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17 February 2025 | Story Andre Damons | Photo Supplied
Prof Carolina Pohl-Albertyn
Prof Carlien Pohl-Albertyn is the NRF SARChI Research Chair in Pathogenic Yeasts at the UFS.

A new study by researchers from the University of the Free State (UFS), the National Health Laboratory Service, and the University of Venda has confirmed for the first time that common brown locusts are carriers of pathogenic yeasts that can cause severe infections in humans – especially in people with compromised immune systems or who are seriously ill.

The study, ‘South African brown locusts, Locustana pardalina, hosts fluconazole resistant, Candidozyma (Candida) auris (Clade III)’, highlights for the first time the presence of the pathogenic (disease-producing) fungal yeast C. auris in the digestive tract of the locusts, and shows their potential in disseminating this emerging pathogen. The research started in April 2022, when 20 gregarious (swarming) adult locusts were collected during a large locust outbreak which occurred from September 2021 to May 2022 in the semi-arid Eastern Karoo region in the Eastern Cape. The study is still under peer review.

According to Prof Carlien Pohl-Albertyn, National Research Foundation (NRF) SARChI Research Chair in Pathogenic Yeasts, three C. auris strains were isolated from three different adult locusts, two of which also harboured strains of another potentially pathogenic yeast, Candida orthopsilosis. “The fact that we were able to isolate C. auris from 15% of the sampled locusts, using non-selective media and a non-restrictive temperature of 30°C, may indicate that C. auris is abundant in the locusts and that specific selective isolation is not mandatory,” Prof Pohl-Albertyn said.

“Interestingly, C. auris was isolated from the fore- and hindgut of the locusts. Isolation from the foregut, which is dedicated to food intake and storage, filtering and partial digestion, indicates that C. auris was probably obtained by the locusts via feeding activities. Isolation from the hindgut confirms that C. auris can survive the digestive processes in the midgut and is likely to be released back into the environment via faeces.”

Healthy humans are not at great risk

One of the C. auris strains was studied in more detail. This strain was not resistant to disinfectants but showed decreased susceptibility to the common antifungal drug fluconazole. This is a characteristic of this yeast species and thus not surprising. Most of the emerging pathogenic yeasts show this intrinsic resistance. This highlights the urgent need to discover and develop new antifungal drugs.

Prof Pohl-Albertyn, also a Professor of Microbiology in the UFS Department of Microbiology and Biochemistry, says, “Healthy humans are not at great risk for infection by this yeast and there is currently no proof that ingestion may be harmful to them. This is unfortunately not the case for people with compromised immune systems or who are seriously ill. However, few susceptible people come into direct contact with the locusts in South Africa.”

She added that there are treatment options available, using other antifungal drugs, but C. auris can become resistant to all the currently available antifungal drugs.

Importance of the study

“The fact that locusts are a food source for other animals, such as birds, could lead to eventual distribution of the yeast to people. In other countries, wild locusts are a food source for humans and there more direct transmission may be possible,” Prof Pohl-Albertyn said.

She explained that this study tries to answer questions regarding the natural hosts of this emerging pathogen and how it may facilitate the spread of the pathogen to the rest of the environment. The study is one part of the puzzle regarding how new pathogens may emerge from the environment and spread to people.

“One of the questions in the field of pathogenic yeasts is how C. auris was able to emerge as a pathogen in several different countries in a relatively short period. It is well known as a hospital-acquired pathogen, but it is not known where in the environment it occurs naturally, and which environmental factors may have shaped its evolution and ability to cause human infections. This has implications for the prevention of the spread of this specific yeast species, as well as our preparedness for new pathogenic yeasts that may be emerging from the environment.”

News Archive

UFS Centenary 2004 / 2005 October (centenary) fest Activities
2004-10-08

Friday, 08 October 2004
17:00 – 24:00
Callie Human Centre, UFS
Macufe Rock Concert
With: Rooibaardt, Karen Zoid, The Narrow, F****polisiekar, Stuurbaard Bakkebaard (from the Netherlands), DJ Bob, Ready D, Neva Me.
Cost : R50-00
Bookings : Pacofs (051-447 7772)

Sunday, 10 October 2004
16:00 – 18:00
Callie Human Centre, UFS
Macufe Three Tenors Concert
With: Phillip Kotze, Chris Coetzer and Du Preez Stolz, as well as Angela Kerrison. Free State Symphony Orchestra conducted by Chris Dowdeswell.
Cost :R60-00 (adults), R40-00 (children, scholars, students and pensioners)
Bookings : Pacofs (051-447 7772)

Tuesday, 12 October 2004
11:00 – 15:00
Centenary Complex, UFS
Inauguration of Centenary Complex
Open day with a variety of musical recitals in different rooms
Cost : Free
Enquiries : Elize Rall (051-401 3382)

15:00 – 17:00
Parking area next to the Centenary Complex, UFS
Kovsie Mosaic Day
Collage of the Century, Dance to the beat, Cultural Cartoon,
Who’s line is it anyway?
Cost : Free
Enquiries : Louis Botha (051-401 2819) or
AC Geldenhuys (084 585 3338)

Wednesday, 13 October 2004
19:00
Centenary Complex, UFS
Première of documentary film : The Life and Legacy of  King Moshoeshoe
Note : By invitation only
Enquiries : Elize Rall (051-401 3382)

Thursday, 14 October 2004
18:45 – 21:00
Red Square (in front of Main Building), UFS
Centenary Honorary Doctorate Degree Graduation Ceremony
Conferred on: Me. Antjie Krog, Prof. Jakes Gerwel, Mr. Karel Schoeman, Dr. Frederick van Zyl Slabbert, Prof. Saleem Badat, Dr. Khotso Mokhele, Prof. Robert Bringle, Prof. Leo Quayle, Prof. Jack de Wet, Prof. Kerneels Nel (posthumously), Prof. Boelie Wessels and Prof. Jaap Steyn .
Cost : Free. Please RSVP if you would like to attend.
Enquiries : Elize Rall (051-401 3382)

Friday, 15 October 2004
18:30
Centenary Complex, UFS
Alumni Dinner and Centenary Award Ceremony
Approximately 140 centenary medals will be awarded in acknowledgement of exceptional contributions to the development of the University. The award ceremony is followed by the Alumni dinner in the Callie Human Centre.
Cost : R100-00/person
Enquiries : Elize Rall (051-401 3382)

15:00 (to 12:00, Saturday, 16 October 2004),
UFS campus
Reunion : Momentum Adventure and Expedition Association
Including : Setting up of the Kovsie Momentum base camp, champagne breakfast and abseiling.
Cost : R50-00/person for breakfast
Enquiries : Gerrit van der Merwe (072 4317 153) or
Niel Fraser (082 772 5642)
Website : www.uovs.ac.za/associations/momentum_hrcc.

19:00 (to 11:00 Sunday, 17 October 2004)
Reunion : Cantare Revue Group
Including : Formal dinner, budget show, bring and braai, church service.
Cost : R100-00/person for the dinner
Enquiries : Louis Botha (051-401 2819)

19:00 (to 24:00 Saturday, 16 October 2004
Reunion : House NJ van der Merwe
Including : Senior Student’s Association and concerts
Cost : R5-00/person
Enquiries : Tutu Ntlathi (051-401 4122 / 072 865 2227)

Saturday, 16 October 2004
09:00 – 10:00
Committee Room 120, Faculty of Theology
Founding of Theology Alumni Association
Enquiries: Henna Nel (051-401 2669)

10:00 – 12:00
Parking area, CR Swart Building, UFS
Alumni Campus Tour
Including : Visits to the new physical developments on campus
Cost : Free
Enquiries : Jeanette Jansen (051-401 3594)

10:00 – 12:00
Sonnedou gazellie (next to NJ van der Merwe Residence), UFS
Reunion : Ladies’ Tea
Visit our new gazellie and find out what Sonnedou is up to these days.
Cost : R25-00/person
Enquiries : Anne-Marie Delport (072 109 0507)

12:00 – 16:00
JBM Hertzog Residence (garden in front of Senior Student’s Association), UFS
Reunion : Braai
Cost : Approximately R20-00/person
Enquiries : Hattingh Bornman (084 240 5226)

12:00 Vergeet-my-nie Residence, UFS
Reunion : Braai
Bring and braai. We supply the facilities. Bring old photographs and stories. Enjoy Aunt Juls’ last visit.
Cost : Free
Enquiries : Mari Jordaan (051-444 2832/072 392 4444)

12:00 HF Verwoerd Residence Senior Student’s Association, UFS
Reunion : Spit roast
Cost : R60-00/person
Enquiries : Jan-Chris Landman (051-401 3613 / 082 664 6062)

18:30 Floreat Hall, Bloemfontein Civic Centre (Braam Fisher Building)
Irawa 60 Reunion
For all former editors, former and current main editorial staff and coworkers
Cost : R100-00/person
Enquiries : Sanri van Wyk (072 333 1011)
Elzette Boucher (072 180 6265)

19:00 – 24:00 Red Square (in front of Main Building), UFS
Informal Alumni Reunion
Spit roast and stories in a marquee
Cost : R60-00/person
Enquiries : Elize Rall (051-401 3382)

Sunday, 17 October 2004
10:00 – 11:00
Kovsie Church
Church Service

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