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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

Questions about racial integration in residences answered
2007-07-31

Answers to frequently asked questions about the racial integration of student residences at the UFS

1. Why does the UFS want to change the current situation in the student residences?

There are many reasons why a new approach to placement in the student residences is necessary. However, the main reason is of an educational nature. As a university, the UFS should create an environment in its residences where students can learn to appreciate and respect the rich diversity that is on offer at the university. A university accommodates students from many different backgrounds in terms of race, language, religion, economic status, culture and other aspects. If a student can learn to appreciate the value in this rich diversity at university, he or she will also be able to appreciate the value of this diversity in the workplace and broader society.

The current situation of predominantly white and predominantly black residences has not been able to cultivate such an appreciation for diversity and respect for one another as human beings, and will not equip students with the knowledge and skills required to manage diversity.

Besides this, there are many other areas of life in the residences that need attention. For one, we need to urgently establish a human rights culture in the residences so that the rights of all students can be respected. We need to address the abuse of alcohol, provide disabled students with their rightful place, and last but not least, really entrench a culture of learning in student residences.

Let us make the residences places we can be proud of – places of learning, of diversity, of respect; places of growth and development. This is the ideal we should all strive to achieve.  

2. Why does the management want to force us to integrate?

It is a false argument to debate the issue in terms of “force”. Any decision by a University, or any other organisation, regarding matters of policy, rules and regulations implies a restriction on the choice of an individual and an obligation to comply.  What we should focus on is whether this decision of the Council is in the best interests of our students.

The management of the university believes that it has a responsibility to give students the best education possible, not only in terms of what you learn in the lecture rooms, but especially in the residences as well. The residences can be very powerful places of learning about matters of great importance, both academic and non-academic.

The parallel-medium language policy separates students into largely white/Afrikaans and black/English classes. Efforts are being made to bridge this divide in the classroom, but we can also try to eliminate it in the residences.

The university is committed to building a new culture for the entire institution that is based on values and principles – such as an academic culture, non-racialism, respect for human rights and diversity – among staff and students.

In the context of student residences, the application of these values and principles still allows substantial room for the voluntary exercising of choice by individuals as well as by Residence Committees, notably with regard to the placement of students (they can still place 50 percent of first-year students), as well as the determination of the future character and traditions of a diverse residence.

Furthermore, students can still choose their residences (subject to availability of places), can choose a roommate, and so forth.

3. What about freedom of association?

The rights we enjoy in a democracy must be balanced against other rights, as well as the laws of the country. This means that the right to freedom of association must be balanced against laws that make it illegal to discriminate against other people on the basis of race, language or religion, for instance.

Freedom of association pertains to the right of individuals to form voluntary organisations such as clubs or private boarding houses, or their right to join or not join existing organisations.  You exercise that right when you decide to become a student of the UFS, and again when you choose to live in one of its residences.

However, once you have decided to join an organisation voluntarily, you cannot subsequently demand that that organisation should provide a “club” or residence to your liking where, for instance, you only associate with your choice of co-members. You must accept the policies of that organisation.

In any case, how would that right of yours be balanced against the right of another individual who wishes to associate with a different set of co-members? (For instance – what about the freedom of a student to associate with students NOT from his own background, but indeed from another language, cultural, racial or economic background?) 

The constitutional right to freedom of association can, in any case, not be used to exclude or discriminate on the basis of race or religion (Section 18 of the Bill of Rights).

Besides, the new policy guidelines will still make provision for freedom of association. This right can be exercised freely within a diverse residence with regard to friendships, joint academic work, socialising, sport, etc.

4. Will residences not lose their traditions?

The University appreciates that there are many valuable elements of tradition in residences. However, we must bear in mind that the traditions and character of student residences have evolved and changed over time, and they will continue to evolve and to change. In addition, we do not need to accept all aspects of residence life purely on the basis of tradition, including the unacceptably high level of alcohol abuse and unsavoury, humiliating and discriminatory orientation practices. The new approach to integrated residences provides the opportunity to retain the positive aspects of the current traditions and character, but also to develop new traditions and give residences a new character.

We can now establish a tradition and a character for each residence that are reconcilable with the values of the University as a place of scholarship and are aligned with the human rights approach of our country’s Constitution, the laws of our country and the strengths and diversity of the students in a particular residence.

5. Have students been involved in this process? Is there a role for them to play after the decision has been taken by the Council of the UFS?

In the first semester of 2007, during two rounds of consultations, the primes, SRC and student organisations were consulted about the proposed new placement policy to increase diversity in residences. Some residences also made written submissions on the matter (such as Madelief, Soetdoring, Wag-'n-bietjie, Vergeet-my-nie, Emily Hobhouse). Other residences requested and were granted more time, but did not make any submissions in the end (such as Reitz and Armentum).

Management also had several meetings with the above-mentioned structures to hear first-hand from students their concerns and solutions regarding possible challenges presented by integration in residences.

During these interactions, several excellent ideas and proposals were put forward by students. These views had a definite impact on the eventual proposal that was taken to the University Council, in particular regarding the minimum level of diversity (30%) in junior residences and the fact that residences still want to have a say in the placement of students, rather than the placement decision being left in the hands of Management alone (hence the 50% placement portion of residences). Management values the effort that was put into the process by the primes and residence committees, and thanks them for their contributions.

However, it should be stressed that consultation should not be understood as a process of negotiation, nor does it imply that consensus must be reached. What it means is that Management must take a considered decision after hearing the views of stakeholders.

Management would like students to continue to provide input and ideas regarding the implementation details of the policy guidelines. Task teams have been established and students will be informed about how they can interact with the task teams on an ongoing basis.

6. But integration in the residences was tried in the past (in the late 1990s), and then it failed. Why will it work now?

Yes, the University of the Free State did integrate its residences as far back as 1993, and for a few years it worked. The UFS did it at that time and is now doing so again, because it is the right thing to do. Yet it is important to understand why the previous attempt at racial integration in residences was not successful.

Firstly, both black and white students were much polarised because of the apartheid past. Secondly, there was insufficient management support for students in the residences, the student leaders generally as well as residence heads, in terms of dealing with diversity and related issues. Thirdly, the institutional culture of the UFS and the residences in particular was not addressed as part of broader transformation and integration in residences, whereas it is now being addressed.

In addition, the current decision to integrate residences has the benefit of being implemented after several more years of integration in schooling, sport, workplaces and other aspects of life.

This decision is also based on Management’s commitment to give all the possible support it can to this process.

This is a very important initiative that the UFS is undertaking. Management, in co-operation with students, must ensure that it succeeds. Integrated residences that produce high-quality graduates equipped to deal with the challenges of the workplace and our society is a worthwhile ideal we should all strive to achieve.

If you would like to make a proposal regarding the implementation and practical aspects of the new policy, please send it to the following email address: rector@ufs.ac.za

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