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01 June 2023 | Story Nicole Bongo | Photo Supplied
Student centered community engagement programmes
University of the Free State students participating in one of the many projects coordinated by the Engaged Scholarship Office.

To help make a change and push for sustainable development, the University of the Free State Division of Student Affairs works with communities around Bloemfontein fostering a culture of creating sustainable solutions.

Gernus Terblanche, Kovsie Support Services and Assistant Researcher in the Division says, ‘it is important for the university to be actively involved in the community as it makes up such a large portion of the Bloemfontein and students also represent many different communities on and off- campus.’

Terblanche said: “As an educational institution it is vital for the UFS to support and guide students towards creating innovative solutions; both local and globally. Our experience is that students often come up with real solutions that can make a real impact in the lives of real people – and it would be crucial to support such initiatives.” 

The office has worked with BloemShelter, VermiVillage, GAP Equip, National Hospital and as part of the programmes of 2022 also with Lighuis, Talita Cumi, ROC Kids and the Universitas Neighborhood association. “We are also very fortunate to have, Shanen Emam, Miss Free State 2023 as one of our students that are involved with our programmes,” added Terblanche.

One of the students involved is Prince Sijane, Bloemfontein Campus Student Representative Council member responsible for Civic and Social Responsibility when asked why student participation is important, he said, “By actively participating in initiatives that address social issues or promote community well-being, students become more aware of the challenges faced by society.”

The Division of Student Affairs’ KovsieACT office is also in partnership with the Faculty of Natural and Agricultural Sciences (Department of Sustainable Food Systems and Development) and the Faculty of Health Sciences (Department of Nutrition and Dietetics) to develop and maintain vegetable gardens.

Tereblanche said: “The produce of these gardens addresses hunger and malnutrition amongst students on campus. KovsieACT also facilitates an eco-vehicle project during which student teams learn how to build electric vehicles powered by solar charging stations. This project is aimed at developing skills appropriate to the 4th Industrial Revolution and sustainable resources development including clean and green energy.”  

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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