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06 May 2020 | Story Prof Thidziambi Phendla. | Photo Supplied
Prof Thidziambi Phendla.

Our lives as we know it will never be the same again because of the Covid-19 pandemic. The education system, among other sectors, will be subjected to changes in the provisioning of teaching and learning. 

School disruptions are a familiar phenomenon in both basic and post-school education in South Africa. In recent years, South Africa has seen waves of student boycotts, disruptions, and shutdowns of universities and TVET colleges. Most disruptions lasted for a few days, while some went on for several weeks. One case in particular is that of Vuwani in Limpopo, where more than 50 schools were either vandalised or burned to ashes; nevertheless, the school year was recovered, and learners progressed to the next level. The main difference between the usual disruptions and the current situation lies in the enormity of the shutdown, given that it is clouded at a national level by unpredictable decisions made by the National Committee. 

Shortening school holidays
If the June exams were to be scrapped, the chief challenge would be the lost opportunity to evaluate and assess the extent to which the students have achieved the academic objectives stipulated for the subjects in the curriculum. June examinations for the other grades may not have a serious impact on the learner’s progress to the next class, as other forms of assessment could still be used. However, for matric learners, scrapping the June exams may have a huge effect, since learners require quality assessed examination results to guarantee entrance into higher education institutions.

Shortening of school holidays may not have a huge impact on learners, as this system has been in operation for many years. Many of the best performing schools shorten the school holidays to assist learners in Grades 11 and 12. In many schools, learners continue with normal schooling during the June holidays and rest during the last week of the holiday.  This strategy is already being used by the best performing schools in their quest to support learners to achieve excellent matric results. Depending on the number of days lost during the national lockdown, the option of shortening the June holidays may be the most commendable.

At face value, the strategy to lengthen school days may be the most preferred, as a number of schools in the country are already implementing it at a deeper level. Increasing the number of teaching hours may, however, have an adverse impact on the learners, who may experience enormous mental exhaustion. If the day is lengthened, it is advisable to consider not more than five hours per week.  

Deliver modern and classroom-targeted technologies 
To complement the time recovery mentioned above, there would be a need for a series of changes in some, if not all, the fundamental elements of the effective provision of teaching and learning discussed below. First, change in pedagogical approaches is inevitable. Therefore, classroom teaching will not be the same again. Second, teachers will be compelled to adapt to the use of assessment data in their endeavours to drive teaching and learning. Third, teaching in the 4IR will no longer be negotiable, but will demand advanced skills to deliver modern and classroom-targeted technologies.

Fourth, it will be crucial for teachers to acquire innovative skills to manage students’ undesirable behaviour and conduct. Fifth, immense attention to curriculum mapping, integrated learning, and lesson planning will be required. Last, pastoral care responsibilities that include social and emotional support strategies will help provide the foundation to support teaching and learning. 

In conclusion, the principal elements that make teaching and learning possible and attainable, are the teachers who will be required to learn new skills and approaches to fast-track recovery of learning. If the lockdown is lifted and schools are reopened, the number of learners must be reduced dramatically from the average of 50 to a maximum of 20 learners in a classroom in order to maintain social distancing.

Prof Thidziambi Phendla is currently Manager of Work-Integrated Learning at the University of the Free State. She is the Founder and Director of the Domestic Worker Advocacy Forum (DWAF) and the Study Clinic Surrogate Supervision; and Chair of the Council of the Tshwane North TVET College (ministerial appointment).


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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