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18 March 2021 | Story Leonie Bolleurs
Famelab
Abdullahi Jamiu, who is working on his master's degree in Microbiology, was adjudicated as the FameLab winner at the Central Regional Heat and will represent the region at the national semi-finals.

Abdullahi Jamiu, who is working on his master's degree in Microbiology in the Department of Microbiology and Biochemistry at the University of the Free State (UFS), was recently announced as the FameLab winner at the Central Regional Heat and will represent the region at the national semi-finals.

Abdullahi, who plans on pursuing a doctoral degree after his master’s, says he wants to establish himself as an academic in microbiology.

Making science simple
He says he decided to participate in the FameLab competition because he is very passionate about communicating science. “Science communication affords me the opportunity to not only take my research outside of the lab space, but also to communicate it to the lay audience. Moreover, science is often perceived by the general public as difficult and unfathomable. As such, science communication programmes promote the simplification and better understanding of scientific knowledge in the community,” he says.

FameLab is coordinated by the South African Agency for Science and Technology Advancement, the British Council, and Jive Media Africa.

According to Abdullahi, the experience was mind-blowing. “It gave me the opportunity to compress my 200-page master's thesis into a three-minute talk in a way I had never thought was possible. Having to present virtually and adjust to the ‘new normal’ was quite challenging,” he adds.

“The overall experience was enlightening and engaging, and at the same time entertaining,” says Abdullahi.

Impressing the judges with his charisma, engagement with the audience, and use of props, Abdullahi’s presentation focused on how the exploration and exploitation of a ‘combination therapy’ approach to drug discovery could help to effectively combat fungal infections, which are the common comorbidities in immune-compromised individuals, including those living with HIV, cancer, and COVID-19.

Revealing an enigma
His fascination with microbiology started at a young age. “How very tiny, microscopic creatures, invisible to the unaided eye, are able to infect and sometimes kill both healthy and immune-compromised individuals, was an enigma to me as a little boy. My desire to unravel this mystery triggered my interest in microbiology, and the more I learn, the more enthusiastic I become to broaden my horizon in this challenging yet exciting field of study,” he says.

Abdullahi would like to one day make a difference by conducting relevant research aimed at contributing to finding lasting solutions to the lingering menace posed by pathogenic microbes. “Moreover, I am very passionate about facilitating the transfer of scientific knowledge to the next generation,” Abdullahi concludes.

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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