Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
14 August 2024 | Story Martinette Brits | Photo Supplied
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

Almost 2000 degrees and diplomas conferred at Winter Graduation
2015-06-26

Live streaming will be available on: http://livestream.ufs.ac.za/

The 2015 Winter Graduations are almost underway. The highlight on the university calendar for every graduate will take place on the Bloemfontein Campus on 1-2 July 2015. On 1 July 2015, diplomas will be awarded by the Centre of Financial Planning Law (331 in total) and the School of Open Learning (376 in total). On 2 July 2015, a total of 1 220 master’s and doctoral degrees will be awarded to graduates from all seven faculties.

A highlight at this year’s Winter Graduation is the awarding of three honorary degrees by the university. Ambassador Lakhdar Brahimi, Dr Mercy Oduyoye and Mr John Samuel will receive honorary degrees.

On 17 August 2012, Ambassador Brahimi was appointed by the United Nations as the new peace envoy to Syria, replacing Kofi Annan. He is also a member of the Commission on Legal Empowerment of the Poor, the first global initiative to focus specifically on the link between exclusion, poverty and the law. Prof Heidi Hudson, Head of the Centre for Africa Studies at the UFS, will receive the honorary degree on his behalf.

Dr Oduyoye is widely regarded as one of the most influential women theologians Africa has produced in recent history. Currently, she directs the Institute of African Women in Religion and Culture at the Trinity Theology Seminary in Legon, Ghana.

Mr John Samuel, who will receive an honorary award, is also scheduled to be a guest speaker at the two ceremonies on 1 July 2015.

Wednesday 1 July 2015:

John Samuel will be the speaker at both ceremonies. He is one of South Africa’s leading education experts with international and national experience, covering a period of more than forty years. He was involved in the founding of the South African Campaign: Public Participation in Education Network (PPEN), established the Centre for Education Policy Development, the Joint Working Group (for The National Party Government and the ANC), the National Education Conference, and the National Education and Training Forum. He also made leadership contributions to the First Education and Training White Paper, the Transformation Strategy for the National Education Department, and the first Green Paper on Higher Education.

John is also Senior Programme Director of the WK Kellogg Foundation in the USA. He has also been the Chief Executive of the Nelson Mandela Foundation, and the CEO of the Oprah Winfrey Leadership Academy for Girls.

Thursday 2 July 2015:

Nataniël will be the speaker at both ceremonies. Nataniël is a singer, songwriter, and South African entertainer, who has crossed from the alternative circuit to the stage. For the past 10 years, he has become well-known for his outspoken Kaalkop column in SARIE magazine. His solo career was launched in 1987 and, since then, he has released 16 albums, staged more than 70 original theatre productions, and published 15 books. Over the past two decades, Nataniël has gained the title of South Africa’s leading exponent of the solo stage act. He manages Kaalkop Studio, his lifestyle retail company, and records on his own independent label, Nataniël House Of Music. He is an ambassador for Child Welfare SA, and also heads his own charitable foundation, The Nataniël Progress Project.

 

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept