An assay based on reverse transcription coupled with the polymerase chain reaction (RT-PCR) was used for the detection of hog cholera virus (HCV) and bovine virus diarrhoea virus (BVDV) in cell culture. In this study, a precipitate of the supernatants derived from cell cultures infected with HCV and BVDV was used in RT reactions, in place of extracted viral RNA. Both RT and PCR were performed u...

Background and Aims: Viroids are smallest known plant pathogens and cause several economically significant diseases. Until recently, viroid detection relied mainly on biological tests and indexing. Today various diagnostic techniques such as nucleic acid hybridization, southern blot and reverse transcription coupled with polymerase chain reaction (RT-PCR) are being used for detection and diag...

The use of reverse transcriptase coupled with the polymerase chain reaction (RT-PCR) has been proven to be a valuable tool in the synthesis and isolation of cDNA clones as well as the quantification of rare messenger RNA species. While a number of different approaches can be used to permit gene-specific cDNA synthesis and amplification, a recurring problem is one of high background signal (i.e....

We report a microfluidic platform for rapid screening and selection of monoclonal antibodies (mAbs) secreted by single cells. The microfluidic platform integrates single-cell handling and compartmentalization, fluorescence detection of antibodies secreted by cells, and cell recovery for reverse transcription polymerase chain reaction (RT-PCR) of antibody genes.

Detection of African horsesickness virus (AHSV) by three different reverse transcription polymerase chain reaction (RT-PCR) based methods were compared. Primers were complementary to sequences contained in the gene encoding non-structural protein 2 of AHSV serotype 3. All three assays were group-specific for AHSV and detected all nine serotypes but not related orbiviruses. A dilution range was ...

A rapid and sensitive reverse transcription polymerase chain reaction (RT-PCR) and nested-PCR were used to detect bovine viral diarrhea virus 1 (BVDV-1) in bull semen. Selected primers could amplify a part of the 5´UTR of the BVDV genome. A 294 bp DNA fragment was amplified and specificity of the results was confirmed by direct sequencing of the PCR product. Prior to RNA extraction, the seminal...

in this study, the possible infection of thomson navel, moro blood sweet orange, page mandarin and webber pomelo with citrus viroids was investigated. biological indexing was performed by grafting on etrog citron (c. medica) and maintained in temperature-controlled greenhouse. after inoculation, rna was extracted by sds– potassium acetate method. detection of citrus viroids was done reverse tra...

Abstract Background Coronavirus disease (COVID-19) presents in children usually with less severe manifestations than adults. Although fever and cough were reported as the most common symptoms, can have non-specific symptoms. We describe an infant aplastic anemia main manifestation. Case presentation a case of SARS-CoV-2 infection without any respiratory symptoms or signs while manifesting princ...

The diagnosis of porcine epidemic diarrhea virus (PEDV) infection in the laboratory is rather fastidious because of difficulties in virus propagation. The feasibility of virus propagation in vivo is also limited by the handling of a number of samples at the same time. In this study, the detection of PEDV by reverse transcription polymerase chain reaction (RT-PCR) is described. The RT-PCR could ...

Helicobacter pylori (H. pylori) establishes long-term infections associated with severe gastric diseases such as peptic ulceration and cancer. Exposure to an antibacterial agent can help regulate the expression levels of its pathogenic genes. In this study, we analyzed transcriptional changes in H. genes induced by β-caryophyllene. We used next-generation sequencing (NGS) analyze RNA changes, r...