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Fungi in water pose great risk to immune-compromised individuals

24 July 2023 | Story André Damons | Photo Supplied

Yeast and other filamentous fungi, which pose a great risk to the health of immune-compromised or suppressed individuals, can be found in various drinking water sources such as ground, spring, surface, and tap water. These opportunistic pathogens may cause severe to fatal infections and can range from superficial to bloodstream or systemic infections.

This is according to Tyla Baker, a postgraduate student in the Department of Microbiology and Biochemistry at the University of the Free State (UFS). She is studying for her MSc degree in Microbiology under the supervision Prof Carlien Pohl-Albertyn, National Research Forum (NRF) SARChI Research Chair in Pathogenic Yeasts. Prof Jacobus Albertyn and Dr Jolly Musoke are her co-supervisors.

Baker says the fungi in the water highlights that current water treatment processes are not efficient in their removal from water destined for household use. “These infections may not be harmful to people with healthy immune systems, but do pose a great risk to the health of immune-compromised or suppressed individuals.

Definite possibility to contract fungal infections from polluted water

“As the number of people with immune systems that are less functional (e.g. premature babies, elderly persons, people with cancer, diabetes or other serious diseases, HIV+ persons, transplant patients) increases, the number of people at risk of fungal infection also increases,” says Baker.

According to Baker, a previous study done in Brazil has identified yeast in bottled mineral water as well as municipally supplied tap water. The potential risk to contract fungal infections from polluted water sources is a definite possibility but more research is required to fully understand and determine the level of risk and the extent of its effects, she says. In the context of Mangaung, it is a concern that untreated water from sewage works as well as other sewage often leaks into the environment (as evidenced by numerous recent articles in local newspapers). These waters are potential carriers of large numbers of pathogens (including pathogenic yeasts/fungi) that may increase the risk to people coming into contact with it.

Baker says there is a good chance people are consuming these kinds of micro-organisms daily, considering that yeast and other filamentous fungi can also form biofilms inside pipes and spread as the impact of water flow dislodges these cells. “People will not even be aware that they are consuming these micro-organisms, some fungi are considered nuisance microbes and may cause a change in the smell and taste of water which may act as an indicator that the water is contaminated, but tests would be needed to confirm this,” she says.

The effects of consuming these fungi are still a grey area of research since the full extent of the consumption of yeast is still unknown, but there are studies being conducted to elucidate the full impact of this occurrence, says Baker. The risk depends on the immune status of the person, the specific species of yeast/fungus ingested, and the number of cells/spores ingested.

Culture-dependent and independent methods

“It is important to know that many pathogenic yeasts and other fungi are opportunistic pathogens, meaning they infect individuals whose immune systems are compromised due to various reasons such as illness (HIV/AIDS, cancer, TB etc.), undergoing organ transplants or even something as simple as using antimicrobial agents such as antibiotics.

“Taking this into account, along with the HIV/AIDS statistics in South Africa, which has a prevalence rate of 13,7% with approximately 8,2 million people in 2021 living with HIV, these individuals are more susceptible to infection by these opportunistic pathogens. Some of these pathogenic yeasts are also multidrug resistant or show resistance to readily available antifungals, such as fluconazole, which hinders the ability of healthcare professionals to efficiently treat infections to avoid fatal/severe outcomes,” explains Baker.

For her studies, she will be testing for fungi in water by using a combination of culture-dependent and independent methods to try and identify yeast present in wastewater. Baker says culture-dependent techniques will include culturing (growing) yeast on an appropriate medium while culture-independent techniques will include more intricate molecular work in the form of a multiplex PCR (polymerase chain reaction) which will enable her to identify an array of pathogenic yeasts present in samples.

According to Baker, people can stay safe by boiling water before drinking it, although temperatures above 100°C are required to kill most harmful microbes. Regular cleaning of shower heads and faucets help to prevent build-up which may act as a surface to which fungi will attach to and grow. Another way to stay safe is to maintain and regularly inspect water filters for damage and avoid contact with untreated sewage.

News Archive

State of our campuses: Impact of non-completion of the 2016 academic year on UFS students

2016-10-08

Dear Parents/Guardians and Students,

Impact of non-completion of the 2016 academic year

The University of the Free State (UFS) reiterates its support and commitment to the cause of free higher education. We have stated our position in all the available spaces. We want to work with UFS students to put pressure on the government to commit itself to accept the many suggestions put forward to make free education possible within a negotiated timeframe.

We are also seriously committed to our responsibility of providing education to all students enrolled at the university. We are doing our outmost to ensure that we can resume academic activities next week.

Description: " Academic non-completion 2016 Tags: " Academic non-completion 2016

We want to bring to your attention what will happen to individual students if the UFS cannot resume classes fully on Monday 10 October 2016.

Currently we have extended the academic year by one week. Some faculties are working on Saturdays and Sundays, starting earlier and finishing later to complete the material that needs to be taught and the practical work that students need to do to be able to write exams.

In the three biggest faculties at the university: Education, the Humanities, and Natural Sciences, this is what will happen:

Education will fail to graduate 1 193 students
Humanities will fail to graduate 1 125 students
Natural and Agricultural Sciences will fail to graduate 1 390 students

In the professional faculties: Economic and Management Sciences, Health Sciences, and Law, this will happen:

Economic and Management Sciences will fail to graduate 997 students
Health Sciences will fail to graduate 633 students
Law will fail to graduate 619 students

In total, approximately 6 000 students will not receive complete transcripts of their degrees and the certificates for their qualifications.

The university currently has 3 238 students on NSFAS bursaries. None of these students will be able to apply for bursaries for the lost year. They will be regarded as having failed or not completed their courses. They will not only miss this year, but the opportunity of studying in the future.

These students come from families to which their success in higher education was supposed to mean a change in the future of the entire family. Some parents/guardians hold more than one job to be able to pay tuition fees.

In not allowing the year to continue and students to finish, we are throwing away the efforts that entire families of poor people have made for four or five years to put their children through university. The promise of free education for future generations means nothing to these families who are poor in the present.

In terms of the academic calendar, it is a false argument to say that universities will be able to enrol first-years, because what 2016 students will miss, is the second semester.

We do not have the capacity to teach double the number of students in the second semester. This also misses the point that those students who were completing modules in order to graduate, will waste an entire year (assuming they have funding) to complete their degrees. This argument does not see the knock-on effect that students, not promoting in modules from first to second and second to third year, etc., will have. Finally, this also misses the point of what will happen to students who have to repeat first-semester modules.

In terms of academic staff, students are discounting the willingness of academic staff to teach double or to have the academic year extended by approximately six weeks between teaching and examinations. The same can be said for all the administrative and support staff required for running the university.

In our case, all the students in the University Preparation Programme (UPP) on the South Campus in Bloemfontein will be stuck without being able to move into mainstream modules, preventing a new intake of UPP students for 2017. These are the poorest and most disadvantaged students at the UFS.

It is absolutely necessary to find a means of protest and political action that will not jeopardise the future of current students and the country’s desperate need for critical skills. The interdict against violent protest secured by the UFS is still in force. The police will intervene if the interdict is not respected and the UFS will have no control over police actions.

We trust that parents/guardians and students understand the implications of the situation.

Kind regards,

Prof Nicky Morgan
Acting Rector
University of the Free State

Released by:
Lacea Loader (Director: Communication and Brand Management)
Telephone: +27 51 401 2584 | +27 83 645 2454
Email: news@ufs.ac.za | loaderl@ufs.ac.za
Fax: +27 51 444 6393

State of our campuses #11: Academic activities on UFS campuses continue

State of our campuses #10: Impact of non-completion of the 2016 academic year on UFS students

State of our campuses #9: Academic programme on all UFS campuses to resume on Monday 10 October 2016

State of our campuses #8: UFS extends vacation as from 28 September until 7 October 2016, 28 September 2016

State of our campuses #7: All three UFS campuses will be closed today, 27 September 2016.

State of our campuses #6: All UFS campuses reopen on Tuesday 27 September 2016

State of our campuses #5: UFS campuses to remain closed on Monday 26 September 2016

State of our campuses #4: Decisions about the UFS academic calendar

State of our campuses #3: UFS campuses closed until Friday 23 September 2016

State of our campuses #2: UFS Bloemfontein and South Campuses closed on Tuesday 20 September 2016 (19 September 2016)

State of our campuses #1: Academic activities suspended on UFS Bloemfontein Campus (19 September 2016)

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