Partner notification and treatment outcomes among South African adolescents and young adults diagnosed with a sexually transmitted infection via laboratory-based screening

Contact tracing strategies for infectious diseases: A systematic literature review

Contact tracing has been a crucial public health strategy for breaking infectious diseases chains of transmission. Although many resources exist for disease outbreak management none address the rationale of contact tracing. This comprehensive review aims to evaluate contact tracing strategies, their effectiveness, and health systems governance across various diseases to inform a disease-agnostic contact tracing guideline. This systematic review was registered with PROSPERO (ID: CRD42023474507) and follows Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines. Descriptive and interventional studies in the six official United Nations languages were included, excluding modelling studies and animal-to-human transmission. An electronic search was conducted in Embase, Medline, Medline-in-process, and Cochrane libraries from inception to September 2023. The revised Cochrane Risk of Bias Tool and the Risk of Bias in Non-Randomized Studies of Interventions were used for bias assessment. The search yielded 378 studies, primarily from Europe (29.6%) and North America (21.6%) and focusing on diseases such as the coronavirus disease (COVID-19) (47.4%) or tuberculosis (26.7%). 244 (64.5%) studies addressed contact tracing definitions, commonly based on physical proximity, including duration of contact and sexual partnerships (47.6%) and household exposure (27%). Effectiveness was examined in 330 (87.3%) studies, showing variation across diseases and contexts, with only five studies evaluating epidemiological impacts. Socio-cultural aspects were covered in 166 (43.9%) studies, revealing that stigma and public trust may affect the adherence to contact tracing. Health systems governance was discussed in 278 (73.5%) studies, emphasising the need for coordination among international organisations, national governments, and local health authorities, alongside a sustained and adequately supported workforce. This review provides critical insights into optimising contact tracing strategies. Effective contact tracing requires robust health systems governance, adequate resources, and community involvement. Future research should focus on establishing standardised metrics for comparative analysis and investigating the impact of contact tracing on disease incidence and mortality.

Spectrum of sexual partner types among adults screened for sexually transmitted infections in the Eastern Cape, South Africa

In South Africa, Chlamydia trachomatis prevalence is 14.7% in women and 6.6% in men, while Neisseria gonorrhoeae rates are 6.0% and 3.4%. Partner management, including identifying and screening for STIs, is essential for STI control efforts but challenging due to relationship dynamics, fear of disclosure and stigma. This study aims to understand how adults in the Eastern Cape report partner types when seeking STI care, enhancing partner notification strategies and reducing transmission. From February-August 2023, a cross-sectional evaluation of a Neisseria gonorrhoeae lateral flow assay was conducted among asymptomatic adults aged 18-49 years at four primary healthcare facilities in Buffalo City, Eastern Cape. Participants completed surveys classifying partners into LUSTRUM team's 8 partner types and 5 type-classifications. Data were analyzed using StataSE 17, examining associations between partner types and variables like gender, location, number of sexual partners, and STI test results. A total of 500 men and 400 women (median ages 31 and 32) were recruited. The most reported partner types were main/serious/long-term partners (41%) and girlfriend/boyfriend (29%) or LUSTRUM's 4: established (67%) and occasional partners (28%). Participants reporting main/long-term partners, steady, or boyfriend/girlfriend showed variability in partner numbers. Male adults more commonly reported casual partner types like friends with benefits (21% vs. 9%) and fuck buddy/booty call (9% vs. 3%), with significant associations for super casual/hook-up/meet/one-night stand (p = 0.02). Regional differences in partner types and a significant association between new partners and NG Xpert positivity (p = 0.01) were observed. This study confirms the diverse spectrum of sexual partner types. Findings reveal that men and women may have different relationships, and regional variations suggest context-specific approaches are needed. Identifying partner types can enhance communication and treatment strategies and address significant gaps in partner notification and STI care.

Young people's preferences and motivations for STI partner notification: observational findings from the 2024 Sex, Drugs and Rock 'n' Roll survey

Background Partner notification is an important step in the control of sexually transmissible infections (STIs). STIs remain at high rates among young people and can have serious reproductive consequences if left untreated. This study aimed to determine the preferences and motivations for partner notification among young people in Australia. Methods Quantitative and free-text qualitative data were collected through the 2024 Sex, Drugs and Rock 'n' Roll survey, an annual cross-sectional survey conducted among people aged 15-29years old in Victoria, Australia. Respondents were recruited using convenience sampling through social media advertisements. Counts and proportions were calculated for the preferences and motivations for partner notification by regular and casual sexual partners as well as methods of communication. Inductive content analysis was used to analyse free-text responses. Results The partner notification module of the survey was completed by 1163 people (60.3% identified as women, 40.2% as heterosexual) who provided a total of 1720 free-text responses. The majority, 1056 (90.8%) stated that they would notify their sexual partners and 1142 (98.2%) would want to be notified by a sexual partner of an STI risk. Qualitative analysis highlighted that respondents felt that partner notification is the responsible thing to do to look after their own and their partner's health and protect others by reducing transmission. Few stated that embarrassment and fear of repercussions may make them less likely to notify their partners or that it would depend on the type of relationship. Most preferred to notify regular partners face-to-face (941, 80.9%) and casual partners via text message (785, 67.5%). Conclusion Almost all young people want to notify and be notified by partners of an STI risk regardless of age, gender or sexual identity. Tailoring resources by communication method and partner type is one way in which practitioners and public health authorities can support young people in undertaking this important step in STI control.

Sexually Transmitted Infection Prevalence, Partner Notification, and Human Immunodeficiency Virus Risk Perception in a Cohort of Women Completing Sexually Transmitted Infection Screening as Part of a Safer Conception Study

BACKGROUND

Integrating sexually transmitted infection (STI) and preexposure prophylaxis (PrEP) care may optimize sexual and reproductive health.

METHODS

We nested an STI substudy within a human immunodeficiency virus (HIV) prevention cohort (parent study) of 18- to 35-year-old women from South Africa, planning pregnancy with a partner with HIV or of unknown serostatus. Parent-study women completed annual surveys regarding HIV-risk perceptions and were offered oral PrEP. Preexposure prophylaxis initiators completed quarterly plasma tenofovir (TFV) testing. Substudy women completed STI screening at enrollment, 6 months, onset of pregnancy, and in the third trimester via examination, vaginal swabs tested via PCR for Chlamydia trachomatis , Neisseria gonorrhoeae , Trichomonas vaginalis , Mycoplasma genitalium , and blood tested for Treponema pallidum . Follow-up was 6 months. Women with STIs were treated, offered partner notification (PN) cards, and surveyed regarding PN practices. We describe STI prevalence and incidence, and model factors associated with prevalent infection. Sexually transmitted infection substudy and parent study-only participants were matched on age and number of days on study to assess HIV-risk perception scores between the 2 groups and the proportion with detectable TFV.

RESULTS

Among 50 substudy participants, 15 (30%) had prevalent STI. All 13 completing follow-up reported PN. Most did not prefer assisted PN. Mean HIV risk perception scores and proportion with detected plasma TFV were similar across groups.

CONCLUSIONS

High STI prevalence supports the importance of laboratory screening to optimize sexual health for women planning pregnancy. Rates of self-reported PN are reassuring; low interest in assisted PN suggests the need for alternative approaches. Enhanced STI care did not affect HIV-risk perception or PrEP adherence, however both were relatively high in this cohort.

Sexual partner referral and associated factors among patients with sexually transmitted disease in Jabi Tehnan district and Finote Selam town

BACKGROUND

Partner referral (or contact tracing) is an essential approach for preventing sexually transmitted infections. Even though this approach has been used in Ethiopia, there is a scarcity of evidence in Ethiopia particularly in this study area.

METHODS

A cross-sectional study was conducted among 397 patients with curable sexually transmitted diseases. Factors associated to the practice of sexual partner referral were explored where variables having a p-value of <0.05 in multivariable analysis were considered statistically significant.

RESULT

Referrals for sexual partners were found to be 42.4% in this study (95% CI: 35.3, 45.3). Not expecting the end of the relationship among regular partnerships (AOR: 4.8; 95% CI: 1.9, 12.4), perceived risk of reinfection (AOR: 3.0; 95% CI: 1.8, 5.3), perceived self-efficacy (AOR: 3.8; 95% CI: 2.4, 6.3), intention to refer partners (AOR: 3.7; 95% CI: 2.0, 6.4), and knowledge of sexually transmitted infections (AOR: 3.0; 95% CI: 1.8, 5.0) were significantly associated with sexual partner referral.

CONCLUSIONS

This study showed that sexual partner referral was low. Perceived risks of reinfection, perceived self-efficacy, anticipating the end of a relationship, intention to refer partners, and knowledge of sexually transmitted infections were significant predictors of sexual partner referral. Intervention endeavors need to consider factors pointed out in this study to improve sexual partner referral.

"It's not safe for me and what would it achieve?" Acceptability of patient-referral partner notification for sexually transmitted infections to young people, a mixed methods study from Zimbabwe

Partner notification (PN) is considered integral to the management of sexually transmitted infections (STI). Patient-referral is a common PN strategy and relies on index cases notifying and encouraging their partners to access treatment; however, it has shown limited efficacy. We conducted a mixed methods study to understand young people's experiences of PN, particularly the risks and challenges encountered during patient-referral. All young people (16-24 years) attending a community-based sexual and reproductive health service in Zimbabwe who were diagnosed with an STI were counselled and offered PN slips, which enabled their partners to access free treatment at the service. PN slip uptake and partner treatment were recorded. Among 1807 young people (85.0% female) offered PN slips, 745 (41.2%) took up ≥1 PN slip and 103 partners (5.7%) returned for treatment. Most participants described feeling ill-equipped to counsel and persuade their partners to seek treatment. Between June and August 2021, youth researchers conducted in-depth interviews with 41 purposively selected young people diagnosed with an STI to explore their experiences of PN. PN posed considerable social risks, threatening their emotional and physical safety. Except for a minority in long-term, publicly acknowledged relationships, participants did not expect PN would achieve successful outcomes. Public health discourse, which constructs PN as "the right thing to do", influenced participants to adopt narratives that concealed the difficulties of PN and their unmet needs. Urgent interrogation is needed of whether PN is a suitable or constructive strategy to continue pursuing with young people. To improve the outcomes of preventing reinfection and onward transmission of STIs, we must consider developing alternative strategies that better align with young people's lived experiences.Plain language summary Partner notification is a public health strategy used to trace the sexual partners of people who have received a sexually transmitted infection (STI) diagnosis. It aims to interrupt the chains of STI transmission and prevent reinfection by treating both the person diagnosed and their sexual partners. The least effective but most common partner notification strategy used in many resource-limited settings is called "patient referral". This involves a sexual healthcare provider encouraging the person diagnosed to give a "partner notification slip" to their potentially exposed sexual partner/s and persuading them to access treatment. This research sought to better understand young people's experiences of partner notification, particularly the risks and challenges they faced during patient-referral.All young people (16-24 years) attending a community-based sexual and reproductive health service in Zimbabwe who were diagnosed with an STI were counselled and offered PN slips, which enabled their partners to access free treatment at the service. Young people trained as researchers interviewed 41 young people who had received a STI diagnosis to explore their experiences of partner notification.Only a small number (5.7%) of the partners of those who took a slip attended the service for treatment. Most participants felt they did not have the preparation, skills, or resources to persuade their partners to seek treatment. Many described negative experiences during and after partner notification, including relationship breakdown, reputation damage, and physical violence.These findings suggest that we should reconsider if partner notification is suitable or effective for use with young people. We should explore alternative approaches that do not present risks to young people's social, emotional, and physical safety and well-being.

Prevalence, incidence and recurrence of sexually transmitted infections in HIV-negative adult women in a rural South African setting

OBJECTIVE

Sexually transmitted infections (STIs), including syphilis, chlamydia, gonorrhoea and trichomoniasis, are of global public health concern. While STI incidence rates in sub-Saharan Africa are high, longitudinal data on incidence and recurrence of STIs are scarce, particularly in rural areas. We determined the incidence rates of curable STIs in HIV-negative women during 96 weeks in a rural South African setting.

METHODS

We prospectively followed participants enrolled in a randomised controlled trial to evaluate the safety and efficacy of a dapivirine-containing vaginal ring for HIV prevention in Limpopo province, South Africa. Participants were included if they were female, aged 18-45, sexually active, not pregnant and HIV-negative. Twelve-weekly laboratory STI testing was performed during 96 weeks of follow-up. Treatment was provided based on vaginal discharge by physical examination or after a laboratory-confirmed STI.

RESULTS

A total of 119 women were included in the study. Prevalence of one or more STIs at baseline was 35.3%. Over 182 person-years at risk (PYAR), a total of 149 incident STIs were diagnosed in 75 (65.2%) women with incidence rates of 45.6 events/PYAR for chlamydia, 27.4 events/100 PYAR for gonorrhoea and 8.2 events/100 PYAR for trichomoniasis. Forty-four women developed ≥2 incident STIs. Risk factors for incident STI were in a relationship ≤3 years (adjusted hazard ratio [aHR]: 1.86; 95% confidece interval [CI]: 1.04-2.65) and having an STI at baseline (aHR: 1.66; 95% CI: 1.17-2.96). Sensitivity and specificity of vaginal discharge for laboratory-confirmed STI were 23.6% and 87.7%, respectively.

CONCLUSION

This study demonstrates high STI incidence in HIV-negative women in rural South Africa. Sensitivity of vaginal discharge was poor and STI recurrence rates were high, highlighting the shortcomings of syndromic management in the face of asymptomatic STIs in this setting.

Factors associated with partner notification intentions among symptomatic sexually transmitted infection service attendees in South Africa

BACKGROUND

In South Africa (SA), a client-initiated partner notification (PN) approach is implemented for the management of sexual partners of patients presenting with sexually transmitted infections (STIs) or STI syndromes.

OBJECTIVES

To explore the demographic, sexual behavioural and clinical characteristics associated with PN intentions among symptomatic STI service attendees at sentinel primary healthcare facilities in three SA provinces.

METHODS

We analysed cross-sectional data obtained from 1 293 adults enrolled into STI aetiological surveillance during 2019 - 2020 in Gauteng, KwaZulu-Natal and Western Cape provinces. Self-reported sexual practices, PN intentions and clinical data were collected using nurse-administrated questionnaires. We assessed gender-stratified factors associated with the index case's willingness to notify their sexual partners of their STI syndrome diagnosis. Univariable and multivariable Poisson regression models with robust error variance were used to determine factors associated with gender-stratified PN intentions.

RESULTS

The enrolled participants comprised 887 male (68.6%) and 406 female (31.4%) STI clients. Self-reported PN intentions were higher among women than men (83.5% v. 64.4%; p<0.001). Multivariable analyses revealed that casual sex partnerships during the preceding 3-month period and enrolment at the KwaZulu-Natal site were independent barriers to PN intent among male participants. For females, enrolment at the Gauteng site was independently associated with lower PN intentions, while presenting with genital ulcer syndrome was a motivator towards PN intent. The primary reasons cited for non-disclosure across both genders were casual sexual encounters, followed by geographically distant partnerships and fear of disclosure.

CONCLUSION

We show that demographic and behavioural characteristics, as well as relationship dynamics, may influence the PN intentions of STI service attendees in SA. Alternative PN strategies should be considered, based on the reported barriers, to increase overall STI notification, strengthen partner management and ultimately reduce STI incidence.

STI prevalence, incidence, and partner notification among women in a periconception HIV prevention program in Uganda

BACKGROUND

We provided sexually transmitted infection (STI) screening and facilitated partner notification and treatment among women participating in a periconception HIV prevention program in southwestern Uganda to understand follow-up STI incidence.

METHODS

Women at-risk for HIV exposure while planning for pregnancy completed laboratory screening for chlamydia, gonorrhea, trichomoniasis, and syphilis at enrollment and 6 months of follow-up and/or incident pregnancy; facilitated partner notification and treatment were offered for those with positive tests. We performed a logistic regression to determine correlates of follow-up STI.

RESULTS

Ninety-four participants completed enrollment STI screening with a median age of 29 (IQR 26-34); 23 (24%) had ≥1 STI. Of the 23 participants with enrollment STI(s), all completed treatment and 19 (83%) returned for follow-up; 18 (78%) reported delivering partner notification cards and discussing STIs with partner(s), and 14 (61%) reported all partners received STI treatment. Of the 81 (86%) who successfully completed follow-up STI screening, 17 (21%) had ≥1 STI. The STI incidence rate was 29.0 per 100 person-years. In univariable regression analysis, enrollment STI, younger age, less education, and alcohol consumption were all significantly associated with follow-up STI.

CONCLUSIONS

We demonstrated high enrollment and follow-up STI rates and moderate participant-reported partner treatment among women planning for pregnancy in Uganda despite partner notification and treatment. Novel STI partner notification and treatment interventions are needed to decrease the STI burden, especially among women planning for and with pregnancy.

"I feel like it is asking if he is a stalker … but I also feel like it is asking if he cares": exploring young South African women and men's perceptions of the Sexual Relationship Power Scale

Background

Gender inequity and the subsequent health impacts disproportionately affect communities in the Global South. However, most gender equity measures, such as Pulerwitz’ (2000) Sexual Relationship Power Scale (SRPS), are developed and validated in the Global North and then applied in Global South settings without investigation of context applicability or validity. This study examines the SRPS’ validity evidence, comprehensiveness, and contemporary relevance for young South African women and men.

Methods

Between 2019 and 2021, 38 cognitive interviews (CIs) were conducted among previous participants of a South African youth cohort study ‘AYAZAZI’ (2015–2017) to explore youth’s perceptions of the SRPS. The SRPS measures women’s perceptions of their partner’s controlling behaviours, and men’s perceptions of their own controlling behaviours. Using CIs, participants responded to a 13-item adaptation of the SRPS for use among South African youth (strongly agree-strongly disagree), and then were asked to think-aloud their reasoning for responses, their understanding and perceived relevance of each item, and made overall suggestions for scale adaptations. An item appraisal coding process was applied, whereby Cognitive Coding assessed the types of cognitive problems youth had with understanding the items, and Question Feature Coding assessed which item features caused problems for participant understandings. Finally, youth recommendations for scale adaptations were summarized.

Results

Overall, 21 women and 17 men aged 21–30 participated in CIs in Durban and Soweto, South Africa. Cognitive Coding revealed 1. Comprehension issues, and 2. Judgements related to items’ applicability to lived experiences and identities (e.g., being unmarried). Question Feature Coding revealed items’ 1. Lack of clarity or vagueness in wording and 2. Logical problems in assumptions leading to multiple interpretations (e.g., item ‘my partner always need to know where I am’ interpreted as both controlling and caring behaviour). Multiple, overlapping issues revealed how many items failed to “fit” within the present-day living realities of South African youth. Youth recommended several item adaptations and additions, including strength-based items, to existing measures of gender equity and relationship power.

Conclusion

Given identified issues, several adaptations including revising items to be more inclusive, contemporary, context specific, relational, and strength-based are needed to validly measure gender equity and power dynamics within the relationships of South African youth.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12889-022-13686-9.

Differences in Sexual Behavior and Partner Notification for Sexually Transmitted Infections Between the Out of School Youth and University Students in a Peri-Urban District in South Africa-A Cross-Sectional Survey

The increase in sexually transmitted infections (STIs) in young people is a public health concern. Among those in university and out of school, different contextual factors contribute to their risky sexual behavior and increased susceptibility to STIs and HIV. There are limited comparative studies examining risky sexual behavior and partner notification (PN) between these two groups, particularly in South Africa. We investigated sexual behaviors, self-reported STI diagnosis, health seeking behavior, and preferred PN methods of university students and out of school youth. A descriptive cross-sectional survey was used using convenient sampling to select 917 students across five health sciences universities and through periodic sampling 699 out of school youth were selected from two main local shopping centers in South Africa. Descriptive statistics, bivariate and multivariable logistic analysis were performed using Stata IC version 14. More university students (71.7%) than out of school youth were in casual relationships (28.3%), with half of out of school youth being in steady relations (50.2%). Moreover, university students (65.7%) used a condom in the past 6 months compared to their counterparts (34.3%). Of the 124 youth who were diagnosed with STI in the past 12 months, majority (n = 106, 85%) were out of school youth. The probability of notifying a partner about a STI infection was 82% among university students compared to their counterparts (p = >0.05). The odds of notifying a partner was 1.79 times more for those having multiple sexual partners than those who had only one partner. Both groups preferred a face-to-face STI disclosure with partner; however, more university students (67%) preferred SMS notification than PN referral slips as compared to out of school youth (42%). Both the university students and the out of school youth engaged in risky sexual behaviors. Both groups preferred face-to-face and clinic SMS partner notifications, even though university students were in the majority. There is a need for developing health promotion scripts on disclosing STIs to sexual partners to empower the majority of the youth who prefer face-to-face PN over the prescribed methods.

Oral Manifestations of Syphilis: Report of Four Cases

Syphilis is an infectious disease caused by Treponema pallidum. Syphilis can present with an array of oral manifestations at different stages of disease progression. This article reports on four cases of syphilis with oral manifestations diagnosed by oral health professionals. Case 1: 18-year-old female presented with multiple ulcerations and patches involving the hard palate, uvula, retromolar area, and papillary nodules on the tongue. Case 2: 25-year-old male presented with a solitary, exophytic lesion on the anterior tongue. Case 3: 17-year-old female presented with multiple pigmented macules on the palms of hands and soles of feet, as well as multiple exophytic, sessile, soft tissue masses throughout the oral cavity. Case 4: 14-year-old female presented with a solitary, exophytic, verrucous lesion in the incisive papilla area, as well as multiple, coalescing patches involving the soft palate, uvula, and tonsillar areas. All patients were managed by biopsy and serological investigations. Treatment of syphilis was performed at infectious disease clinics with 2.4 million units (MUs) benzathine benzylpenicillin intramuscular (IM) weekly. Oral health professionals need to have knowledge of the oral manifestations of syphilis to ensure that patients are accurately identified and appropriately treated.

Pilot implementation of a user-driven, web-based application designed to improve sexual health knowledge and communication among young Zambians: a mixed method study (Preprint)

Background

Digital health interventions show promise in improving the uptake of HIV services among adolescents and young people aged 15 to 24 years in sub-Saharan Africa.

Objective

This study aimed to pilot-test a theory-based, empirically grounded web-based application designed to increase condom-related knowledge, sexual and reproductive health (SRH) communication, and healthier choices among young Zambians.

Methods

We conducted a pre-post quasi-experimental evaluation of the user-driven Be in the Know Zambia (BITKZ) web application using web-based surveys and in-depth interviews (IDIs) on the phone. We enrolled participants using social media advertisements. Our final analysis set comprised 46.04% (749/1627) of participants in the intervention group (which received the BITKZ link) and 53.96% (878/1627) of participants in the comparison group (no intervention). We collected survey data at study enrollment (baseline) and 5 weeks after the first enrollment in each group. Approximately 85% (637/749) of BITKZ users completed a user survey, of whom 9.3% (59/637) participated in IDIs. We calculated the time interfacing with BITKZ using the application log files. We conducted descriptive analyses to describe baseline characteristics and the user experience. At the endline, we assessed association using a t test and adjusted logistic regression for binary outcomes and ordinal regression for ordered outcomes, conditioning on age, sex, marital status, and employment status. We used adjusted average treatment effects (aATE) to assess the effects of BITKZ intervention. We conducted rapid matrix analyses of IDI transcripts in Microsoft Excel, sorting the data by theme, gender, and experience rating.

Results

Users rated BITKZ highly (excellent: 352/609, 57.8%; good: 218/609, 35.8%). At the endline, the intervention group had a higher level of knowledge related to condoms (adjusted odds ratio [aOR]: 1.35, 95% CI 1.06-1.69) and on wearing condoms correctly (aOR: 1.23, 95% CI 1.02-1.49). Those who had full-time employment had increased odds of knowing how to wear condoms correctly (aOR: 1.67, 95% CI 1.06-2.63) compared with those who reported being unemployed, as did men when compared with women (aOR: 1.92, 95% CI 1.59-2.31). Those in the intervention group were more likely to score higher for intention to test for sexually transmitted infections (STIs; aATE 0.21; P=.01) and HIV (aATE 0.32; P=.05), as well as for resisting peer pressure (aATE 2.64; P=.02). IDIs corroborated increased knowledge on correct condom use among men and female condoms among women, awareness of STIs and testing, and resistance to peer pressure. Interviewees provided examples of more open SRH communication with partners and peers and of considering, adopting, and influencing others to adopt healthier behaviors.

Conclusions

Despite the high baseline awareness of SRH among Zambian adolescents and young people with internet access, BITKZ provided modest gains in condom-related knowledge, resistance to peer pressure, and intention to test for STIs and HIV.

A review on Trichomonas vaginalis infections in women from Africa

Background

Trichomoniasis is the most common sexually transmitted infection (STI) with an estimated annual incidence of 276.4 million cases globally and about 30 million cases in sub-Saharan Africa. Trichomoniasis has been found to be associated with various health complications including pelvic inflammatory disease (PID), significant pregnancy complications, cervical cancer, prostatitis, infertility and the acquisition of human immunodeficiency virus (HIV).

Aim

Despite being a highly prevalent infection in the African continent, there is no review article published that solely focusses on Trichomonas vaginalis (T. vaginalis) infections in women from Africa. This review aims to fill this gap in the literature.

Method

An electronic search of online databases was used to identify and extract relevant research articles related to the epidemiology, health complications and treatment associated with T. vaginalis in women from Africa.

Results

Within the African continent, South Africa has reported the highest prevalence rate for this infection. A combination of sociodemographic, behavioural and biological factors has been shown to be associated with infection. Trichomonas vaginalis infection is associated with the acquisition of HIV, cervical cancer and PIDs in various female populations across the continent. Emerging patterns of resistance to metronidazole have been reported in women from South Africa. Currently, there is no effective vaccine against this pathogen despite efforts at vaccine development.

Conclusion

Based on the high prevalence and health consequences associated with T. vaginalis, there is a need for improved screening programmes that will lead to early diagnosis, detection of asymptomatic infections and effective treatment regimens.

Sexually transmitted infections and prior antibiotic use as important causes for negative urine cultures among adults presenting with urinary tract infection symptoms to primary care clinics in Zimbabwe: a cross-sectional study

OBJECTIVE

Urinary tract infections (UTIs) are common in primary care. The yield of urine cultures in patients with UTI symptoms can be considerably different between high-income and low-income settings. This study aimed to explore possible causes of negative urine cultures in patients presenting with symptoms of UTI to primary health clinics in Harare.

DESIGN

Cross-sectional study.

SETTING

Nine primary health clinics in Harare, Zimbabwe.

PARTICIPANTS

Adults presenting with symptoms of UTIs between March and July 2020.

PRIMARY OUTCOME MEASURES

Urine samples underwent dipstick testing, microscopy, culture, and testing for sexually transmitted infections (STIs) using GeneXpert and for the presence of antibiotic residues using an antibiotic bioassay. The primary outcomes were the number and proportion of participants with evidence of STIs, prior antibiotic exposure, leucocyturia and UTIs.

RESULTS

The study included 425 participants with a median age of 37.3 years, of whom 275 (64.7%) were women. Leucocyturia was detected in 130 (30.6%, 95% CI 26.2% to 35.2%) participants, and 96 (22.6%, 95% CI 18.7% to 26.9%) had a positive urine culture for a uropathogen. Chlamydia trachomatis, Neisseria gonorrhoeae and Trichomonas vaginalis were detected in 43/425 (10.1%, 95% CI 7.4% to 13.4%), 37/425 (8.7%, 95% CI 6.2% to 11.8%) and 14/175 (8.0%, 95% CI 4.4% to 13.1%) participants, respectively. Overall, 89 (20.9%, 95% CI 17.2% to 25.1%) participants reported either having taken prior antibiotics or having had a positive urine bioassay. In 170 (40.0%, 95% CI 35.3% to 44.8%) participants, all of the tests that were performed were negative.

CONCLUSIONS

This study found a high prevalence of STIs and evidence of prior antimicrobial use as possible explanations for the low proportion of positive urine cultures.

Gender and Power Dynamics of Social Relationships Shape Willingness to Participate in Biomedical HIV Prevention Research Among South African Adolescents and Young Adults

Background: Understanding young women and men's perceived barriers and facilitators to participation in biomedical HIV prevention research is important for designing youth friendly services (YFS) and acceptable technologies, which are necessary for preventing high sustained HIV incidence in South Africa. This study explores the multileveled barriers and facilitators to young men and women's willingness to participate in hypothetical biomedical HIV prevention research. Methods: Eight age- (16-18 and 19-24 years) and gender-stratified focus group discussions (FGDs) were conducted using semi-structured interview guides to explore young South African women and men's willingness, perceived barriers, and facilitators to participating in biomedical HIV prevention research. FGD transcripts were uploaded to NVivo and coded collaboratively with youth study team members. Thematic analysis using Bronfenbrenner's ecological model (individual, inter-personal, community, and societal) was used to guide a deductive coding procedure, which was documented and compared by gender. Results: Thirty-one participants from Durban and 34 from Soweto participated in FGDs. Individual facilitators for participation were discussed more by young men and included financial incentives and altruism. Concerns about side-effects of biomedical products were a common barrier. Interpersonal relationships with peers, intimate partners and caregivers influenced young people's willingness to participate in HIV prevention research, more so among young women. For young women, gendered power dynamics and distrust of intimate partners and parents influenced both communication regarding participation and willingness to participate in research that is often stigmatized, due to societal norms around women's sexuality. On a societal level, participants expressed distrust in medical and research institutions, however a sense of community that was developed with the study staff of this project, was a motivator to participate in future studies. Discussion: At each level of the ecological model, we found participants expressed gendered barriers and facilitators for participation. Gender norms as well as distrust of partners, parents, and health care professionals were key barriers that cut across all levels. At each level participants discussed facilitators that were youth-engaged, underscoring the need to implement YFS, establish trust and address gender inequities within future biomedical HIV prevention studies wishing to engage and retain South African youth.

Extracellular vesicles of bacteria as potential targets for immune interventions

Bacterial infection is one of the most common and serious diseases. Extracellular vesicles (EVs) expressed by bacterial cells during infection and their biological functions have been a growing field in recent years. The study of the immune interaction mechanism between EVs and bacteria has become more significant. EVs are released into the extracellular microenvironment during bacterial infection. EVs carry various lipids, proteins, nucleic acids, and other substances of host bacteria and participate in various physiological and pathological processes. EV-based vaccines against bacterial infection are also being evaluated. This review focuses on the biological characteristics of EVs, the interaction between EVs and the host immune system, and the potential of EVs as new vaccines. A deeper understanding of the interaction between EVs and the immune system informs on the biological function and heterogeneity of EVs. This knowledge also can facilitate the development and application of EVs and their potential as vaccines.