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New study finds emerging pathogen inside brown locusts

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

Student leaders 2012/13 announced

2012-08-30

Ready for the task - Sabelo Khumalo, SRC President of the Qwaqwa Campus and William Clayton, SRC President of the Bloemfontein Campus.
Photo: Johan Roux
31 August 2012

The 2012/13 elections for the Student Representative Councils (SRC) of the University of the Free State were completed successfully and show meaningful support for the changes in student governance adopted by students across campuses over the past two years.

The SRC elections at the Qwaqwa Campus were completed on 23 August 2012, while the elections at our Bloemfontein Campus took place on 27 and 28 August 2012.

The SRC Elections at our Bloemfontein Campus showed a voter turnout of 4516 votes (30.8%), with the elections at the Qwaqwa Campuses showing 1753 votes (46%) – both campuses reached the required quorums and the IEA (Bloemfontein Campus) and IEC (Qwaqwa Campus) declared the elections free and fair and announced the results as a true reflection of the will of the student bodies at the campuses.

The full SRC at Bloemfontein Campus now consists of 62% black and 38% white, and 53% female and 47% male members.

In the Qwaqwa elections, SADESMO achieved 46, 38% of the vote, with SASCO, PASMA and NASMO each achieving 30,23% and 8,39% and 14,26%, respectively.

The successful elections at Bloemfontein Campus show that the detailed transformation of student governance introduced by students at the Campus in 2010 and adopted by the university in 2011, succeeded in mobilizing greater participation of students in governance and representation. These changes in the main included a shift to independent candidacy for elective portfolios (12 seats) and organizational candidacy in nine sub-councils that holds ex officio seats on the SRC. Changes also included the establishment of student representative seats in faculty governance and management forums and the adoption of a reviewed Central SRC Constitution. Ex officio seats hold full and equal constitutional authority in the SRC.

Students at Qwaqwa Campus introduced additional portfolios to its SRC, including ex-officio seats for academic affairs, arts and culture, commuter students, Rag Community Service, religious affairs, residences and sports.

A joint sitting of the Campus SRCs will establish the Central SRC 2012/13 on 9 September 2012.

As a further opportunity for participation in and the development of student governance and representation, the current Central SRC herewith also announces its recent adoption of a student governance advisory programme, namely the UFS Student Elders Council (SEC).

The SEC is established as a combined programme between the Central SRC and the Dean of Student Affairs and will consist of selected senior student leaders from all campuses who completed their terms of office, apply and are appointed to the Elders Council by the Central SRC.

The Council will serve as an advisory structure to the Central SRC and other student structures in support of the continuous development of student governance and representation of the student body at the university.

The SEC will advise the Central SRC to be constituted following the constitution of the respective Campus SRCs.

The SRC members at the Bloemfontein Campus are:

President: Mr William Clayton

Vice-President: Mr Bonolo Thebe

Secretary: Ms Karis-Robin Topkin

Treasurer: Mr Pieter Coetzee

Arts & Culture: Ms Chanmari Erasmus

Accessibility & Student Support: Ms Gene McCaskill

First-generation Students: Ms Tanya Calitz

Legal and Constitutional Affairs: Ms Nokuthula Sithole

Media, Marketing & Liaison: Ms Neo Chere

Sport: Mr Tshepo Moloi

Student Development & Environmental Affairs: Ms Thabisile Mgadi

Transformation: Ms Koketso Mofokeng

Dialogue & Ex officio: Associations Council: Mr Anesu Ruswa

Academic Affairs & Ex officio: Academic Affairs Council: Ms Nombuso Ndlovu

Residence Affairs & Ex officio: Residences Council: Mr Johann Steyn

City Residence Affairs & Ex officio: Commuter Council: Mr Michael van Niekerk

Postgraduate Affairs & Ex officio: Postgraduate Council: Mr Fadeyi Akinsuyi

International Affairs & Ex officio: International Council: Ms Tumelo Moreri

Student Media Affairs & Ex officio: Media Council: Mr Jamal-Dean Grootboom

RAG Community Service & Ex officio: RAG Fundraising Council: Mr Jaco Faul

RAG Community Service & Ex officio: RAG Community Service Council: Ms Keneue Mahloana

The SRC members at the Qwaqwa Campus are:

President General: Mr S Khumalo

Deputy President: Mr P T Lenka

Secretary General: Mr D Khethang

Treasurer General: Mr S I Sithole

Media & Publicity: Mr S N Ntombela

Politics & Transformation: Tbc

Student Development & Evironmental Affairs: Tbc Academic Affairs: Mr T Molawude

Arts & Cultural Affairs: Mr T Nkohli

Off-Campus Students: Mr B Mtshali

RAG, Community Service & Dialogue: Ms S F Mlotya

Religious Affairs: Ms D C Khau

Residence & Catering Affairs: Ms Z Mzolo

Sports Council: Mr S Mngomezulu

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