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Dr Luther van der Mescht
Dr Luther van der Mescht, Senior Lecturer in the Department of Zoology and Entomology.

Ticks that feed on South Africa’s cattle are developing resistance to the only effective pesticides, making them increasingly difficult to control. If this issue is not addressed, the spread of these parasites and their resistance to pesticides could significantly impact farmers' incomes and food security.

According to a study by Dr Luther van der Mescht, Senior Lecturer in the Department of Zoology and Entomology, many tick populations in South Africa are resistant to at least two of the three main types of acaricides (chemical classes) used in the country.

Dr Van der Mescht notes that with around 12 million cattle in South Africa, these ticks not only lower meat and milk production but also carry pathogens that can cause potentially fatal diseases. He estimates that the economic losses from tick-borne diseases and the use of acaricides could reach up to R670 million annually in the cattle industry alone.

He adds that South Africa's agricultural sector is unique due to its dual farming system, which includes both subsistence and commercial farmers, amplifying the impact of ticks. “The country is also home to a wide variety of tick species that transmit numerous pathogens across a diverse range of habitats and climates in which cattle are farmed. Consequently, the effects of ticks and tick-borne diseases in South Africa may be more severe compared to those in developed countries.”

Dr Van der Mescht highlights that ticks are developing resistance primarily due to poor farm management practices, such as underdosing, overdosing, and excessive use of acaricides. “Additionally, insufficient government support in educating farmers and managing resistance exacerbates the problem.”

Managing acaricide resistance

Dr Van der Mescht explains that while ticks will inevitably develop resistance to acaricides, this usually happens much slower if pesticides are used strategically. To slow the development of resistance, several measures can be implemented: 

• Minimise the number of acaricide treatments.
• Assess tick diversity and acaricide resistance at the farm level and monitor it regularly. The study found that acaricide resistance was highly variable across South Africa, likely due to different farm management practices; hence it should be assessed at the farm level.
• Quarantine animals when transferring them to a new farm, ensuring they are free of ticks before releasing them.
• Rotate acaricides from different chemical classes, with a gap of at least two years between applications.

• Government veterinary services should raise awareness about acaricide resistance and provide support, particularly to under-resourced farmers. Establishing acaricide resistance testing laboratories would help monitor resistance and offer guidance to farmers.

Expert in parasitology

Dr Van der Mescht is particularly fascinated by the fact that most animals on earth follow a parasitic way of life. He graduated with a PhD in Conservation Ecology from the Department of Conservation Ecology and Entomology at Stellenbosch University in 2015, focusing on rodent parasites.

Career highlights include receiving the Wilhelm Neitz Memorial Scholarship in Parasitology from the Parasitological Society of Southern Africa (PARSA) for study abroad, and the Blaustein Centre for Scientific Cooperation Postdoctoral Fellowship in 2016 from Ben-Gurion University of the Negev, Israel, to conduct research on the experimental evolution of host specialisation. He also received the Claude Leon Foundation Postdoctoral Fellowship in 2019 to study the cat flea at Stellenbosch University’s Department of Botany and Zoology.

With over four years of experience in the industry at a contract research organisation, he has conducted more than 40 clinical studies for international pharmaceutical companies and published over 50 peer-reviewed scientific articles.

Making research visible, impactful, and relevant to society

Dr Van der Mescht recently published an article for The Conversation and participated in interviews with eNCA, Newzroom Afrika, and Cape Talk to discuss his research. “This effort aligns with the Vision 130 strategy of being a regionally engaged university and supports one of the key pillars of research development at the University of the Free State (UFS), which is to make our research visible, impactful, and relevant to society.”

He also highlighted the significance of popular science, noting that it helps scientists communicate their research to a broader audience, build their professional reputation, enhance their funding opportunities, and improve their research outcomes.

News Archive

Moshoeshoe Memorial Lecture to focus on Leadership challenges
2006-03-27

 Lecture to focus on Leadership challenges

 n Thursday 25 May 2006 – Africa Day – the University of the Free State (UFS) will host the inaugural King Moshoeshoe Memorial Lecture in honour of this great African leader and nation-builder.

 Prof Njabulo Ndebele, internationally renowned writer and academic, and Vice-Chancellor of the University of Cape Town (UCT), will deliver the inaugural lecture at the Main Campus in Bloemfontein on the topic: Reflections on the Leadership Challenges in South Africa.

 “I see the lecture as part of a larger debate on leadership models, particularly the concept of African leadership, as well as the ongoing discourse about nation-building and reconciliation,” says Prof Frederick Fourie, Rector and Vice-Chancellor of the UFS.

 According to Prof Fourie, the Moshoeshoe project was launched at the UFS in 2004 to coincide with South Africa’s first decade of democracy and was part of the University’s centenary celebrations, having been founded in 1904.

 “Through this project the UFS seeks to honour a great African leader and demonstrate our commitment to transformation so as to create a truly inclusive and non-racial university,” said Prof Fourie.

 “As the founder of the Basotho nation, King Moshoeshoe is widely credited for his exceptional style of leadership, displaying the characteristics of diplomacy, reconciliation and peaceful co-existence in his efforts to unite diverse groups into one nation,” said Prof Fourie.

 As part of its ongoing Moshoeshoe project, the UFS commissioned a television documentary programme on the life and legacy of King Moshoeshoe. This was completed in 2004 and broadcast on SABC 2 later that year.


Abridged curriculum vitae of Njabulo S Ndebele

Professor Njabulo S Ndebele is currently Vice-Chancellor and Principal of UCT.

 Njabulo Ndebele began his term of office at UCT in July 2000, following tenure as a scholar in residence at the Ford Foundation’s headquarters in New York.  He joined the Foundation in September 1998, immediately after a five-year term of office as Vice-Chancellor and Principal of the University of the North in Sovenga, at the then Northern Province.  Previously he served as Vice-Rector of the University of the Western Cape.  Earlier positions include Chair of the Department of African Literature at the University of the Witwatersrand; and Pro-Vice-Chancellor, Dean, and Head of the English Department at the National University of Lesotho.

 An established author, Njabulo Ndebele recently published a novel The Cry of Winnie Mandela to critical acclaim.  An earlier publication Fools and Other Stories won the Noma Award, Africa’s highest literary award for the best book published in Africa in 1984.  His highly influential essays on South African literature and culture were published in a collection Rediscovery of the Ordinary.

 Njabulo Ndebele served as President of the Congress of South African Writers for many years.  As a public figure he is known for his incisive insights in commentaries on a range of public issues in South Africa.  He holds honorary doctorates from Universities in the Netherlands, Japan, South Africa and the United States of America.  He is also a Fellow of UCT.

Njabulo Ndebele is also a key figure in South African higher education.  He has served as Chair of the South African Universities Vice-Chancellor’s Association from 2002-2005, and served on the Executive Board of the Association of African Universities since 2001.  He has done public service in South Africa in the areas of broadcasting policy, school curriculum in history, and more recently as chair of a government commission on the development and use of African languages as media of instruction in South African higher education.  He recently became President of the Association of the AAU and Chair of the Southern African Regional Universities Association (SARUA).

Media release
Issued by: Lacea Loader
Media Representative
Tel:   (051) 401-2584
Cell:  083 645 2454
E-mail:  loaderl.stg@mail.uovs.ac.za 
26 March 2006

 

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