INTRODUCTION In this protocol, sample and competitor RNAs (previously synthesized as described in Preparation of Competitor RNA for Competitive RT-PCR) are reverse transcribed (separately) in a pilot experiment. A constant amount of sample RT product is then combined with a 2-logserial dilution of competitor RT product for PCR. This procedure provides an approximate copy number for the sample, ...

The present studies demonstrate a theoretical and practical framework for the accurate quantitation of gene expression in RNA extracted from microscopic tissue samples. The approaches are developed around competitive RT-PCR techniques. Assay performance has been examined and validated at both the RT and PCR steps. Our analysis of RT transcription efficiency for a number of native and competitor...

We present a case of coronavirus disease 2019 (COVID-19) re-infection where the time interval between two COVID-positive episodes is longest in literature. A 40-year male patient was admitted to Emergency Department with  complaints sore throat, cough and diarrhea; re-diagnosed as COVID-19 positive after virus-free period. He did not have chronic his anamnesis used no medication. After infectio...

Background and Aims: Canine distemper (CD) is a deadly infectious disease of Canidae family. CD is a multi-systemic viral disease and is specified by wide range of clinical symptoms. The manifestations are not always indicative of CD, therefore a laboratory confirmation is necessary for suspected cases. Materials and Methods: Different clinical specimens of 19 CD suspected unvaccinated dogs wer...

Pseudogenes are genes with high sequence homology to functional genes that have been rendered obsolete by mutations, preventing their expression. Several genes, such as αand β-globin, have been shown to have duplicated sequences representing nonfunctional genes or pseudogenes. The presence of pseudogenes is common; not every DNA duplication produces a functional gene. Cyclophilin (CyP), an 18-k...

background: adhesion and biofilm formation are two important steps in candida pathogenesis. the aim of the current study was to investigate the presence of bcr1 gene in candida albicans (c. albicans) isolates from women with vaginal candidiasis and its impact on biofilm formation. methods: we used 50 clinical isolates which confirmed c. albicans by pcr-rflp. then total rna was extracted from c....