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Economic impacts of tick-borne diseases in Africa : tick-borne diseases Full text
2009
B.D. Perry
Economic impacts of tick-borne diseases in Africa : tick-borne diseases Full text
2009
B.D. Perry
As we join Onderstepoort in celebrating its centenary, it is worth reflecting that tick-borne infections of wildlife and livestock have been part of everyday life in Africa for many, many generations. While much has changed since Watkins-Pitchford started developing short-interval dipping trials with arsenicals to contain the new epidemic of East Coast fever in southern Africa 100 years ago, when it comes to the impacts of tick-borne infections, many of the same challenges remain.
Show more [+] Less [-]Economic impacts of tick-borne diseases in Africa : tick-borne diseases Full text
2009
Perry, B.D.
As we join Onderstepoort in celebrating its centenary, it is worth reflecting that tick-borne infections of wildlife and livestock have been part of everyday life in Africa for many, many generations. While much has changed since Watkins-Pitchford started developing short-interval dipping trials with arsenicals to contain the new epidemic of East Coast fever in southern Africa 100 years ago, when it comes to the impacts of tick-borne infections, many of the same challenges remain.
Show more [+] Less [-]Theiler and the 'Spirit of Onderstepoort' Introductory keynote address : historical overview : Onderstepoort and veterinary research in Africa Full text
2009
R.D. Bigalke
Theiler and the 'Spirit of Onderstepoort' Introductory keynote address : historical overview : Onderstepoort and veterinary research in Africa Full text
2009
R.D. Bigalke
Although Theiler became internationally known for his pioneering veterinary research a distant century ago, there are probably few veterinary researchers today who have not heard of him. Onderstepoort, the research institute he created, is equally well, if not even better, known. Moreover, the name Onderstepoort is not only associated with his institute but also with the only South African faculty of veterinary science, another Theiler 'baby'. The purpose of this presentation is to determine why this was so, and to what extent the fame was justified. Was it due to the 'Spirit of Onderstepoort' sometimes referred to by Theiler in the early as well as later stages of his career, or was there perhaps more to it, and what was Theiler's share in the development of that spirit, that fame
Show more [+] Less [-]Theiler and the 'Spirit of Onderstepoort' Introductory keynote address : historical overview : Onderstepoort and veterinary research in Africa Full text
2009
Bigalke, R.D.
Although Theiler became internationally known for his pioneering veterinary research a distant century ago, there are probably few veterinary researchers today who have not heard of him. Onderstepoort, the research institute he created, is equally well, if not even better, known. Moreover, the name Onderstepoort is not only associated with his institute but also with the only South African faculty of veterinary science, another Theiler 'baby'. The purpose of this presentation is to determine why this was so, and to what extent the fame was justified. Was it due to the 'Spirit of Onderstepoort' sometimes referred to by Theiler in the early as well as later stages of his career, or was there perhaps more to it, and what was Theiler's share in the development of that spirit, that fame
Show more [+] Less [-]Prospects for controlling trypanosomosis Full text
2009
Vale, G.A.(University of Stellenbosch)
The best technical package for the future comprises trypanocidal drugs for temporary relief and the use of insecticide-treated cattle, artificial baits and aerial spraying to attack the vector, to so give more lasting security. Whether this can speed the previously slow progress will depend on overcoming past hindrances to tsetse control: sporadic support, disputes over its desirability, difficulties of sustaining international operations, and poor planning in some instances. The Pan-African Tsetse and Trypanosomiasis Campaign intends to speed the progress but will fail unless it improves its image by breaking its association with the sterile insect technique and quickly executing some cheap and effective operations in large areas. Even then, there could be severe brakes due to Africa's political and financial instability. Overall, the pace of control is likely to increase, but perhaps only a little.
Show more [+] Less [-]Economic impacts of tick-borne diseases in Africa Full text
2009
Perry, B.D.(ILRI)
Canine babesiosis Full text
2009
Schoeman, J.P.(University of Pretoria Faculty of Veterinary Science Department of Companion Animal Clinical Studies)
Babesiosis is a tick-borne disease affecting humans and many domestic and wild animals. Domestic animals showing appreciable morbidity and mortality include dogs, cats, cattle and horses. Both canine and feline babesiosis are diseases characterised by haemolytic anaemia, icterus and haemoglobinuria. Canine babesiosis can range from chronic or subclinical to peracute and fatal, depending on the virulence of the species and the susceptibility of the host. This paper deals with canine babesiosis with specific reference to pathogenesis, clinical findings, complications, diagnosis and treatment, as well as newly identified prognostic factors in Babesia rossi babesiosis.
Show more [+] Less [-]African swine fever Full text
2009
Penrith, Mary-Louise(University of Pretoria Faculty of Veterinary Science Department of Veterinary Tropical Diseases)
African swine fever (ASF) is a devastating haemorrhagic fever of pigs that causes up to 100 % mortality, for which there is no vaccine. It is caused by a unique DNA virus that is maintained in an ancient cycle between warthogs and argasid ticks, making it the only known DNA arbovirus. ASF has a high potential for transboundary spread, and has twice been transported from Africa to other continents- Europe and subsequently the Caribbean and Brazil (1957, 1959) and the Caucasus (2007). It is also a devastating constraint for pig production in Africa. Research at Onderstepoort Veterinary Institute has made and is making important contributions to knowledge of this disease, focusing on the cycle in warthogs and tampans and transmission from that cycle to domestic pigs, resistance to its effects in domestic pigs, and the molecular genetic characterisation and epidemiology of the virus.
Show more [+] Less [-]Veterinary education in Africa: Current and future perspectives Full text
2009
Swan, G.E.(University of Pretoria Faculty of Veterinary Science) | Kriek, N.P.J.(University of Pretoria Faculty of Veterinary Science)
Veterinary education commenced in South Africa in 1920 at the Onderstepoort Veterinary Institute in South Africa in association with the Transvaal University College, now the University of Pretoria. Sir Arnold Theiler, Director of Veterinary Research and Education, was the first Dean. Today there are 46 veterinary training institutions in Africa of which 21 are in sub-Saharan Africa. Veterinary services are indispensable to the sustained health and wellbeing of animals and humans, and agricultural economies of countries worldwide. Veterinary education, postgraduate training, and research, and adequate numbers of veterinarians, are essential to satisfy the millennium development goals, the objectives of NEPAD and the African Union, and the agreements regulating international trade. The relevance of the veterinary profession internationally is currently subject to profound scrutiny. Its contributions are assessed against major environmental, demographic, political, disease, technological and economic needs. The scope of veterinary training in future will have to emphasise veterinary public health, food safety, emerging diseases, international trade, bioterrorism, and biomedical research, within the context of a one-health system focusing on the interface between wildlife, domesticated animals, humans, and their environment. Within the context of time available, it would mean reducing the time allocated to training in the field of companion animals. A brief history and scope of veterinary education; current international trends in veterinary education and provisioning; and some perspectives on future veterinary training and initiatives applicable to Africa are provided.
Show more [+] Less [-]Field services: Eradication and control of animal diseases Full text
2009
Modisane, B.M.(Disaster Management and Veterinary Services National Department of Agriculture)
Prevention, eradication and control of animal diseases, as well as public health assurance are major functions of veterinary authorities. The strategies to control animal diseases differ from disease to disease but are often similar on a disease basis from country to country depending on the main objective of the measure employed. These measures include among others movement control and quarantine, vaccination, treatment and mass slaughtering. However, not every country uses all these control measures at the same time. A combination of measures may be employed to avoid spreading of the disease from infected to clean animals and success is dependent on a variety of factors, including the strength and capacity of the veterinary services, cross border efforts for disease surveillance, political will, diagnostic facilities and financial support.
Show more [+] Less [-]Molecular monitoring of African swine fever virus using surveys targeted at adult Ornithodoros ticks: A re-evaluation of Mkuze Game Reserve, South Africa Full text
2009
Arnqt, L.F.(University of Pretoria Department of Zoology and Entomology Mammal Research Institute,University of Pretoria Faculty of Veterinary Science Department of Paraclinical Sciences) | Du Toit, J.T.(University of Pretoria Department of Zoology and Entomology Mammal Research Institute,Utah State University Department of Wildland Resources) | Bastos, A.D.S.(University of Pretoria Department of Zoology and Entomology Mammal Research Institute,ARC-Onderstepoort Veterinary Institute)
The Mkuze Game Reserve (MGR), in north-eastern KwaZulu-Natal Province, South Africa is an African swine fever virus (ASF) controlled area. In a survey conducted in 1978, ASF prevalence in warthogs and Ornithodoros ticks in MGR was determined to be 2 % and 0.06 %, respectively. These values, acknowledged as being unusually low compared to other East and southern African ASF-positive sylvatic-cycle host populations, have not been assessed since. The availability of a sensitive PCR-based virus detection method, developed specifically for the sylvatic tampan host, prompted a re-evaluation of ASF virus (ASFV) prevalence in MGR ticks. Of the 98 warthog burrows inspected for Ornithodoros presence, 59 (60.2 %>) were found to contain tampans and tick sampling was significantly male-biased. Whilst gender sampling-bias is not unusual, the 27 °% increase in infestation rate of warthog burrows since the 1978 survey is noteworthy as it anticipates a concomitant increase in ASFV prevalence, particularly in light of the high proportion (75 %>) of adult ticks sampled. However, despite DNA integrity being confirmed by internal control amplification of the host 16S gene, PCR screening failed to detect ASFV. These results suggest that ASFV has either disappeared from MGR or if present, is localized, occurring at exceptionally low levels. Further extensive surveys are required to establish the ASFV status of sylvatic hosts in this controlled area.
Show more [+] Less [-]Trends in the control of theileriosis in sub-Saharan Africa Full text
2009
Mckeever, D.(Royal Veterinary College Department of Pathology and Infectious diseases)