
The clinical characteristic of eight patients of COVID-19 with positive RT-PCR test after discharge.
- Corona virus disease 2019 (COVID-19) was caused by Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2). The phenomenon of positive real time reverse transcription polymerase chain reaction (RT-PCR) result of SARS-CoV-2 in recovered patients had occurred and the research about these patients was rare.
- In our study, we did a retrospective review of medical records from COVID-19 patients admitted to one ward of Tongji Hospital of Hua Zhong University of Science and Technology from 10 February to 13 April 2020. From 10 February to 13 April 2020, there were 108 patients of COVID-19 admitted in the one ward of Tongji Hospital. Among them, eight cases were readmission patients because the RT-PCR result of SARS-CoV-2 was positive again after discharge. On the second admission, they had no symptoms and their chest CT was almost normal.
- Data from laboratory tests of the re-admission patients showed that all eight patients had normal white blood cell count, lymphocyte count. The inflammatory factors like procalcitonin and interleukin 6 were normal. After treatment, two patients met the standard and were discharged. The other six patients were still in the hospital because their RT-PCR of SARS-CoV-2 did not get three consecutive negative results and the course of two patients had persisted more than 90 days.
- We still needed to be alert that these patients could infect other people as a source of infection, and we also needed to be alert that these patients become chronic virus carriers. It also aroused our concern about the discharge standard of COVID-19. This article is protected by copyright. All rights reserved.

ichs2020
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COVID-19-assoziierte Pneumonie trotz persistierend negativen PCR–Tests aus oropharyngealen Abstrichen.
- A 46-year old construction worker presented at the emergency department with two orthostatic syncopes. The patient complained of prolonged fever and coughs for 7 days which had not improved after oral treatment with sultamicillin for 5 days, prescribed by the patient’s general practitioner. Physical examination showed high blood pressure due to previously known hypertension.
- Other vital signs without pathological findings. Pulmonary auscultation showed basal soft crackling noises of the left lung FINDINGS AND DIAGNOSIS: Laboratory examination showed increased values for LDH, pro-BNP and CRP and normal values for leucocytes and procalcitonin.
- Conventional X-Ray of the chest showed bipulmonal lateral atypical infiltrates. After the first PCR turned in negative another PCR-analysis for SARS-CoV-2 of a deep oral swab-sample was performed since the clinical, laboratory and radiological findings were typical for COVID-19. Again, SARS-CoV-2-RNA was not detected.
- A CT-scan of the chest showed bipulmonal lateral ground-glass attenuation, again typical for COVID-19 associated pneumonia. After a third attempt for a PCR-analysis of a deep oral swab-sample was negative, analysis of a sputum was performed which finally confirmed the diagnosis of COVID-19 associated pneumonia. The patient was admitted for evaluation of syncopes and suspect of COVID-19 associated pneumonia. The patient was prophylactically isolated while the result of SARS-CoV-2-PCR from a deep oral swab was pending.
- Suspecting a possible secondary bacterial infection at the beginning, intravenous antibiotic treatment with ampicillin/sulbactam was initiated. While further examinations showed no indication for bacterial infection, antibiotics were discontinued after 3 days. Due to clinical recovery antiviral therapy was not performed after confirming the diagnosis.
- The patient was discharged 17 days after onset of first symptoms without any requirements for further isolation. This casuistic describes a case of COVID-19 associated pneumonia presenting with typical clinical features, laboratory and radiological findings.
- Detection of viral RNA was not successful from deep oral swab-samples despite repeated attempts. Finally, PCR-analysis of sputum confirmed the diagnosis. Analysis of deeper airway samples (sputum, bronchoalveolar lavage, tracheal secretions) or stool for SARS-CoV-2 should be performed in cases of evident clinical suspicion of COVID-19 and negative PCR results from deep oral swabs
Eztime Real - time PCRPremix 2x,Taqman |
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AZ-1995 | Real Time Primers | 25 Reactions | EUR 183.6 |
Eco 48 Real Time PCR system including software and loading dock |
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MOL6348 | Scientific Laboratory Supplies | EACH | EUR 18466.8 |
Eztime Real - time PCRPremix 2x,SYBR Green |
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FYT103-100P | Yeastern Biotech | 100 Preps 1.25 ml | Ask for price |
Eztime Real - time PCRPremix 2x,SYBR Green |
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FYT103-400P | Yeastern Biotech | 400 Preps 1.25 ml x 4 | Ask for price |
Eztime Real - time PCRPremix 2x,Taqman, ROX |
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FYT105-400P | Yeastern Biotech | 400 Preps 1.25 ml x 4 | Ask for price |
Eztime Real - time PCRPremix 2x,Taqman, ROX |
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FYT106-100P | Yeastern Biotech | 100 Preps 1.25 ml | Ask for price |
Eztime Real - time PCRPremix 2x,SYBRGreen , ROX |
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FYT104-100P | Yeastern Biotech | 100 Preps 1.25 ml | Ask for price |
Eztime Real - time PCRPremix 2x,SYBRGreen , ROX |
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FYT104-400P | Yeastern Biotech | 400 Preps 1.25 ml x 4 | Ask for price |
hsa-mir-521 Real-time RT-PCR Detection Kit |
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20-abx097600 | Abbexa |
|
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Green Dye One Step qRT-PCR Master Mix For Quantitative Real Time PCR With ROX Dye |
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MB1004-100Reactions | BosterBio | 100 Reactions | EUR 392.4 |
Novel Coronavirus COVID-19 (2019-nCoV) Real Time Multiplex RT-PCR Kit (Detection for 3 Genes ) |
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RR-0479-02 | Liferiver | 25 tests/kit | EUR 469.56 |
Description: Novel Coronavirus (2019-nCoV) Real Time Multiplex RT-PCR Kit is used for the qualitative detection of a novel coronavirus, which was identified in 2019 at Wuhan City, Hubei Province, China, in upper respiratory tract specimens (nasopharyngeal extracts, deep cough sputum, etc.) and lower respiratory tract specimens (alveoli irrigation fluid, etc.) by real time PCR systems. It detects N gene, E gene and RdRp gene of 2019-nCoV. RR-0479-02 has been also approverd by CFDA for emergency use and is WHO standard. |
TurboQ Real-time PCR Machine with Laptop |
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MOL2700 | Scientific Laboratory Supplies | EACH | EUR 33836.4 |
dsGreen for Real-Time PCR, 100×, 2 mL |
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61010 | Lumiprobe | 2 mL | EUR 435.6 |
dsGreen for Real-Time PCR, 100×, 5 mL |
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71010 | Lumiprobe | 5 mL | EUR 750 |
dsGreen for Real-Time PCR, 100×, 10 mL |
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81010 | Lumiprobe | 10 mL | EUR 1042.8 |
dsGreen for Real-Time PCR, 100×, 1 mL |
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41010 | Lumiprobe | 1 mL | EUR 298.8 |
Azura PureView 1 Kb DNA Ladder - 100 Lanes |
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AZ-1101 | Real Time Primers | 100 Lanes | EUR 140.4 |
Azura PureView 1 Kb DNA Ladder - 500 Lanes |
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AZ-1105 | Real Time Primers | 500 Lanes | EUR 277.2 |
Azura PureView 1 Kb DNA Ladder - 1000 Lanes |
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AZ-1105-2 | Real Time Primers | 1000 Lanes | EUR 326.4 |
Azura PureView 250bp DNA Ladder - 100 Lanes |
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AZ-1121 | Real Time Primers | 100 Lanes | EUR 140.4 |
Azura PureView 250bp DNA Ladder - 500 Lanes |
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AZ-1125 | Real Time Primers | 500 Lanes | EUR 277.2 |
Azura PureView 250bp DNA Ladder - 1000 Lanes |
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AZ-1125-2 | Real Time Primers | 1000 Lanes | EUR 326.4 |
Azura PureView 100bp DNA Ladder - 100 Lanes |
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AZ-1131 | Real Time Primers | 100 Lanes | EUR 140.4 |
Azura PureView 100bp DNA Ladder - 500 Lanes |
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AZ-1135 | Real Time Primers | 500 Lanes | EUR 277.2 |
Azura PureView 100bp DNA Ladder - 1000 Lanes |
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AZ-1135-2 | Real Time Primers | 1000 Lanes | EUR 326.4 |
Azura PureView 50bp DNA Ladder - 100 Lanes |
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AZ-1151 | Real Time Primers | 100 Lanes | EUR 140.4 |
Azura PureView 50bp DNA Ladder - 500 Lanes |
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AZ-1155 | Real Time Primers | 500 Lanes | EUR 277.2 |
Azura PureView 50bp DNA Ladder - 1000 Lanes |
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AZ-1155-2 | Real Time Primers | 1000 Lanes | EUR 326.4 |
AzuraView GreenFast qPCR Blue Mix Lo Rox - 200 Rxn |
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AZ-2301 | Real Time Primers | 200 Rxn | EUR 214.8 |
AzuraView GreenFast qPCR Blue Mix Lo Rox - 500 Rxn |
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AZ-2305 | Real Time Primers | 500 Rxn | EUR 384 |
AzuraView GreenFast qPCR Blue Mix Lo Rox - 2000 Rxn |
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AZ-2320 | Real Time Primers | 2000 Rxn | EUR 1195.2 |
AzuraView GreenFast qPCR Blue Mix Lo Rox - 5000 Rxn |
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AZ-2325 | Real Time Primers | 5000 Rxn | EUR 2817.6 |
AzuraView GreenFast qPCR Blue Mix Hi Rox - 200 Rxn |
|||
AZ-2401 | Real Time Primers | 200 Rxn | EUR 214.8 |
AzuraView GreenFast qPCR Blue Mix Hi Rox - 500 Rxn |
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AZ-2405 | Real Time Primers | 500 Rxn | EUR 384 |
AzuraView GreenFast qPCR Blue Mix Hi Rox - 2000 Rxn |
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AZ-2420 | Real Time Primers | 2000 Rxn | EUR 1195.2 |
AzuraView GreenFast qPCR Blue Mix Hi Rox - 5000 Rxn |
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AZ-2421 | Real Time Primers | 5000 Rxn | EUR 2817.6 |
Mouse Oxidative Stress Primer Library |
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MOSL-I | Real Time Primers | 1 set | EUR 657.6 |
Mouse T-Cell Receptor Signaling Primer Library |
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MTCR-I | Real Time Primers | 1 set | EUR 657.6 |
Mouse TGF Beta Signaling Primer Library |
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MTGFB-I | Real Time Primers | 1 set | EUR 657.6 |
Mouse Tumor Invasion/Metastasis Primer Library |
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MTIM-I | Real Time Primers | 1 set | EUR 540 |
Mouse Tumor Immunity Primer Library |
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MTIMU-I | Real Time Primers | 1 set | EUR 657.6 |
Mouse p53 Signaling Primer Library |
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MTPS-I | Real Time Primers | 1 set | EUR 540 |
Mouse WNT Signaling Primer Library |
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MWNT-I | Real Time Primers | 1 set | EUR 657.6 |
Mouse Apoptosis Primer Library |
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MPA-I | Real Time Primers | 1 set | EUR 540 |
Mouse Ras Signaling Primer Library |
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MRAS-I | Real Time Primers | 1 set | EUR 657.6 |
Mouse Oncogene Primer Library |
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MONC-I | Real Time Primers | 1 set | EUR 657.6 |
Mouse Integrin Signaling Primer Library |
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MINT-I | Real Time Primers | 1 set | EUR 891.6 |
Mouse Jak/Stat Signaling Primer Library |
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MJAK-I | Real Time Primers | 1 set | EUR 774 |
Mouse MAP Kinase Signaling Primer Library |
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MMAP-I | Real Time Primers | 1 set | EUR 657.6 |
Mouse Myeloid Derived Suppressor Cell Primer Library |
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MMDSC-I | Real Time Primers | 1 set | EUR 657.6 |
Mouse NFKappaB Primer Library |
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MNFKB-I | Real Time Primers | 1 set | EUR 540 |
Mouse Notch Signaling Primer Library |
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MNOT-I | Real Time Primers | 1 set | EUR 657.6 |
Mouse Neurotransmitter Signaling Primer Library |
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MNTS-I | Real Time Primers | 1 set | EUR 657.6 |
Human T-Cell Anergy/Immune Tolerance Primer Library |
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HTAIT-I | Real Time Primers | 1 set | EUR 657.6 |
Human T-Cell Receptor Signaling Primer Library |
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HTCR-I | Real Time Primers | 1 set | EUR 657.6 |
Human T-Cell Development and Differentiation Primer Library |
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HTDD-I | Real Time Primers | 1 set | EUR 657.6 |
Human TGF Beta Signaling Primer Library |
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HTGFB-I | Real Time Primers | 1 set | EUR 657.6 |
Human Th1 and Th2 Cell Differentiation Primer Library |
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HTHD-I | Real Time Primers | 1 set | EUR 657.6 |
Human Tumor Invasion/Metastasis Primer Library |
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HTIM-I | Real Time Primers | 1 set | EUR 540 |
Human Tumor Immunity Primer Library |
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HTIMU-I | Real Time Primers | 1 set | EUR 657.6 |
Human Toll-like Receptor Signaling Primer Library |
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HTLR-I | Real Time Primers | 1 set | EUR 657.6 |
Human TNF Signaling Primer Library |
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HTNF-I | Real Time Primers | 1 set | EUR 657.6 |
Human p53 Signaling Primer Library |
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HTPS-I | Real Time Primers | 1 set | EUR 540 |
Human VEGF Signaling Primer Library |
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HVEGF-I | Real Time Primers | 1 set | EUR 657.6 |
Human WNT Signaling Primer Library |
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HWNT-I | Real Time Primers | 1 set | EUR 657.6 |
Human Cytoskeleton Primer Library |
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HSCK-I | Real Time Primers | 1 set | EUR 774 |
Human Stem Cell Primer Library |
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HSCL-I | Real Time Primers | 1 set | EUR 540 |
Human SMAD Signaling Primer Library |
|||
HSMAD-I | Real Time Primers | 1 set | EUR 657.6 |
Human Statin Signaling Library |
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HSTAT-I | Real Time Primers | 1 set | EUR 657.6 |
Human Signal Transduction Primer Library |
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HSTL-I | Real Time Primers | 1 set | EUR 540 |
Human DNA Repair Primer Library I |
|||
HDRL-I | Real Time Primers | 1 set | EUR 657.6 |
Human DNA Repair Primer Library II |
|||
HDRL-II | Real Time Primers | 1 set | EUR 657.6 |
Human Drug Transporter I Primer Library |
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HDTP-I | Real Time Primers | 1 set | EUR 657.6 |
Human Drug Detoxication I |
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HDTX-I | Real Time Primers | 1 set | EUR 657.6 |
Human Drug Detoxication II |
|||
HDTX-II | Real Time Primers | 1 set | EUR 774 |
Human Actin Cytoskeleton Signaling Primer Library |
|||
HACS-I | Real Time Primers | 1 set | EUR 657.6 |
Human Adipogenesis Primer Library |
|||
HADG-I | Real Time Primers | 1 set | EUR 657.6 |
Human Adaptive & Innate Immune Response Primer Library |
|||
HAIIR-I | Real Time Primers | 1 set | EUR 657.6 |
Human PI3K-AKT Signaling Primer Library |
|||
HAKT-I | Real Time Primers | 1 set | EUR 540 |
Human Amino Acid Metabolism Primer Library |
|||
HAMM-I | Real Time Primers | 1 set | EUR 774 |
Human Androgen Signaling Primer Library |
|||
HAND-I | Real Time Primers | 1 set | EUR 657.6 |
Human Angiogenesis Primer Library |
|||
HAPL-I | Real Time Primers | 1 set | EUR 540 |
Human Antigen Processing and Presentation Primer Library |
|||
HAPP-I | Real Time Primers | 1 set | EUR 657.6 |