Designing novel and simple competitive internal amplification control for reliable PCR diagnosis of herpes simplex virus

Jundishapur Journal of Microbiology
Asiye AkbarianMaryam Ghahri

Abstract

PCR is a molecular technique for herpes simplex virus (HSV) detection that can cause life-threatening infections such as encephalitis and keratitis. However, the main issues, false-negative results causing by PCR inhibitors, of this technique that reduce PCR efficiency. To overcome this problem, a competitive internal amplification control (IAC) was constructed for conventional PCR using the PCR-cloning technique. The purpose of this study is the design of competitive IAC for PCR diagnosis of HSV, which in fact is the main cause of keratitis and viral encephalitis in developed countries. Composite primers for PCR amplification of Leishmania major kDNA (kinetoplast DNA) were designed and optimized to use as IAC-HSV. IAC-HSV amplified in a non-stringent condition, ligated into pTZ57R plasmid vector, and transformed into Escherichia coli JM207 and then cloned. Resulting IAC was used for 105 CSF and 78 keratitis specimens. PCR amplicons for HSV and IAC-HSV were 454-bp and 662-bp, respectively. Detection limit of IAC was determined as 1000 plasmids per PCR reaction. IAC sensitivity for HSV detection was determined as 1000 plasmids per PCR reaction. IAC sensitivity for HSV detection was 500 copies/mL of HSV DNA. Among all specimens, ...Continue Reading

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Datasets Mentioned

BETA
AB231460.1
SM1108

Methods Mentioned

BETA
PCR
nucleic acid amplification

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