alexa LSDV100 And LSDV101 Lumpy Skin Disease Virus-specific PCR And Real-time PCR For Rapid Diagnosis And Vaccine Quality Control
ISSN: 2161-0517

Virology & Mycology
Open Access

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9th International Virology Congress and Expo
March 13-14, 2017 London, UK

Ausama A Yousif
Cairo University, Egypt
ScientificTracks Abstracts: Virol Mycol
DOI: 10.4172/2161-0517.C1.017
Capripoxviruses are genetically and antigenically similar. Sheeppox virus (SPPV) and goatpox virus (GPV) cause diseases in ovines and caprines, respectively. Lumpy skin disease virus (LSDV) causes lumpy skin disease (LSD) in cattle. LSD is endemic in Africa and the Middle East, and was recentrly introduced into Europe and Russia . Live attenuated SPPV is used as a vaccine in endemic areas. Cattle vaccinated using SPPV can develop LSD due to induction of partial protection, or as a result of vaccine seed contamination with non-highly-attenuated LSDV. LSD control and vaccine production can be enhanced by differentiation between LSDV and SPPV using a highly specific, simple, rapid, and inexpensive PCR assay. In this study, primers were designed to specifically amplify conserved LSDV sequences spanning parts of LSDV100, and LSDV101 genes. The design allowed the amplification of a 503 bp PCR product that was used for diagnosis. An alternative reverse primer allowed the amplification of a LSDV-specific 1583 bp PCR product for sequencing. The diagnostic assay detection limit was 585 genome-copy-equivalents of LSDV/5 ul of extract. A real-time assay was 10 times more sensitive. LSDV DNA was detected in skin samples collected from 1988 to 2015. Amplification of LSDV sequences was not affected by lesion size and distribution (localized or generalized) on infected animals. Application of the developed assay for the quality control of local LSD vaccines resulted in the detection of LSDV contamination of a local SPPV vaccine. The incorporation of the developed assay in LSD control programs was recommended.

Ausama A Yousif graduated at the Faculty of Veterinary Medicine, Cairo University. He was awarded his PhD in 2002 at South Dakota State University. He published several papers on developing diagnostic reagents and vaccines for the control of emerging transboundary pathogens like lumpy skin disease virus. He was first to isolate a pestivirus from camels. Professor Yousif also worked with the industry on several aspects of the production and quality control of several vaccines, including Rift Valley fever virus, foot and mouth disease virus, and camelpox virus vaccines. His current research focus is on improving vaccines and vaccine-based control programs.


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