scholarly journals Persistent Positivity of Reverse Transcriptase-Polymerase Chain Reaction Test among Patients with COVID-19 in Rural Teaching Hospital: A Descriptive Cross-sectional Study

2021 ◽  
Vol 59 (243) ◽  
pp. 1136-1140
Author(s):  
Narayani Maharjan ◽  
Niresh Thapa ◽  
Bibek Pun Magar ◽  
Muna Maharjan ◽  
Jiancheng Tu
Keyword(s):  
Polymerase Chain Reaction ◽  
Reverse Transcriptase ◽  
Teaching Hospital ◽  
Cross Sectional Study ◽  
Polymerase Chain Reaction Test ◽  
Chain Reaction ◽  
Cross Sectional ◽  
Reaction Test ◽  
Polymerase Chain ◽  
Chain Reaction Test

Introduction: The persistence positivity detected for severe acute respiratory syndrome coronavirus 2 ribonucleic acid by real-time reverse transcriptase-polymerase chain reaction test in asymptomatic coronavirus disease 2019 positive patients has attracted a lot of attention. There is limited data on the duration of viral shedding. We aimed to determine the proportion of coronavirus disease patients with persistent positivity of real-time reverse transcriptase-polymerase chain reaction test in a teaching hospital of Nepal. Methods: A descriptive cross-sectional study was conducted using medical records from May to September 2020 in a teaching hospital of Nepal. The study was approved by the Institutional Review Committee of Karnali Academy of Health Sciences (Reference no 077/078/03). Convenient sampling method was used. Data was analysed by Statistical Package for the Social Sciences. Point estimate at 90% Confidence Interval was calculated along with frequency and proportion for binary data. Results: Of the total 95 cases, 9 (9.5%) cases (4.6-14.4 at 90% Confidence Interval), were repeat positive after achieving the first negative. The mean day required of achieving the last negative for the repeat positive group was 62.11±3.95, range (60-70 days). The mean time duration for the virus shedding was found to be 20.43±12.19 days (range 7-60 days) after the first positive test result. Conclusions: This study concludes that there might be a persistent positivity of the polymerase chain reaction test among patients with COVID-19. The majority of the patients were test positive for 8-14 days, and some were positive till 60-70 days.

scholarly journals COVID-19 Diagnosed by Real-Time Reverse Transcriptase-Polymerase Chain Reaction in Nasopharyngeal Specimens of Suspected Cases in a Tertiary Care Center: A Descriptive Cross-sectional Study

2021 ◽  
Vol 59 (237) ◽  
Author(s):  
Narayani Maharjan ◽  
Niresh Thapa ◽  
Bibek Pun Magar ◽  
Muna Maharjan ◽  
Jiancheng Tu
Keyword(s):  
Polymerase Chain Reaction ◽  
Reverse Transcriptase ◽  
Real Time ◽  
Care Center ◽  
Tertiary Care ◽  
Polymerase Chain Reaction Test ◽  
Chain Reaction ◽  
Reaction Test ◽  
Polymerase Chain ◽  
Chain Reaction Test

Introduction: The emergence of severe acute respiratory syndrome coronavirus-2 pandemic is critically challenging the whole world. The real-time reverse transcriptase-polymerase chain reaction is the most widely used confirmatory test for COVID-19 detection. This study aimed to find out the prevalence of COVID-19 infection detected by gold standard reverse transcriptase-polymerase chain reaction test in a tertiary care center of Nepal. Methods: A descriptive cross-sectional study was conducted in Karnali Academy of Health Sciences from May to August 2020 after taking ethical approval from the Institutional Review Committee of Karnali Academy of Health Sciences, Jumla. Convenient sampling was used. A total of 361 participants enrolled in this study who have done real-time reverse transcriptase-polymerase chain reaction for screening of COVID-19 infection. Also, a designated questionnaire was obtained from persons with a travel history and close contact. Statistical Package for the Social Sciences software was used for the statistical analysis. Point estimate at 95% Confidence Interval was calculated along with frequency and proportion for binary data. Results: The prevalence of COVID-19 was 167 (46.3%) (95% Confidence Interval= 41.16-51.44) by real-time reverse transcriptase-polymerase chain reaction test. Out of 361 samples, 339 (93.9%) were male and 22 (6%) were female. The highest frequency of the participants belongs to the age groups of 20-40 years. Conclusions: The findings showed a high prevalence of COVID-19 detected by reverse transcriptase-polymerase chain reaction test. Further studies are necessary to improve the precision of prevalence estimations.

scholarly journals Clinical Evaluation of a 16S Ribosomal RNA Polymerase Chain Reaction Test for the Diagnosis of Lymph Node Tuberculosis

2006 ◽  
Vol 43 (7) ◽  
pp. 855-859 ◽  
Author(s):  
Fernando Osores ◽  
Oscar Nolasco ◽  
Kristien Verdonck ◽  
Jorge Arevalo ◽  
Juan Carlos Ferrufino ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Lymph Node ◽  
Rna Polymerase ◽  
Ribosomal Rna ◽  
Polymerase Chain Reaction Test ◽  
Chain Reaction ◽  
Reaction Test ◽  
Polymerase Chain ◽  
Lymph Node Tuberculosis ◽  
Chain Reaction Test

Polymerase Chain Reaction for the Direct Detection of Brucella spp. in Milk and Cheese

2001 ◽  
Vol 64 (2) ◽  
pp. 164-167 ◽  
Author(s):  
G. TANTILLO ◽  
A. DI PINTO ◽  
A. VERGARA ◽  
C. BUONAVOGLIA
Keyword(s):  
Polymerase Chain Reaction ◽  
Direct Detection ◽  
Polymerase Chain Reaction Test ◽  
Chain Reaction ◽  
Sheep Milk ◽  
Reaction Test ◽  
Polymerase Chain ◽  
Quality Of Milk ◽  
Chain Reaction Test

A polymerase chain reaction test was developed to detect Brucella spp. directly in milk and cheese and optimized using primers for the BSCP-31 gene. A total of 46 cheese samples produced with sheep and goats milk were assayed, and Brucella spp. was detected in 46% of them, especially in cheese made from sheep milk. This method is of remarkable epidemiologic interest because it is an indirect test indicating the sanitary quality of milk used in dairy industries. The method showed good sensitivity and specificity. It is faster and less expensive than the conventional bacteriological assays.

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