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11 December 2019 | Story Leonie Bolleurs
Aids read more
According to Global Statistics, there were approximately 37,9 million people across the globe with HIV/Aids in 2018. They also state that in 2018, an estimated 1,7 million individuals worldwide became newly infected with HIV. 

In the city of Masvingo, Zimbabwe, Claris Shoko is a Statistics lecturer at the Great Zimbabwe University. In her PhD thesis at the University of the Free State (UFS) in the Department of Mathematical Statistics and Actuarial Sciences, she presented the argument that the inclusion of both the CD4 cell count and the viral-load counts in the monitoring and management of HIV+ patients on antiretroviral therapy (ART), is helping in reducing mortality rates, leading to improved life expectancy for HIV/Aids patients. 

She received her doctoral degree at the December UFS Graduation Ceremonies, with her thesis: Continuous-time Markov modelling of the effects of treatment regimens on HIV/Aids immunology and virology. 

CD4 cell count and viral-load count

Dr Shoko explains: “When the human immunodeficiency virus (HIV) enters the human body, the virus attacks the CD4 cells in their blood. This process damages CD4 cells, causing the number of white blood cells in the body to drop, making it difficult to fight infections.”

“Clinical markers such as CD4 cell count and viral-load count (number of HIV particles in a ml of blood) provide information about the progression of HIV/Aids in infected individuals. These markers fully define the immunology and the virology of HIV-infected individuals, thereby giving us a clear picture of how HIV/Aids evolve within an individual.”

Dr Shoko continues: “The development of highly active antiretroviral therapy (HAART) has helped substantially to reduce the death rate from HIV. HAART reduces viral load-count levels, blocking replication of HIV particles in the blood, resulting in an increase of CD4 cell counts and the life expectancy of individuals infected with HIV. This has made CD4 cell counts and viral-load counts the fundamental laboratory markers that are regularly used for patient management, in addition to predicting HIV/Aids disease progression or treatment outcomes.”

In the treatment of HIV/Aids, medical practitioners prescribe combination therapy to attack the virus at different stages of its life cycle, and medication to treat the opportunistic infections that may occur. “The introduction of combined antiretroviral therapy (cART) has led to the dramatic reduction in morbidity and mortality at both individual level and population level,” states Dr Shoko.

Once HIV-positive patients are put on cART, the effectiveness of treatment is monitored after the first three months and a further follow-up is done every six months thereafter. During the monitoring stages, CD4 cell count and viral load is measured. Patients are also screened for any tuberculosis (TB) co-infection and checked for any signs of drug resistance. These variables determine whether or not there is a need for treatment change. 

She continues: “Previous studies on HIV modelling could not include both CD4 cell count and viral load in one model, because of the collinearity between the two variables. In this study, the principal component approach for the treatment of collinearity between variables is used. Both variables were then included in one model, resulting in a better prediction of mortality than when only one of the variables is used.”

“Viral-load monitoring helps in checking for any possibilities of virologic failure or viral rebound, which increases the rate of mortality if not managed properly. CD4 cell count then comes in to monitor the potential development of opportunistic infections such as TB. TB is extremely fatal, but once detected and treated, the survival of HIV/Aids patients is assured,” Dr Shoko explains.

Markov model

She applied the Markov model in her study. The model, named after the Russian mathematician Andrey Markov, represents a general category of stochastic processes, characterised by six basic attributes: states, stages, actions, rewards, transitions, and constraints. 

According to Dr Shoko, Markov models assume that a patient is always in one of a finite number of discrete states, called Markov states. All events are modelled as transitions from one state to another. Each state is assigned a utility, and the contribution of this utility to the overall prognosis depends on the length of time spent in each state. For example, for a patient who is HIV positive, these states could be HIV+ (CD4 cell count above 200 cells/mm3), Aids (CD4 cell count below 200 cells/mm3) and Dead.

“Markov models are ideal for use in HIV/Aids studies, because they estimate the rate of transition between multiple-disease states while allowing for the possible reversibility of some states,” says Dr Shoko, quoting Hubbard and Zhou.

“Relatively fewer HIV modelling studies include a detailed description of the dynamics of HIV viral load count during stages of HIV disease progression. This could be due to the unavailability of data on viral load, particularly from low- and middle-income countries that have historically relied on monitoring CD4 cell counts for patients on ART because of higher costs of viral load-count testing,” Dr Shoko concludes

News Archive

Official opening ceremony of the UFS Qwaqwa Campus
2006-02-15

Official opening ceremony of the UFS Qwaqwa Campus
11th February 2006 – Multipurpose Hall

Opening Speech:
Prof. Peter A. Mbati
Campus Principal

Successfully rising to the challenges of incorporations and mergers – developing a vibrant and academically stimulating satellite campus of the University of the Free State.

Thank you Mr. Program Director and good morning ladies and gentlemen.

I wish to once again welcome all of you to the official opening ceremony of the University of the Free State QQ campus.  Thank you for taking time to share with us an important date in our campus academic calendar.  I bring you greetings from our Rector and Vice Chancellor Prof. Frederick Fourie.

During such occasions we try and reflect on important matters that have affected us as an institution in the preceding year, commit ourselves to specific objectives for the current year, while planning for the proceeding year.

Today I shall be talking on Successfully rising to the challenges of incorporations and mergers – developing a vibrant and academically stimulating satellite campus of the University of the Free State’.

SRC inauguration
I would like to congratulate the SRC President and the entire SRC leadership for being elected into important positions of student leadership and authority. 

As a university we are proud of the quality of our student leadership on the Qwaqwa campus.  I am confident that you young leaders will rise to the challenges of your office and discharge your duties with diligence and without fear or favour.  That you will rise above your party affiliations and provide effective leadership to the entire student body on campus.
                              
Leadership is complex and requires you to be objective, just and fair in your approach to the many challenges that you will encounter.  You will be judged not by the populist decision that you take when confronted with difficult choices, but rather, on the wisdom that you exercise in reaching consensus in decision making processes.

The era when management and student leadership viewed each other with suspicion and as adversaries is long gone.  Management, academic and administrative staff, parents and students must have common agendas in as far the  quality growth and development of our university is concerned and to strive towards academic excellence.  I leave the challenge to you students, and more so to the inaugurated student leaders to define your agenda in achieving this noble objective.  I trust that you will make the right choices.

Brief history of incorporation
On the recommendations of the National Working Group of Higher Education, the Qwaqwa Campus of the then University of the North was incorporated into the University of the Free State on 1st January 2003.  We suddenly had to move from a campus that was originally semi-autonomous and with its own culture developed over almost 20 years, into a campus that had to operate as a fully integrated campus of the UFS, a 100 year old institution with its distinct culture.

Following incorporation, we not only had to continue with our core business of teaching, learning, research and community service, but we also had to engage in other important aspects such as exploring the most appropriate models of governance for the campus, encouraging dialogue and interactions at all levels between personnel at the different campuses with a view to developing trust between colleagues. And with the added dimensions such as participation in the transformation task team we in effect are at the fore front of developing a new institutional culture at the UFS and a truly South African University.

UFS Strategic objectives
The strategic and transformation priorities of the University of the Free State for 2006 – 2008 as approved by the Executive Management at its retreat in January 2006 are:

  • Quality and Excellence
  • Equity, diversity and redress
  • Financial sustainability
  • Regional co-operation and engagement

Central to this priority is the integration of the Qwaqwa campus as a valuable constituent part of the UFS, and the strategic reconfiguration of the campus in order that the UFS can play a meaningful role in regional engagement and development.

  • National leadership

The five strategic objectives cannot be viewed in isolation and run simultaneously and in concert with each other. 

The Question must therefore be what we on the QQ campus, staff and students, parents and our broader community are willing to do to achieve these strategic objectives. The reconfiguration and strategic planning of this campus, and therefore its success, must be a collaborative effort between colleagues at QQ and on the main campus.  We must all be ready to work together, to plan together, to shoulder responsibilities together and sometimes, to share the pain and disappointments together. 

The second question must therefore be: are we prepared to go that extra mile for our campus to ensure that we claim our rightful stake within the ranks of well respected academic institutions of higher learning in this country?  At this point in its history this campus requires committed men and women from across the cultural spectrum who appreciate the challenges ahead of us and who are ready to give of their best and to constructively engage at all levels to make this dream a reality.  Because this dream is possible and this dream will be realized!

Quality and Excellence (1st strategic objective)

As mentioned by the Rector in his speech at the official opening ceremony of the university on the main campus on Friday 3rd February, the university will in 2006 pay extra attention to Quality and Excellence.  This is informed by the Higher Education Quality Committee’s (HEQC) institutional audit which is scheduled to take place this year.  Our university as well as several other HEI’s will be subjected to this audit.  This will call for a lot of hard work on your part in preparation for a successful audit and in this regard therefore I request for your cooperation.

As a further step in confirming our commitment to quality and excellence, we have simultaneously introduced on the QQ campus and the main campus workshops on performance management systems to a cohort group.  This will be expanded in 2006 to a wider group of managers on the QQ campus to include among others all Program Heads and Subject Heads. PMS is an invaluable tool for fair, effective and efficient management of a very important resource on campus – the human resource.  Benefits of PMS include among others:

  • Instilling and enriching a culture of performance management (quality assurance) as an integral part of the day to day functioning of staff at the campus
  • Improving staff performance through mentoring, development and training

Tri campus project
One of the more important projects that we as a university undertook in 2005 was the Tri Campus Project which was coordinated by the Free State Higher Education Consortium (FSHEC) through Niel Butcher and Associates consultants.

The Tri-Campus project focused on the strategic planning for higher education campuses in the Free State that have been incorporated with UFS and CUT during the reshaping of the South African higher education landscape. The Bloemfontein Vista campus and the Qwaqwa campus of the University of the North were incorporated with the UFS, and the Welkom Vista campus with the CUT.

The planning process involved a range of research and consultation activities during the course of 2005. This included:

  • Conducting situational analyses of the Qwaqwa campus during which staff and students were widely consulted;
  • Consulting with the campus and with a range of stakeholders in the sub-region
  • Review of the Free State Provincial Growth and Development Strategy and Integrated Development Plans (IDPs) of the regions and other research of relevance to the sub-regions, province and country.

An operational framework for the reconfiguration of the campus with a range of possible Program Qualification Mixes has been produced.  In December 2005, the Rector, the Vice Rector Academic Planning Prof. Magda Fourie and I discussed this document with senior members of the DoE in Pretoria, and we will soon be meeting with the National Minister of Education Me Naledi Pandor for her guidance and to seek support in the further refinement of the document and subsequent implementation.

Recapitalization
This year a further R 6 M has been budgeted for recapitalization.  In about two weeks time the third of phase of renovations on campus will commence and attention will be given to the administration building, the humanities and the outstanding work in the lecture hall complex.  There- after the library, sciences and education buildings will follow.  As you will recall a substantial portion of the R 8.4 million in 2005 was used to upgrade the student residences and the lecture hall complex.

I am certain that the renovations and upgrading of our infrastructure and physical facilities including landscaping will create an enabling environment for you to enjoy your work and studies on this campus.

Renovations come with some measure of inconveniences and I therefore wish to request for your patience and support during this period.

Closing remarks
There is a heightened spirit of optimism on what the future holds for this campus.  This is evident when I talk to a large cross section of staff and students of this campus – and I therefore invite all of you to come and be partners with us on this journey of optimism and hope of what the future holds for the UFS – QQ campus.

Thank you and God bless!

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