Journal of the Medical Sciences (Berkala Ilmu Kedokteran)
Vol 54, No 3 (2022)

A comparison study of GeneXpert and In-House N1N2 CDC Real-Time RT-PCR for detection of SARS-CoV-2 infection

Andi Yasmon (Department of Microbiology, Faculty of Medicine Universitas Indonesia/Cipto Mangunkusumo Hospital, Jakarta)
Lola Febriana Dewi (Department of Microbiology, Faculty of Medicine Universitas Indonesia/Cipto Mangunkusumo Hospital, Jakarta)
Fithriyah Fithriyah (Department of Microbiology, Faculty of Medicine Universitas Indonesia/Cipto Mangunkusumo Hospital, Jakarta)
Ariyani Kiranasari (Department of Clinical Microbiology, Faculty of Medicine, Krida Wacana Christian University, Jakarta)
Andriansjah Rukmana (Department of Microbiology, Faculty of Medicine Universitas Indonesia/Cipto Mangunkusumo Hospital, Jakarta)
Yulia Rosa Saharman (Department of Biology, Faculty of Information Technology and Science, Hindu University of Indonesia, East Denpasar, Bali)
Fera Ibrahim (Department of Biology, Faculty of Information Technology and Science, Hindu University of Indonesia, East Denpasar, Bali)
Pratiwi Sudarmono (Department of Biology, Faculty of Information Technology and Science, Hindu University of Indonesia, East Denpasar, Bali)



Article Info

Publish Date
28 Nov 2022

Abstract

COVID-19 is a disease caused by SARS-CoV-2, a new virus from genus β-coronaviruses. This disease has been declared a pandemic by WHO on 11 March 2020 until now. The nucleic acid tests are the most frequently used assays because of their high sensitivity and specificity. One of the tests is the GeneXpert, a real-time reverse transcription polymerase chain reaction (rRT-PCR)-based assay platform. The use of the GeneXpert shows great public health interest because of the rapid (50 min), the minimum number of trained staff, and less infrastructure and equipment. However, there are limited data on the application of the GeneXpert for the detection of SARS-CoV-2. Therefore, we conducted a comparative study between the GeneXpert and in-house N1N2 CDC rRT-PCR assay. Of 86 samples, 17 were rRT-PCR positive while 13 were GeneXpert positive. Of rRT-PCR positive 17 samples, 7 were GeneXpert negative [58.82% (10/17] sensitivity]. We also found that 3 GeneXpert positive samples showed rRT-PCR negative (95.65% [66/69] specificity). It is concluded that negative results by the GeneXpert can not rule out the possibility of SARS-CoV-2 infection, particularly in close-contact individuals and the interpretation of the positive result should be analyzed carefully, particularly amplification with Ct>40.

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Journal Info

Abbrev

bik

Publisher

Subject

Immunology & microbiology Neuroscience

Description

Journal of the Medical Sciences (JMedSci) or Berkala Ilmu Kedokteran (BIK) is an international, open-access, and double-blind peer-reviewed journal, published by Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada Yogyakarta Indonesia. JMedSci aiming to communicate high-quality ...