Dorina Onoya

New insights into HIV epidemic in South Africa: key findings from the National HIV Prevalence, Incidence and Behaviour Survey, 2012

This article presents key findings from the 2012 HIV prevalence, incidence and behaviour survey conducted in South Africa and explores trends in the HIV epidemic. A representative household based survey collected behavioural and biomedical data among people of all ages. Chi-squared test for association and formal trend tests (2002, 2005, 2008 and 2012) were used to test for associations and trends in the HIV epidemic across the four surveys. In 2012 a total of 38 431 respondents were interviewed from 11 079 households; 28 997 (67.5%) of 42 950 eligible individuals provided blood specimens. HIV prevalence was 12.2% [95% CI: 11.4–13.1] in 2012 with prevalence higher among females 14.4% than males 9.9%. Adults aged 25–49 years were most affected, 25.2% [95% CI: 23.2–27.3]. HIV prevalence increased from 10.6% [95%CI: 9.8–11.6] in 2008 to 12.2% [95% CI: 11.4–13.1] in 2012 (p < 0.001). Antiretroviral treatment (ART) exposure doubled from 16.6% in 2008 to 31.2% in 2012 (p < 0.001). HIV incidence in 2012 among persons 2 years and older was 1.07% [95% CI: 0.87–1.27], with the highest incidence among Black African females aged 20–34 years at 4.5%. Sexual debut before 15 years was reported by 10.7% of respondents aged 15–24 years, and was significantly higher among male youth than female (16.7% vs. 5.0% respectively, p < 0.001). Reporting of multiple sexual partners in the previous 12 months increased from 11.5% in 2002 to 18.3% in 2012 (p < 0.001). Condom use at last sex dropped from 45.1% in 2008 to 36.2% in 2012 (p < 0.001). Levels of accurate HIV knowledge about transmission and prevention were low and had decreased between 2008 and 2012 from 31.5% to 26.8%. South Africa is on the right track with scaling up ART. However, there have been worrying increases in most HIV-related risk behaviours. These findings suggest that there is a need to scale up prevention methods that integrate biomedical, behavioural, social and structural prevention interventions to reverse the tide in the fight against HIV.

A Comparison of South African National HIV Incidence Estimates: A Critical Appraisal of Different Methods.

Background The interpretation of HIV prevalence trends is increasingly difficult as antiretroviral treatment programs expand. Reliable HIV incidence estimates are critical to monitoring transmission trends and guiding an effective national response to the epidemic. Methods and Findings We used a range of methods to estimate HIV incidence in South Africa: (i) an incidence testing algorithm applying the Limiting-Antigen Avidity Assay (LAg-Avidity EIA) in combination with antiretroviral drug and HIV viral load testing; (ii) a modelling technique based on the synthetic cohort principle; and (iii) two dynamic mathematical models, the EPP/Spectrum model package and the Thembisa model. Overall, the different incidence estimation methods were in broad agreement on HIV incidence estimates among persons aged 15-49 years in 2012. The assay-based method produced slightly higher estimates of incidence, 1.72% (95% CI 1.38 – 2.06), compared with the mathematical models, 1.47% (95% CI 1.23 – 1.72) in Thembisa and 1.52% (95% CI 1.43 – 1.62) in EPP/Spectrum, and slightly lower estimates of incidence compared to the synthetic cohort, 1.9% (95% CI 0.8 – 3.1) over the period from 2008 to 2012. Among youth aged 15-24 years, a declining trend in HIV incidence was estimated by all three mathematical estimation methods. Conclusions The multi-method comparison showed similar levels and trends in HIV incidence and validated the estimates provided by the assay-based incidence testing algorithm. Our results confirm that South Africa is the country with the largest number of new HIV infections in the world, with about 1 000 new infections occurring each day among adults aged 15-49 years in 2012.

Transactional Sexual Relationships, Sexually Transmitted Infection Risk, and Condom Use among Young Black Women in Peri-Urban Areas of the Western Cape Province of South Africa

BACKGROUND Transactional sexual behavior has been demonstrated as an important factor underlying the HIV epidemic in sub-Saharan Africa. The aim of this study was to evaluate the relationship between having a history of transactional sexual relationships with condom use and STI risk. METHODS Participants completed a behavioral questionnaire in isiXhosa and provided self-collected vaginal swabs which were tested for Chlamydia trachomatis, Neisseria gonorrhea, and Trichomonas vaginalis. Multinomial logistic regression was used to compare condom use rates and sexually transmitted infection (STI) risk among women with a history of transactional sexual relationships to women with a history of casual sexual relationships and those with no history of casual sexual relationships. RESULTS Of the 446 respondents, 223 (50%) reported no history of casual sexual relationships, 94 (23.32%) indicated a history of casual sexual relationships, and among these 119 (26.68%) reported a history of transactional sexual relationships with casual partners. Participants with a history of transactional sexual relationships had a higher rate of condom use with a main partner and a lower prevalence of Chlamydia infection than participants with a history of casual relationships. Participants with a history of transactional sexual relationships were also less likely to have had a STI in the past compared with those who indicated no history of casual relationships. CONCLUSION These results highlight attempts by women who report participation in transactional sex to use condoms. The results also point to possibly concealed risk to STI and HIV among women who indicate no history of transactional sex.

Determinants of multiple sexual partnerships in South Africa

BACKGROUND This paper aims to examine determinants of multiple sexual partnerships (MSPs) among South African men and women using a nationally representative sample. METHODS Quantitative and qualitative data from a 2008 population-based cross-sectional survey were used. The analysis focused on the 6990 (33.6% of total sample) who were 15 years and older and reported sexual activity in the prior 12 months. The qualitative component consisted of 15 focus group interviews investigating values underlying MSP behaviors. RESULTS Predictors of MSP common across gender were race, having a history of STI, being in a short relationships (<1 year) and suspecting the current partner of infidelity. MSP among men enjoyed greater community acceptance and was mainly done for social status. Furthermore, men reporting MSP were mostly younger (15-24 years old) and use condom at last sex. Among women, determinants of MSP included economic vulnerability, younger age at sexual debut and living in formal urban rather than formal rural areas. CONCLUSIONS The data presented in this paper reinforces the importance of MSP as a risk factor for HIV and outline factors that should strongly be considered in strengthening condom use promotion and of partner reduction programs messaging in South Africa.

Psychosocial correlates of condom use consistency among isixhosa-speaking women living with HIV in the Western Cape province of South Africa

Many HIV-positive South African women continue to have unprotected sex. The aim of this cross-sectional study was to assess correlates of condom use consistency among Xhosa-speaking HIV-positive women in South Africa. One hundred and twenty women were recruited from five primary care clinics and completed a questionnaire. Regression analyses indicated that assertive negotiation and self efficacy for condom use were proximal correlates of condom use consistency. Mediation analyses showed that self-efficacy for assertive negotiation is a distal correlate of condom use consistency.We propose a framework of correlates of condom use consistency to inform future intervention development.

Barriers to Recruitment and Retention of HIV-Negative Black South African Women into Behavioral HIV Prevention Programs

Recruitment and retention of participants remain a challenge to the implementation of behavioral HIV prevention programs. The aim of this article is to describe the process and challenges encountered while recruiting and retaining participants in the SISTA South Africa study in particular and to provide an understanding of the barriers to participation in a behavioral HIV prevention program among black HIV-negative women in general. Focus group discussions were conducted with HIV-negative women in three peri-urban townships in the Western Cape Province. The main barriers to participation were competing economic activities and domestic chores, the assumption that HIV prevention programs are mainly for HIV-positive women, HIV stigma, and uncertainties about HIV prevention programs. This study highlights advantages and pitfalls of recruiting from voluntary counseling and testing clinics and provides information for the development of meta-interventions to improve program participation.