J
John Duncan Grewar
Researcher at University of Pretoria
Publications - 33
Citations - 385
John Duncan Grewar is an academic researcher from University of Pretoria. The author has contributed to research in topics: Outbreak & African horse sickness. The author has an hindex of 10, co-authored 28 publications receiving 285 citations. Previous affiliations of John Duncan Grewar include University of the Witwatersrand & University of the Western Cape.
Papers
More filters
Journal ArticleDOI
The 2011 outbreak of African horse sickness in the African horse sickness controlled area in South Africa
John Duncan Grewar,Camilla Theresa Weyer,Alan John Guthrie,Pieter Koen,Sewellyn C. Davey,Melvyn Quan,Dawid Visser,Esthea Russouw,Gary Bührmann +8 more
TL;DR: A detailed description of the outbreak provides a sound scientific basis to assist decision making in future AHS outbreaks in the AHS controlled area of South Africa and in countries where AHS is an exotic or emerging disease.
Journal ArticleDOI
Development of three triplex real-time reverse transcription PCR assays for the qualitative molecular typing of the nine serotypes of African horse sickness virus.
Camilla Theresa Weyer,Christopher Joone,Carina W. Lourens,Mpho S. Monyai,Otto Koekemoer,John Duncan Grewar,Antoinette van Schalkwyk,Phelix O.A. Majiwa,N. James MacLachlan,N. James MacLachlan,Alan John Guthrie +10 more
TL;DR: Results of the current study confirm that the A HSV TS RT-qPCR assays for the identification of individual AHSV serotypes are applicable and practicable and therefore are potentially highly useful and appropriate for virus typing in AHS outbreak situations in endemic or sporadic incursion areas.
Journal ArticleDOI
Tracking Socioeconomic Vulnerability Using Network Analysis: Insights from an Avian Influenza Outbreak in an Ostrich Production Network
TL;DR: The hypothesis that increasing economic efficiency in the domestic ostrich industry in South Africa made the system more vulnerable to outbreak of Highly Pathogenic Avian Influenza (H5N2), and the results indicated that as time progressed, the network became increasingly vulnerable to pathogen outbreaks.
Journal ArticleDOI
Novel Hendra Virus Variant Detected by Sentinel Surveillance of Horses in Australia
Edward J. Annand,Bethany A Horsburgh,Kai Xu,Peter A. Reid,Ben Poole,Maximillian C. de Kantzow,Nick Brown,Alison Tweedie,Michelle Michie,John Duncan Grewar,A. Jackson,Nagendrakumar Balasubramanian Singanallur,Karren M. Plain,Karan Kim,Mary Tachedjian,Brenda van der Heide,Sandra Crameri,David L. Williams,C.J. Secombe,Eric D Laing,Spencer L. Sterling,Lianying Yan,L. Jackson,Cheryl A Jones,Raina K. Plowright,Alison J. Peel,Andrew C. Breed,Ibrahima Mbemba Diallo,Navneet K. Dhand,Philip N Britton,Christopher C. Broder,Ina Smith,John-Sebastian Eden +32 more
TL;DR: In silico and in vitro comparisons of the receptor-binding protein with prototypic HeV support that the human monoclonal antibody m102.4 used for postexposure prophylaxis and current equine vaccine will be effective against this variant.
Journal ArticleDOI
Quantitative Risk Assessment for African Horse Sickness in Live Horses Exported from South Africa
TL;DR: A stochastic risk model was developed to estimate the probability of exporting an undetected AHS-infected horse through a vector protected pre-export quarantine facility, in accordance with OIE recommendations for trade from an infected country.