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06 October 2020 | Story Leonie Bolleurs | Photo Supplied
Dr Kgosi Mocwagae explored the Qwaqwa water crisis because at a young age, he could not understand why the community in which he grew up faced so many water challenges despite a high presence of water from rivers, consistent rainfall, and streams bursting from the ground.

Dr Kgosi Mocwagae, Programme Director and Lecturer: Department of Urban and Regional Planning, received his PhD qualification during the October virtual graduation ceremonies.

His study, titled Exploring the Qwaqwa water crisis for effective planning post-apartheid, focuses on the water crisis in the Qwaqwa area, which commenced on 1 January 2016 and saw people without access to clean drinking water from their taps. The community had to turn to alternative means, such as collecting water from government-contracted water tankers, rivers, emergency hydrants, and wells.

Understanding the water crisis

Dr Mocwagae says the reason why he took up this study was because at a young age, he could not understand why the community in which he grew up faced so many water challenges despite a high presence of water from rivers, consistent rainfall, and streams bursting from the ground.
 
In this study, he aimed to explore the history of water policy in South Africa, together with the water crisis in Qwaqwa. He also documented the lived experiences of the affected Qwaqwa communities to determine the effect of not having access to clean drinking water in terms of quality of water, time, money, and distance travelled, to name just a few. 

Dr Mocwagae furthermore assessed interventions by various actors during the Qwaqwa water crisis, which included accessing water from municipally contracted water tankers, streams and rivers, rainwater harvesting, donations, paying for delivery of water, boreholes, and emergency water hydrants intended for fire breakouts. He also investigated the implications of the Qwaqwa water crisis for effective planning in post-apartheid South Africa.

He states: “Despite reports from the government that the Qwaqwa water crisis was an issue from 2015 and a result of drought, the study proved differently.” 

Water crisis due to poor planning

“Firstly, the water crisis was a cumulative effect of poor water planning since the founding of Qwaqwa as a homeland in 1974. Further to this, Qwaqwa has not been able to sufficiently provide water to the community from 1974 to date.”

Dr Mocwagae continues: “A major contributing factor to the water crisis was that the three dams in the area were still performing their primary functions as established during apartheid. Planning would have to be done to reprioritise water to Qwaqwa.

He also found that the municipality had not planned and invested in the maintenance and development of water infrastructure to provide water. 

The study was also able to demonstrate that there is a form of socialisation in planning that does not prioritise the community of Qwaqwa. In this community, more than 50% of the people live in poverty. According to Dr Mocwagae’s findings, the idea exists that the community first needs to be viewed a worthy economic contributor in order for them to benefit from water that originates from Qwaqwa. 

“Alternative means of accessing water and water-use education are also needed as part of the process of resolving the Qwaqwa water crisis,” says Dr Mocwagae. 

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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