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Tsai HP, Yeh CS, Lin IT, Ko WC, Wang JR. Increasing Cytomegalovirus Detection Rate from Respiratory Tract Specimens by a New Laboratory-Developed Automated Molecular Diagnostic Test. Microorganisms 2020; 8:microorganisms8071063. [PMID: 32708818 PMCID: PMC7409230 DOI: 10.3390/microorganisms8071063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 07/12/2020] [Accepted: 07/13/2020] [Indexed: 11/16/2022] Open
Abstract
Lots of automated molecular methods for detecting cytomegalovirus (CMV) DNA in the blood are available, but seldom for various clinical specimens. This study was designed to establish a highly sensitive automated assay to detect CMV DNA in non-blood specimens. We designed a new QMT assay using QIAGEN artus CMV RG polymerase chain reaction (Q-CMV PCR) kit applied on the BD MAX system and compared with the other assays, including an RGQ assay (LabTurbo auto-extraction combined Q-CMV PCR kit on Rotor-Gene-Q instrument), and in-house PCR assay. A total of 1067 various clinical samples, including 426 plasma, 293 respiratory tract specimens (RTS), 127 stool, 101 cerebral spinal fluid, 90 vitreous humours were analysed. Examining CMV DNA in simultaneous specimens of the same immunocompromised patient with respiratory symptoms, the detection rate of RTS (93.6%, 88/94) was significant higher than plasma (65.9%, 62/94). The positive rates for plasma samples with a low CMV viral load (<137 IU/mL) and diagnostic sensitivity of QMT, RGQ, and in-house assays were 65% and 99.1%, 45% and 100%, 5% and 65.5%, respectively. The QMT assay performs better, with shorter operational and turnaround time than the other assays, enabling the effective and early detection of CMV infection in various clinical specimens, particularly for RTS.
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Affiliation(s)
- Huey-Pin Tsai
- Department of Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan; (C.-S.Y.); (I.-T.L.)
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
- Correspondence: (H.-P.T.); (J.-R.W.); Tel.: +886-6-2353535 (ext. 2653) (H.-P.T.); Fax: +886-6-2094937 (H.-P.T.); Tel./Fax: +886-6-2760695 (J.-R.W.)
| | - Chun-Sheng Yeh
- Department of Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan; (C.-S.Y.); (I.-T.L.)
| | - I-Ting Lin
- Department of Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan; (C.-S.Y.); (I.-T.L.)
| | - Wen-Chien Ko
- Division of Infectious Diseases, Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan;
- Department of Internal Medicine, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
| | - Jen-Ren Wang
- Department of Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan; (C.-S.Y.); (I.-T.L.)
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
- Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan 701, Taiwan
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Tainan 704, Taiwan
- Correspondence: (H.-P.T.); (J.-R.W.); Tel.: +886-6-2353535 (ext. 2653) (H.-P.T.); Fax: +886-6-2094937 (H.-P.T.); Tel./Fax: +886-6-2760695 (J.-R.W.)
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Hu J, Huang R, Wang Y, Wei X, Wang Z, Geng Y, Jing J, Gao H, Sun X, Dong C, Jiang C. Development of duplex PCR-ELISA for simultaneous detection of Salmonella spp. and Escherichia coli O157: H7 in food. J Microbiol Methods 2018; 154:127-133. [PMID: 30393180 DOI: 10.1016/j.mimet.2018.10.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 10/26/2018] [Indexed: 11/28/2022]
Abstract
In the current study, a duplex PCR-ELISA method was developed targeting the specific genes, invA of Salmonella spp. and rfbE of Escherichia coli O157: H7, to detect one or both bacteria in food. In brief, PCR product amplified by PCR primer labeled with digoxin at the 5'-end and a probe labeled with biotin at the 3'-end can form dimer by nucleic acid hybridization which can be captured by binding of biotin to streptomycin coated in ELISA plate before using enzyme-labeled anti-digoxin antibody and substrate to develop color. Also, evaluation of the duplex PCR-ELISA method was conducted in different food samples including milk, juice, cabbage, shrimp, chicken, pork and beef. Results indicated that the duplex PCR-ELISA developed here was specific when using 25 non-target bacteria strains as controls and was sensitive with a limit of detection (LOD) of 1 CFU/mL, 1, 000 times higher than that of the duplex PCR method and was repeatable regardless of inter- and intra-batch variations. The duplex PCR-ELISA method established in the present study has proven to be highly specific, sensitive and repeatable. It has the potential to be applied in such fields as clinical diagnosis of food-borne diseases, food hygiene monitoring and pathogen detection in food.
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Affiliation(s)
- Jinqiang Hu
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China; Collaborative Innovation Center of Food Production and Safety, Zhengzhou 450000, Henan Province, China; Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou 450000, Henan Province, China.
| | - Runna Huang
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Yi Wang
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Xiangke Wei
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Zhangcun Wang
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Yao Geng
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China
| | - Jianzhou Jing
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China
| | - Hui Gao
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China
| | - Xincheng Sun
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China; International Joint Laboratory of Food Safety, Zhengzhou 450000, Henan Province, China
| | - Caiwen Dong
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
| | - Chunpeng Jiang
- School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450000, Henan Province, China
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