactam antibiotics have been used to determine the antibiotic resistance of bacterial strains. Here, a sensitive antibiotic susceptibility test was presented by using a specialized reaction tool for laser desorption/ionization time-of-flight mass spectrometry (LDI-TOF MS) based on parylene-matrix chip. The p-lactamase assay was carried out in a specialized reaction tool by (1) concentrating the bacterial strain and (2) incubating the bacteria with penicillin-G. The parylene-matrix chip was produced by deposition of a partially porous parylene-N thin film on a dried organic matrix array, and the products of p-lactamase reaction in the low range of mass-to-charge ratio (m/z< 500) could be effectively analyzed by using a parylene-matrix chip. The sensing parameters were compared with conventional chromogenic antibiotic susceptibility test for beta-lactam antibiotics. Finally, LDI-TOF MS with a specialized reaction tool and parylene-matrix chip could achieve a limit of detection as low as 600 cells/spot for penicillin-G. (C) 2016 Elsevier Inc. All rights reserved. English ELSEVIER SCIENCE INC FLIGHT MASS-SPECTROMETRY AUTODISPLAYED Z-DOMAINS COLI OUTER-MEMBRANE BACTERIAL SUSCEPTIBILITY SPR BIOSENSOR E. COLI IMMOBILIZATION IMMUNOASSAY LAYER FILM Hypersensitive antibiotic susceptibility test based on a beta-lactamase assay with a parylene-matrix chip Article 10.1016/j.enzmictec.2016.11.008 1 ENZYME AND MICROBIAL TECHNOLOGY, v.97, pp.90 - 96 ENZYME AND MICROBIAL TECHNOLOGY 97 90 96 scie scopus 000393542300011 2-s2.0-84999750737 Biotechnology & Applied Microbiology Biotechnology & Applied Microbiology Article FLIGHT MASS-SPECTROMETRY AUTODISPLAYED Z-DOMAINS COLI OUTER-MEMBRANE BACTERIAL SUSCEPTIBILITY SPR BIOSENSOR E. COLI IMMOBILIZATION IMMUNOASSAY LAYER FILM Laser desorption/ionization time-of-flight mass spectrometry (LDI-TOF MS) Parylene-matrix chip Antibiotic susceptibility test beta-lactamase