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Haque F, Fisseha S, Athamanolap P, Tower R, Ortega J, Dominguez C, Maruca T, Torpey D, Myers R, Laksanalamai P. Reduction of the Carbapenemase Inactivation Method (CIM) assay time by real-time PCR. J Microbiol Methods 2020; 178:106072. [PMID: 33031896 DOI: 10.1016/j.mimet.2020.106072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 09/29/2020] [Accepted: 09/30/2020] [Indexed: 11/16/2022]
Abstract
Carbapenemase Inactivation Method (CIM) is a test to detect presence of the carbapenemase in Gram-negative bacteria. Determination of the carbapenemase production by inactivation of meropenem requires that a zone of control E. coli inhibition be measured approximately 6-24 h after plating. We have modified the CIM test by developing a rapid method which instead measures the growth of E. coli indicator strain ATCC 25922 using real-time PCR, referred to as a nucleic acid testing CIM (natCIM). Our natCIM, therefore reduces the detecting time from 6 to 24 h to approximately 4 h.
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Affiliation(s)
- F Haque
- Maryland Department of Health, Laboratories Administration, 1770 Ashland Ave., Baltimore, MD 21205, United States of America
| | - S Fisseha
- Maryland Department of Health, Laboratories Administration, 1770 Ashland Ave., Baltimore, MD 21205, United States of America
| | - P Athamanolap
- Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, 999 Phuttamonthon4 Road, Salaya, Nakhon Pathom 73170, Thailand
| | - R Tower
- Maryland Department of Health, Laboratories Administration, 1770 Ashland Ave., Baltimore, MD 21205, United States of America
| | - J Ortega
- Maryland Department of Health, Laboratories Administration, 1770 Ashland Ave., Baltimore, MD 21205, United States of America
| | - C Dominguez
- Maryland Department of Health, Laboratories Administration, 1770 Ashland Ave., Baltimore, MD 21205, United States of America
| | - T Maruca
- Maryland Department of Health, Laboratories Administration, 1770 Ashland Ave., Baltimore, MD 21205, United States of America
| | - D Torpey
- Maryland Department of Health, Laboratories Administration, 1770 Ashland Ave., Baltimore, MD 21205, United States of America
| | - R Myers
- Maryland Department of Health, Laboratories Administration, 1770 Ashland Ave., Baltimore, MD 21205, United States of America
| | - P Laksanalamai
- Maryland Department of Health, Laboratories Administration, 1770 Ashland Ave., Baltimore, MD 21205, United States of America.
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Shin DJ, Athamanolap P, Chen L, Hardick J, Lewis M, Hsieh YH, Rothman RE, Gaydos CA, Wang TH. Mobile nucleic acid amplification testing (mobiNAAT) for Chlamydia trachomatis screening in hospital emergency department settings. Sci Rep 2017; 7:4495. [PMID: 28674410 PMCID: PMC5495747 DOI: 10.1038/s41598-017-04781-8] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 05/22/2017] [Indexed: 11/30/2022] Open
Abstract
Management of curable sexually-transmitted infections (STI) such as Chlamydia can be revolutionized by highly sensitive nucleic acid testing that is deployable at the point-of-care (POC). Here we report the development of a mobile nucleic acid amplification testing (mobiNAAT) platform utilizing a mobile phone and droplet magnetofluidics to deliver NAAT in a portable and accessible format. By using magnetic particles as a mobile substrate for nucleic acid capture and transport, fluid handling is reduced to particle translocation on a simple magnetofluidic cartridge assembled with reagents for nucleic acid purification and amplification. A mobile phone user interface operating in tandem with a portable Bluetooth-enabled cartridge-processing unit facilitates process integration. We tested 30 potentially Chlamydia trachomatis (CT)-infected patients in a hospital emergency department and confirmed that mobiNAAT showed 100% concordance with laboratory-based NAAT. Concurrent evaluation by a nontechnical study coordinator who received brief training via an embedded mobile app module demonstrated ease of use and reproducibility of the platform. This work demonstrates the potential of mobile nucleic acid testing in bridging the diagnostic gap between centralized laboratories and hospital emergency departments.
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Affiliation(s)
- D J Shin
- Department of Biomedical Engineering, The Johns Hopkins University, Baltimore, MD, 21218, USA
| | - P Athamanolap
- Department of Biomedical Engineering, The Johns Hopkins University, Baltimore, MD, 21218, USA
| | - L Chen
- Department of Mechanical Engineering, The Johns Hopkins University, Baltimore, MD, 21218, USA
| | - J Hardick
- Division of Infectious Diseases, School of Medicine, The Johns Hopkins University, Baltimore, MD, 21218, USA
| | - M Lewis
- Department of Emergency Medicine, School of Medicine, The Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Y H Hsieh
- Department of Emergency Medicine, School of Medicine, The Johns Hopkins University, Baltimore, MD, 21218, USA
| | - R E Rothman
- Division of Infectious Diseases, School of Medicine, The Johns Hopkins University, Baltimore, MD, 21218, USA
- Department of Emergency Medicine, School of Medicine, The Johns Hopkins University, Baltimore, MD, 21218, USA
| | - C A Gaydos
- Division of Infectious Diseases, School of Medicine, The Johns Hopkins University, Baltimore, MD, 21218, USA
- Department of Emergency Medicine, School of Medicine, The Johns Hopkins University, Baltimore, MD, 21218, USA
| | - T H Wang
- Department of Biomedical Engineering, The Johns Hopkins University, Baltimore, MD, 21218, USA.
- Department of Mechanical Engineering, The Johns Hopkins University, Baltimore, MD, 21218, USA.
- Institute for NanoBioTechnology, The Johns Hopkins University, Baltimore, MD, 21218, USA.
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Shin DJ, Athamanolap P, Chen L, Hardick J, Gaydos CA, Wang TH. 002.6 A low-cost mobile naat platform for chlamydia trachomatis. Br J Vener Dis 2015. [DOI: 10.1136/sextrans-2015-052270.90] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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