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06 February 2025 | Story André Damons | Photo Supplied
Dr Jared McDonald
Prof Jared McDonald, Assistant Dean: Faculty of The Humanities at the University of the Free State, obtained his first National Research Foundation rating in the C2 category.

Obtaining his first National Research Foundation (NRF) rating has been the goal of Prof Jared McDonald, Assistant Dean: Faculty of The Humanities at the University of the Free State (UFS), since 2020 when he was selected for the UFS Transforming the Professoriate Mentoring Programme.

Prof McDonald obtained a C2 rating recently and credits the programme, under the leadership of Dr Henriëtte van den Berg, who provided invaluable support and mentorship, for this achievement. This rating recognises Prof McDonald as an established researcher and he may enjoy some international recognition for the quality and impact of his recent research outputs. 

“I am delighted to have received a C2 rating. I was hoping to obtain a C2, so when I received confirmation, it felt really good. Since being recruited to the Transforming the Professoriate Programme I have been focused on producing a series of quality journal articles, and importantly, my first monograph. At times it was a struggle to balance the demands of being Assistant Dean in the Faculty of Humanities along with my teaching responsibilities,” says Prof McDonald.

He says obtaining the rating would not have been possible without the interventions of the programme, which assisted him in securing funding for a sabbatical. The encouragement of colleagues and family was equally valuable in helping him to keep his eye on the goal.


Research 

As a nineteenth-century historian, Prof McDonald’s, who is an Associate Professor in the Department of History, research includes topics ranging from the London Missionary Society’s missions to the San as well as the role of controversial missionaries in influencing public discourse on the right to legal equality and social inclusion for indigenous subjects of the British Crown. Another topic is the ways in which evangelical-humanitarian discourse inadvertently provided the justification for the transfer of San children to Cape colonial society. 

“In my publications, the key actors, including Khoesan, are revealed to have been exercising agency in response to a social and political context that was not of their own choosing, but to which they had to respond. The contradictions of the period, coupled with the prospects for blurring the social boundaries of an otherwise strict hierarchical society, provided the means for social manoeuvre and options for resistance from within the confines of the colonial state. I am continuing to explore these ideas in a series of upcoming journal articles and book chapters,” he says. 

The pressure, says Prof McDonald, is already on to retain his rating, and hopefully improve it, when it comes up for review in five years’ time. He is currently working on his second monograph, which is a historical biography of a controversial, but fascinating, missionary who played a notable role in South African history in the early nineteenth century. “The worth of any historical biography lies in the biographer’s ability to shed light on the circumstances, contingencies, and contradictions that shaped the contours of the protagonist’s life, thus illuminating the historical context,” concludes Prof McDonald. 

He seeks to relate his research to his approach to teaching by exploring innovative ways of making the past relevant to students today. This is motivated by the conviction that the elucidation of possibilities of agency in the past raises the prospect for students to engage with the meanings and possibilities of agency in the present.

News Archive

Research eradicates bacteria from avocado facility
2017-01-17

 Description: Listeria monocytogenes Tags: Listeria monocytogenes

Listeria monocytogenes as seen under an electron
microscope. The photo was taken with a transmission
electron microscope at the microscopy unit of the UFS.
Bacteriophages (lollipop-like structures) can be seen
next to the bacterial cells.
Photo: Supplied

“The aim of my project was to identify and characterise the contamination problem in an avocado-processing facility and then to find a solution,” said Dr Amy Strydom, postdoctoral fellow in the Department of Microbial Biochemical and Food Biotechnology at the University of the Free State (UFS).

Her PhD, “Control of Listeria monocytogenes in an Avocado-processing Facility”, aimed to identify and characterise the contamination problem in a facility where avocados were processed into guacamole. Dr Strydom completed her MSc in food science in 2009 at Stellenbosch University and this was the catalyst for her starting her PhD in microbiology in 2012 at the UFS. The research was conducted over a period of four years and she graduated in 2016. The research project was funded by the National Research Foundation.

The opportunity to work closely with the food industry further motivated Dr Strydom to conduct her research. The research has made a significant contribution to a food producer (avocado facility) that will sell products that are not contaminated with any pathogens. The public will then buy food that is safe for human consumption.


What is Listeria monocytogenes?

Listeria monocytogenes is a food-borne pathogenic bacterium. When a food product is contaminated with L. monocytogenes, it will not be altered in ways that are obvious to the consumer, such as taste and smell. When ingested, however, it can cause a wide range of illnesses in people with impaired immune systems. “Risk groups include newborn babies, the elderly, and people suffering from diseases that weaken their immune systems,” Dr Strydom said. The processing adjustments based on her findings resulted in decreased numbers of Listeria in the facility.

The bacteria can also survive and grow at refrigeration temperatures, making them dangerous food pathogens, organisms which can cause illnesses [in humans]. Dr Strydom worked closely with the facility and developed an in-house monitoring system by means of which the facility could test their products and the processing environment. She also evaluated bacteriophages as a biological control agent in the processing facility. Bacteriophages are viruses that can only infect specific strains of bacteria. Despite bacteriophage products specifically intended for the use of controlling L. monocytogenes being commercially available in the food industry, Dr Strydom found that only 26% of the L. monocytogenes population in the facility was destroyed by the ListexP100TM product. “I concluded that the genetic diversity of the bacteria in the facility was too high and that the bacteriophages could not be used as a control measure. However, there is much we do not understand about bacteriophages, and with a few adjustments, we might be able to use them in the food industry.”

Microbiological and molecular characterisation of L. monocytogenes

The bacteria were isolated and purified using basic microbiological culturing. Characterisation was done based on specific genes present in the bacterial genome. “I amplified these genes with polymerase chain reaction (PCR), using various primers targeting these specific genes,” Dr Strydom said. Some amplification results were analysed with a subsequent restriction digestion where the genes were cut in specific areas with enzymes to create fragments. The lengths of these fragments can be used to differentiate between strains. “I also compared the whole genomes of some of the bacterial strains.” The bacteriophages were then isolated from waste water samples at the facility using the isolated bacterial strains. “However, I was not able to isolate a bacteriophage that could infect the bacteria in the facility.

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