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  • Title: Detection and identification of orthopoxviruses using a generic nested PCR followed by sequencing.
    Author: Sánchez-Seco MP, Hernández L, Eiros JM, Negredo A, Fedele G, Tenorio A.
    Journal: Br J Biomed Sci; 2006; 63(2):79-85. PubMed ID: 16872000.
    Abstract:
    Some orthopoxviruses are considered to be potential biological weapons. After the smallpox eradication campaign ended, routine vaccination was stopped around the world. Consequently, a significant portion of the population is now completely unprotected from infection by variola virus and related orthopoxviruses. Some of the symptoms associated with non-variola infections can be similar to smallpox, causing alert and panic situations. These infections should be considered as real public health concerns, so suitable tools for their differential diagnosis are needed. This study aims to devise a simple and easy-to-perform method that is able to detect and identify any orthopoxvirus that might cause infection in humans. In addition, the similarity of the different genes in the genomes of several species of orthopoxviruses is investigated, and orthopoxvirus-universal primer pairs in the tumour necrosis factor receptor II homologue gene are designed, taking full account of nucleotide similarity. A strategy is devised for their sensitive, rapid and cost-effective detection and identification, based on a nested PCR followed by sequencing. The efficacy of the method is tested with samples sent by the European Network of Imported Viral Diseases as part of two external quality control assays. All human orthopoxviruses assayed were detected and identified.
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