Abstract Severe acute respiratory syndrome coronavirus 2 causing disease 2019 pandemic is an enveloped virus, showing genome similarity with bat coronavirus. This virus initially infects the upper tract, subsequent spread to lower tract. Despite availability of antigen and antibody detection methods, reverse transcription-polymerase chain reaction (RT-PCR) diagnostic test choice for this novel ...

........................................................................................................................................... IX 1. GENERAL INTRODUCTION .......................................................................................................... 1 2. LITERATURE REVIEW .......................................................................................................

Reverse transcriptase-PCR (RT-PCR) is a powerful tool for gene expression analysis at the RNA level, primarily due to its sensitivity, speed, ease of use, and versatility. In a typical RT-PCR procedure, a reverse transcriptase is used to generate a complementary DNA (cDNA) copy of RNA molecules, followed by polymerase chain reaction (PCR) to amplify the cDNA. Since the PCR process part is usual...

Objective: Reverse transcriptase loop-mediated isothermal amplification (RT-LAMP) is one of the time-saving, accurate, and cost-effective alternative methods to real-time polymerase chain reaction (RT-PCR). This study aimed identify robustness a colorimetric RT-LAMP assay kit that we developed, detecting SARS-COV-2 viral RNA within 30 minutes using primer set special N gene against RT-PCR, gold...

macrophage colony stimulating factor (m-csf) has previously been shown to affect the differentiation of cells of the mono-nuclear phagocytic line. more recent studies indicate that m-csf may have a role in pregnancy. in the present study, the expression of m-csf in the human placenta was demonstrated. placental mrna was isolated and used as template for synthesis of complementary dna (cdna). th...

Real-time reverse transcription polymerase chain reaction (RT-PCR) tests for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are occasionally repeated when clinicians suspect false-negative results, but the conditions under which RT-PCR testing is warranted remain unclear. We evaluated practice of repeat SARS-CoV-2 in 45 patients who were retested after an initial negative PCR test...

A traditional single-stage reverse transcription-polymerase chain reaction (RT-PCR) procedure is effective in determining West Nile (WN) virus in avian tissue and infected cell cultures. However, the procedure lacks the sensitivity to detect WN virus in equine tissue. We describe an RT-nested PCR (RT-nPCR) procedure that identifies the North American strain of WN virus directly in equine and av...

The reverse transcription polymerase chain reaction (RT-PCR), reverse passive haemagglutination assay (RPHA) and agar gel precipitation test (AGPT) were compared for the detection of infectious bursal disease virus (IBDV) in various organs of experimentally infected broilers. RT-PCR and RPHA required a time of 8 and 1 hour, respectively, whereas AGPT showed precipitation reaction at least after...

Purpose: Prove that Computed Tomography (CT) is a more effective diagnostic tool for diagnosing Coronavirus Disease 2019 (COVID-19) in comparison with Reverse Transcription Polymerase Chain Reaction (RT-PCR) due to its higher sensitivity.
 Methods and materials: A total of 200 cases had records chest CT scans RT-PCR tests were collected from Palestinian governmental hospitals September Nov...

ObjectiveTo screen pregnant women at risk of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection during delivery using reverse-transcription polymerase chain reaction (RT-PCR) test and serum immunoglobulin (Ig) testing.MethodBetween March 31 st August 2020, consecutive admitted for labor in a single hospital were screened SARS-CoV-2 with nasopharyngeal RT-PCR swab tests detec...