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Li Y, Zhao L, Wang J, Qi P, Yang Z, Zou X, Peng F, Li S. A new application of multiplex PCR combined with membrane biochip assay for rapid detection of 9 common pathogens in sepsis. PeerJ 2023; 11:e15325. [PMID: 37197582 PMCID: PMC10184654 DOI: 10.7717/peerj.15325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 04/10/2023] [Indexed: 05/19/2023] Open
Abstract
Rapid and accurate identification of specific sepsis pathogens is critical for patient treatment and disease control. This study aimed to establish a new application for the rapid identification of common pathogens in patients with suspected sepsis and evaluate its role in clinical application. A multiplex PCR assay was designed to simultaneously amplify specific conserved regions of nine common pathogenic microorganisms in sepsis, including Acinetobacter baumannii, Escherichia coli, Klebsiella pneumonia, Pseudomonas aeruginosa, Enterococcus faecalis, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus pneumonia, and Candida albicans. The PCR products were analyzed by a membrane biochip. The analytical sensitivity of the assay was determined at a range of 5-100 copies/reaction for each standard strain, and the detection range was 20-200 cfu/reaction in a series dilution of simulated clinical samples at different concentrations. Out of the 179 clinical samples, the positive rate for pathogens detected by the membrane biochip assay and blood culture method was 20.11% (36/179) and 18.44% (33/179), respectively. However, by comparing the positive rate of the nine common pathogens we detected, the membrane biochip assay tended to be more sensitive than the blood culture method (20.11% vs 15.64%). The clinical sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of the membrane biochip assay were 92.9%, 93.2%, 72.2% and 98.6%, respectively. Generally, this multiplex PCR combined membrane biochip assay can be used to detect major sepsis pathogens, and is useful for early initiation of effective antimicrobial treatment, and is feasible for sepsis pathogens identification in routine clinical practice.
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Affiliation(s)
- Yun Li
- School of Basic Medical Sciences, Weifang Medical University, Weifang, China
| | - LuJie Zhao
- School of Basic Medical Sciences, Weifang Medical University, Weifang, China
| | - Jingye Wang
- Department of Pathology, Weifang Maternal and Child Health Care Hospital, Weifang, China
| | - Peipei Qi
- The Third Department of Neurology Weifang People’s Hospital, Weifang, China
| | - Zhongfa Yang
- School of Basic Medical Sciences, Weifang Medical University, Weifang, China
| | - Xiangyu Zou
- School of Basic Medical Sciences, Weifang Medical University, Weifang, China
| | - Fujun Peng
- School of Basic Medical Sciences, Weifang Medical University, Weifang, China
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Rubtsova MY, Filippova AA, Fursova NK, Grigorenko VG, Presnova GV, Ulyashova MM, Egorov AM. Quantitative Determination of Beta-Lactamase mRNA in the RNA Transcripts of Antibiotic-Resistant Bacteria Using Colorimetric Biochips. JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1134/s1061934822050124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chen C, Wang P, Zhang L. A two-thresholds policy for a Filippov model in combating influenza. J Math Biol 2020; 81:435-461. [PMID: 32588119 DOI: 10.1007/s00285-020-01514-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 06/13/2020] [Indexed: 11/29/2022]
Abstract
This work designs a two-thresholds policy for a Filippov model in combating influenza, so as to estimate when and whether to take control strategies, including the media coverage, antiviral treatment of infected individuals and vaccination of susceptible population. By introducing two tolerance thresholds [Formula: see text] and [Formula: see text] of susceptible and infected individuals, the two-thresholds policy is designed as: a vaccination program is implemented when the number of susceptible individuals is above [Formula: see text]; an antiviral treatment strategy is taken and the mass media begins to report information about influenza when the infection number is larger than [Formula: see text]; no control strategies are required in other cases. Furthermore, the global dynamics of the model are analyzed by varying these two thresholds, including the existence and dynamics of sliding mode, and the existence and global stability of equilibrium. It is shown that the model solutions ultimately converge to a pseudoequilibrium or a pseudoattractor on the switching surface, or a real equilibrium. The obtained results indicate that, by choosing susceptible and infected thresholds properly, the infection number can be remained below or at an acceptable level.
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Affiliation(s)
- Can Chen
- School of Mathematics, Zhengzhou University of Aeronautics, Zhengzhou, 450046, China.
| | - Pengde Wang
- College of Mathematics and Information Science, Henan University of Economics and Law, Zhengzhou, 450046, China
| | - Litao Zhang
- School of Mathematics, Zhengzhou University of Aeronautics, Zhengzhou, 450046, China
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Toth E, Dawson ED, Taylor AW, Stoughton RS, Blair RH, Johnson JE, Slinskey A, Fessler R, Smith CB, Talbot S, Rowlen K. FluChip-8G Insight: HA and NA subtyping of potentially pandemic influenza A viruses in a single assay. Influenza Other Respir Viruses 2019; 14:55-60. [PMID: 31608599 PMCID: PMC6928037 DOI: 10.1111/irv.12683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 07/26/2019] [Accepted: 09/11/2019] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Global influenza surveillance in humans and animals is a critical component of pandemic preparedness. The FluChip-8G Insight assay was developed to subtype both seasonal and potentially pandemic influenza viruses in a single assay with a same day result. FluChip-8G Insight uses whole gene segment RT-PCR-based amplification to provide robustness against genetic drift and subsequent microarray detection with artificial neural network-based data interpretation. OBJECTIVES The objective of this study was to verify and validate the performance of the FluChip-8G Insight assay for the detection and positive identification of human and animal origin non-seasonal influenza A specimens. METHODS We evaluated the ability of the FluChip-8G Insight technology to type and HA and NA subtype a sample set consisting of 297 results from 180 unique non-seasonal influenza A strains (49 unique subtypes). RESULTS FluChip-8G Insight demonstrated a positive percent agreement ≥93% for 5 targeted HA and 5 targeted NA subtypes except for H9 (88%), and negative percent agreement exceeding 95% for all targeted subtypes. CONCLUSIONS The FluChip-8G Insight neural network-based algorithm used for virus identification performed well over a data set of 297 naïve sample results, and can be easily updated to improve performance on emerging strains without changing the underlying assay chemistry.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Catherine B Smith
- Influenza Division, the Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Sarah Talbot
- Influenza Division, the Centers for Disease Control and Prevention, Atlanta, GA, USA
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Abstract
Influenza pandemics with different extent occur every year in the world. It can cause high morbidity and mortality, arouse fear panic in public, and attract extensive attention worldwide. This paper reviews the research progress in epidemiological characteristics, detection methods, pathogenesis, treatment and prophylactic measures of influenza in China. It will be helpful for us to understand the current situation of influenza.
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Chen J, Ye C, Liu Z, Yang L, Liu A, Zhong G, Peng H, Lin X. Facilely prepared low-density DNA monolayer-based electrochemical biosensor with high detection performance in human serum. Anal Bioanal Chem 2019; 411:2101-2109. [PMID: 30790017 DOI: 10.1007/s00216-019-01637-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 01/14/2019] [Accepted: 01/22/2019] [Indexed: 02/07/2023]
Abstract
Presently, most reported electrochemical biosensors, for highly sensitive and selective detection of nucleic acid, still require multiple, time-consuming assembly steps and high-consumption DNA probes as well as lack good performance in human serum, which greatly limit their applicability. Herein, an easy-to-fabricate electrochemical DNA biosensor constructed by assembly of bovine serum albumin (BSA) followed with direct incubation of amplified products has been proposed. This method combined terminal deoxynucleoside transferase (TdTase)-mediated isothermal amplification and polyHRP catalysis to achieve dual-signal enhancement, and was featured with low-density DNA monolayer for its employment of only 2 nM capture probes. Surprisingly, based on the low-density DNA monolayer, the steric hindrance effect of polyHRP could effectively restrain the background compared with HRP, which further pushes the signal-to-noise (S/N) ratio to 70 than that of most currently available methods. Additionally, this strategy also showed favorable specificity and powerful anti-interference in human serum, and thus potentially attractive for diagnosis of diseases.
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Affiliation(s)
- Jinyuan Chen
- The Centralab, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, Fujian, China
| | - Chenliu Ye
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, 350004, Fujian, China
| | - Zhoujie Liu
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, 350004, Fujian, China
| | - Liangyong Yang
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, 350004, Fujian, China
| | - Ailin Liu
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, 350004, Fujian, China
| | - Guangxian Zhong
- Department of Orthopaedics, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, Fujian, China.
| | - Huaping Peng
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, 350004, Fujian, China.
| | - Xinhua Lin
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, 350004, Fujian, China.
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Zhang H, Liu X, Liu M, Gao T, Huang Y, Liu Y, Zeng W. Gene detection: An essential process to precision medicine. Biosens Bioelectron 2018; 99:625-636. [DOI: 10.1016/j.bios.2017.08.033] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 08/12/2017] [Indexed: 01/08/2023]
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A Filippov model describing the effects of media coverage and quarantine on the spread of human influenza. Math Biosci 2017; 296:98-112. [PMID: 29273381 DOI: 10.1016/j.mbs.2017.12.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 12/02/2017] [Accepted: 12/08/2017] [Indexed: 12/11/2022]
Abstract
Mass-media reports on an epidemic or pandemic have the potential to modify human behaviour and affect social attitudes. Here we construct a Filippov model to evaluate the effects of media coverage and quarantine on the transmission dynamics of influenza. We first choose a piecewise smooth incidence rate to represent media reports being triggered once the number of infected individuals exceeds a certain critical level [Formula: see text] . Further, if the number of infected cases increases and exceeds another larger threshold value [Formula: see text] ( [Formula: see text] ), we consider that the incidence rate tends to a saturation level due to the protection measures taken by individuals; meanwhile, we begin to quarantine susceptible individuals when the number of susceptible individuals is larger than a threshold value Sc. Then, for each susceptible threshold value Sc, the global properties of the Filippov model with regard to the existence and stability of all possible equilibria and sliding-mode dynamics are examined, as we vary the infected threshold values [Formula: see text] and [Formula: see text] . We show generically that the Filippov system stabilizes at either the endemic equilibrium of the subsystem or the pseudoequilibrium on the switching surface or the endemic equilibrium [Formula: see text] depending on the choice of the threshold values. The findings suggest that proper combinations of infected and susceptible threshold values can maintain the number of infected individuals either below a certain threshold level or at a previously given level.
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