Incidence of curable sexually transmissible infections among adolescents and young adults in remote Australian Aboriginal communities: analysis of longitudinal clinical service data

Chlamydia and gonorrhoea testing and positivity within an urban Aboriginal and Torres Strait Islander Community Controlled Health Service 2016-2021

Background This study describes chlamydia and gonorrhoea testing, positivity, treatment, and retesting among individuals aged ≥15years attending an urban Aboriginal Community Controlled Health Service during the period 2016-2021. Method Utilising routinely collected clinical data from the ATLAS program (a national sentinel surveillance network), a retrospective time series analysis was performed. The study assessed testing rates, positivity, treatment efficacy, retesting and trends over time within an urban Aboriginal Community Controlled Health Service. Results Testing rates for chlamydia and gonorrhoea varied between 10 and 30% over the study period, and were higher among clients aged 15-29years and among females. Positivity rates for both infections varied by age, with clients aged 15-24years having higher positivity than older clients. Gonorrhoea positivity rates decreased after 2016. Treatment and retesting practices also showed sex disparities, with men having a slightly higher treatment rate within 7days, whereas females had significantly higher retesting rates within 2-4months, indicating differences in follow-up care between sexes. Conclusion The study emphasises the need for clinical and public health interventions within urban Aboriginal and Torres Strait Islander populations to further reduce chlamydia and gonorrhoea. Prioritising improved access to testing, timely treatment and consistent retesting can significantly contribute to lowering STI prevalence and enhancing sexual health outcomes in these communities.

Our relationships, our values, our culture - Aboriginal young men's perspectives about sex, relationships and gender stereotypes in Australia

Studies of Aboriginal young people have often followed a deficit approach depicting them as 'risky' and in need of help. In contrast, this study took a strengths-based approach and focussed on what Aboriginal young people value, how they stay safe and how their culture impacts their lives. 16 Aboriginal men aged 16 to 24 years were interviewed in Sydney, Australia. We examined Aboriginal young men's perspectives about relationships, sex and gender. Interviews were conducted by young Aboriginal men in 2019 and 2020. Overall, four features of positive sexual and romantic relationships were discussed: (1) love, connection and support; (2) enjoyment and fun; (3) responsibility, safety and consent; and 4) honesty, respect and trust. Additionally, three topics related to gender roles: (1) becoming a man; (2) sex as a masculine achievement; and (3) inequality and gender stereotypes. Our study suggests that Aboriginal young men are exploring sexual and romantic relationships, and although they value enjoyment and fun, they are aware of broader issues such as consent and respect. The young men acknowledged gender stereotypes faced by young women. Our results could be used by future school safe sex education programmes to better meet the needs of Aboriginal young men.

Using Genomics to Understand the Epidemiology of Infectious Diseases in the Northern Territory of Australia

The Northern Territory (NT) is a geographically remote region of northern and central Australia. Approximately a third of the population are First Nations Australians, many of whom live in remote regions. Due to the physical environment and climate, and scale of social inequity, the rates of many infectious diseases are the highest nationally. Molecular typing and genomic sequencing in research and public health have provided considerable new knowledge on the epidemiology of infectious diseases in the NT. We review the applications of genomic sequencing technology for molecular typing, identification of transmission clusters, phylogenomics, antimicrobial resistance prediction, and pathogen detection. We provide examples where these methodologies have been applied to infectious diseases in the NT and discuss the next steps in public health implementation of this technology.

Hospitalisations for pelvic inflammatory disease in young Aboriginal women living in remote Australia: the role of chlamydia and gonorrhoea

OBJECTIVE

Aboriginal women living in remote Australia experience a high burden of both chlamydia and gonorrhoea infections and disproportionately high rates of pelvic inflammatory disease (PID). We estimated for the first time the fraction of PID attributable to these infections in young Aboriginal women living in these settings.

METHODS

Using published data from two large Australian studies (2002-2013; 2010-2014), we calculated the fraction of emergency department presentations and hospitalisations for PID attributable to chlamydia and/or gonorrhoea infection in Aboriginal women aged 16-29 years living in remote Australia. We used a Monte Carlo simulation to estimate the mean and 95% CIs for the assumed prevalence and population attributable fractions for PID for infection stratifications (chlamydia only, gonorrhoea only and dual infection) as well as for any infection (chlamydia and/or gonorrhoea). Additional outputs were calculated for chlamydia infection with/without gonorrhoea coinfection, and vice versa.

RESULTS

The prevalence of chlamydia only was 12.9% (95% CI: 11.6% to 14.2%), gonorrhoea only was 7.8% (95% CI: 6.6% to 8.9%) and dual infection was 6.5% (95% CI: 5.8% to 7.2%); rate ratios of PID were 1.9 (95% CI: 1.5 to 2.3), 5.2 (95% CI: 4.3 to 6.4) and 4.6 (95% CI: 3.8 to 5.5), respectively. The overall fraction of PID attributable to chlamydia and/or gonorrhoea was 40.2% (95% CI: 36.0% to 44.4%); any gonorrhoea was 33.4% (95% CI: 29.2% to 37.8%) and any chlamydia was 20.6% (95% CI: 16.9% to 24.6%).

CONCLUSION

Our study demonstrates the importance of calculating the fraction of PID related to chlamydia and gonorrhoea in the local context, demonstrating the major contribution gonorrhoea makes to PID hospitalisations among Australian Aboriginal women living in remote settings. To significantly and sustainably reduce the unacceptable rate of PID in this population, strategies are urgently needed to improve timely testing and treatment and recognition and management of PID in primary care.

Seroepidemiology of Chlamydia trachomatis Infection in the General Population of Northern China: The Jidong Community Cohort Study

A longitudinal serological study to investigate the seropositive frequency, incidence, and antibody dynamics of Chlamydia trachomatis infection in the general population of China is urgently needed in order to optimize the strategies for surveillance and precise prevention of C. trachomatis infection. This longitudinal study enrolled 744 subjects aged 18-65 years from Jidong Community of Northern China from 2014 to 2018. Seropositive frequency, incidence, and reinfection of C. trachomatis were determined by detecting antibody against C. trachomatis Pgp3 using "in-house" luciferase immunosorbent assay (LISA). The dynamic of anti-Pgp3 antibody was analyzed using the Generalized Estimating Equation (GEE) model. The overall Pgp3 seropositive frequency among the 18-65-year-old population was 28.1% (95% CI 24.9-31.5), and significantly increased from 12.0% in those aged 18-29 years to 48.6% in the 60-65 years old. The seropositive frequency was slightly higher in women than in men (31.3% vs. 25.4%) without statistical significance. The C. trachomatis incidence and reinfection rate were 11 and 14 per 1,000 person-years, respectively, and showed no significant difference with respect to age, gender, ethnicity, marital status, and education levels. Furthermore, anti-Pgp3 antibody remained detectable in 93.3% (195/209) of the seropositive subjects during the 5 years of follow-up. The overall decay rate for anti-Pgp3 antibody for CT-infected persons was -0.123 Log2 RLU/year, which was dramatically slower than in CT new infection (-3.34 Log2 RLU/year) or reinfection (-1.1 Log2 RLU/year). In conclusion, at least one quarter of the people aged 18-65 years have been infected with C. trachomatis over their lifetime while all age groups are susceptible to C. trachomatis infection in the community of Northern China. Therefore, comprehensive prevention strategies are urgently needed.

Toward incorporating epigenetics into regulation of gene expression in the parasite Trichomonas vaginalis

Trichomonas vaginalis is an extracellular parasite that colonizes the human urogenital tract, causing a highly prevalent sexually transmitted infection. The parasite must change its transcriptional profile in order to establish and maintain infection. However, few core regulatory elements and transcription factors have been identified to date and little is known about other mechanisms that may control these rapid changes in gene expression during parasite infection. In the last years, epigenetic mechanisms involved in the regulation of gene expression have been gaining major attention in this parasite. In this review, we summarize and discuss the major advances of the last few years with regard to epigenetics (DNA methylation, post-translational histone modifications, and histone variants) in the parasite T. vaginalis. These studies can shed light into our current understanding of this parasite's biology with far-reaching implications for the prognosis and treatment of trichomoniasis.

Young Aboriginal people's sexual health risk reduction strategies: a qualitative study in remote Australia

Background Surveillance data indicate that Aboriginal and Torres Strait Islander young people are more likely than their non-Indigenous counterparts to experience sexually transmissible infections (STIs) and teenage pregnancy. Despite increasing emphasis on the need for strengths-based approaches to Aboriginal sexual health, limited published data document how young Aboriginal people reduce sexual health risks encountered in their everyday lives.

METHODS

In-depth interviews with 35 young Aboriginal women and men aged 16-21 years in two remote Australian settings were conducted; inductive thematic analysis examining sexual health risk reduction practices was also conducted.

RESULTS

Participants reported individual and collective STI and pregnancy risk reduction strategies. Individual practices included accessing and carrying condoms; having a regular casual sexual partner; being in a long-term trusting relationship; using long-acting reversible contraception; having fewer sexual partners; abstaining from sex; accessing STI testing. More collective strategies included: refusing sex without a condom; accompanied health clinic visits with a trusted individual; encouraging friends to use condoms and go for STI testing; providing friends with condoms.

CONCLUSION

Findings broaden understanding of young Aboriginal people's sexual health risk reduction strategies in remote Aboriginal communities. Findings signal the need for multisectoral STI prevention and sexual health programs driven by young people's existing harm minimisation strategies and cultural models of collective support. Specific strategies to enhance young people's sexual health include: peer condom distribution; accompanied health service visits; peer-led health promotion; continued community-based condom distribution; enhanced access to a fuller range of available contraception in primary care settings; engaging health service-experienced young people as 'youth health workers'.

Adenine DNA methylation, 3D genome organization, and gene expression in the parasite Trichomonas vaginalis

Trichomonas vaginalis is a common sexually transmitted parasite that colonizes the human urogenital tract causing infections that range from asymptomatic to highly inflammatory. Recent works have highlighted the importance of histone modifications in the regulation of transcription and parasite pathogenesis. However, the nature of DNA methylation in the parasite remains unexplored. Using a combination of immunological techniques and ultrahigh-performance liquid chromatography (UHPLC), we analyzed the abundance of DNA methylation in strains with differential pathogenicity demonstrating that N6-methyladenine (6mA), and not 5-methylcytosine (5mC), is the main DNA methylation mark in T. vaginalis Genome-wide distribution of 6mA reveals that this mark is enriched at intergenic regions, with a preference for certain superfamilies of DNA transposable elements. We show that 6mA in T. vaginalis is associated with silencing when present on genes. Interestingly, bioinformatics analysis revealed the presence of transcriptionally active or repressive intervals flanked by 6mA-enriched regions, and results from chromatin conformation capture (3C) experiments suggest these 6mA flanked regions are in close spatial proximity. These associations were disrupted when parasites were treated with the demethylation activator ascorbic acid. This finding revealed a role for 6mA in modulating three-dimensional (3D) chromatin structure and gene expression in this divergent member of the Excavata.

Young Aboriginal people's engagement with STI testing in the Northern Territory, Australia

BACKGROUND

Australian surveillance data document higher rates of sexually transmissible infections (STIs) among young Aboriginal people (15-29 years) in remote settings than non-Aboriginal young people. Epidemiological data indicate a substantial number of young Aboriginal people do not test for STIs. Rigorous qualitative research can enhance understanding of these findings. This paper documents socio-ecological factors influencing young Aboriginal people's engagement with clinic-based STI testing in two remote settings in the Northern Territory, Australia.

METHODS

In-depth interviews with 35 young Aboriginal men and women aged 16-21 years; thematic analysis examining their perceptions and personal experiences of access to clinic-based STI testing.

RESULTS

Findings reveal individual, social and health service level influences on willingness to undertake clinic-based STI testing. Individual level barriers included limited knowledge about asymptomatic STIs, attitudinal barriers against testing for symptomatic STIs, and lack of skills to communicate about STIs with health service staff. Social influences both promoted and inhibited STI testing. In setting 1, local social networks enabled intergenerational learning about sexual health and facilitated accompanied visits to health clinics for young women. In setting 2, however, social connectedness inhibited access to STI testing services. Being seen at clinics was perceived to lead to stigmatisation among peers and fear of reputational damage due to STI-related rumours. Modalities of health service provision both enhanced and inhibited STI testing. In setting 1, outreach strategies by male health workers provided young Aboriginal men with opportunities to learn about sexual health, initiate trusting relationships with clinic staff, and gain access to clinics. In setting 2, barriers were created by the location and visibility of the clinic, appointment procedures, waiting rooms and waiting times. Where inhibitive factors at the individual, social and health service levels exist, young Aboriginal people reported more limited access to STI testing.

CONCLUSIONS

This is the first socio-ecological analysis of factors influencing young Aboriginal people's willingness to undertake testing for STIs within clinics in Australia. Strategies to improve uptake of STI testing must tackle the overlapping social and health service factors that discourage young people from seeking sexual health support. Much can be learned from young people's lived sexual health experiences and family- and community-based health promotion practices.

Analysis of diagnostic data for sexually transmissible infections in South Australian Aboriginal Community Controlled Health Services (2008-16)

Australian Aboriginal communities experience a high burden of sexually transmissible infections (STIs). Since 2009, a comprehensive sexual health program has been implemented at nine Aboriginal Community Controlled Health Services in South Australia. This study assessed trends in STI testing and positivity using deidentified diagnostic data from this period (2008-16).

METHODS

Testing data for Chlamydia trachomatis (CT), Neisseria gonorrhoeae (NG) and Trichomonas vaginalis (TV) from one urban, three regional and five remote Aboriginal health services were analysed using logistic regression.

RESULTS

From 2008 to 2016, testing increased for CT (twofold), NG (threefold) and TV (sixfold). On average, 30% of testing occurred during an annual 6-week screen. Fewer males were tested (range 27-38% annually). Mean annual STI testing coverage was 28% for 16- to 30-year-old clients attending regional or remote services (2013-16). Positivity at first testing episode for all three infections declined during the study period. From 2013 to 2016, when testing was stable and changes in positivity were more likely to indicate changes in prevalence, there were significant reductions in CT positivity (adjusted odds ratio (aOR) 0.4; 95% confidence interval (CI) 0.2-0.5) and TV positivity (aOR 0.6, 95% CI 0.4-0.9), although declines were statistically significant for females only. There was no significant decrease in NG positivity (aOR 0.9; 95% CI 0.5-1.5).

CONCLUSIONS

Since the sexual health program began, STI testing increased and STI positivity declined, but significant reductions observed in CT and TV positivity were confined to females. These findings suggest evidence of benefit from sustained, comprehensive sexual health programs in Aboriginal communities with a high STI prevalence, but highlight the need to increase STI testing among men in these communities.

Strategies to improve control of sexually transmissible infections in remote Australian Aboriginal communities: a stepped-wedge, cluster-randomised trial

BACKGROUND

Remote Australian Aboriginal communities have among the highest diagnosed rates of sexually transmissible infections (STIs) in the world. We did a trial to assess whether continuous improvement strategies related to sexual health could reduce infection rates.

METHODS

In this stepped-wedge, cluster-randomised trial (STIs in remote communities: improved and enhanced primary health care [STRIVE]), we recruited primary health-care centres serving Aboriginal communities in remote areas of Australia. Communities were eligible to participate if they were classified as very remote, had a population predominantly of Aboriginal people, and only had one primary health-care centre serving the population. The health-care centres were grouped into clusters on the basis of geographical proximity to each other, population size, and Aboriginal cultural ties including language connections. Clusters were randomly assigned into three blocks (year 1, year 2, and year 3 clusters) using a computer-generated randomisation algorithm, with minimisation to balance geographical region, population size, and baseline STI testing level. Each year for 3 years, one block of clusters was transitioned into the intervention phase, while those not transitioned continued usual care (control clusters). The intervention phase comprised cycles of reviewing clinical data and modifying systems to support improved STI clinical practice. All investigators and participants were unmasked to the intervention. Primary endpoints were community prevalence and testing coverage in residents aged 16-34 years for Chlamydia trachomatis, Neisseria gonorrhoeae, and Trichomonas vaginalis. We used Poisson regression analyses on the final dataset and compared STI prevalences and testing coverage between control and intervention clusters. All analyses were by intention to treat and models were adjusted for time as an independent covariate in overall analyses. This study was registered with the Australia and New Zealand Clinical Trials Registry, ACTRN12610000358044.

FINDINGS

Between April, 2010, and April, 2011, we recruited 68 primary care centres and grouped them into 24 clusters, which were randomly assigned into year 1 clusters (estimated population aged 16-34 years, n=11 286), year 2 clusters (n=10 288), or year 3 clusters (n=13 304). One primary health-care centre withdrew from the study due to restricted capacity to participate. We detected no difference in the relative prevalence of STIs between intervention and control clusters (adjusted relative risk [RR] 0·97, 95% CI 0·84-1·12; p=0·66). However, testing coverage was substantially higher in intervention clusters (22%) than in control clusters (16%; RR 1·38; 95% CI 1·15-1·65; p=0·0006).

INTERPRETATION

Our intervention increased STI testing coverage but did not have an effect on prevalence. Additional interventions that will provide increased access to both testing and treatment are required to reduce persistently high prevalences of STIs in remote communities.

FUNDING

Australian National Health and Medical Research Council.

Qualitative perspectives on the sustainability of sexual health continuous quality improvement in clinics serving remote Aboriginal communities in Australia

OBJECTIVES

To examine barriers and facilitators to sustaining a sexual health continuous quality improvement (CQI) programme in clinics serving remote Aboriginal communities in Australia.

DESIGN

Qualitative study.

SETTING

Primary health care services serving remote Aboriginal communities in the Northern Territory, Australia.

PARTICIPANTS

Seven of the 11 regional sexual health coordinators responsible for supporting the Northern Territory Government Remote Sexual Health Program.

METHODS

Semi-structured in-depth interviews conducted in person or by telephone; data were analysed using an inductive and deductive thematic approach.

RESULTS

Despite uniform availability of CQI tools and activities, sexual health CQI implementation varied across the Northern Territory. Participant narratives identified five factors enhancing the uptake and sustainability of sexual health CQI. At clinic level, these included adaptation of existing CQI tools for use in specific clinic contexts and risk environments (eg, a syphilis outbreak), local ownership of CQI processes and management support for CQI. At a regional level, factors included the positive framing of CQI as a tool to identify and act on areas for improvement, and regional facilitation of clinic level CQI activities. Three barriers were identified, including the significant workload associated with acute and chronic care in Aboriginal primary care services, high staff turnover and lack of Aboriginal staff. Considerations affecting the future sustainability of sexual health CQI included the need to reduce the burden on clinics from multiple CQI programmes, the contribution of regional sexual health coordinators and support structures, and access to and use of high-quality information systems.

CONCLUSIONS

This study contributes to the growing evidence on how CQI approaches may improve sexual health in remote Australian Aboriginal communities. Enhancing sustainability of sexual health CQI in this context will require ongoing regional facilitation, efforts to build local ownership of CQI processes and management of competing demands on health service staff.

Community and clinic-based screening for curable sexually transmissible infections in a high prevalence setting in Australia: a retrospective longitudinal analysis of clinical service data from 2006 to 2009

Background In response to the high prevalence of sexually transmissible infections (STIs) in many central Australian Aboriginal communities, a community-wide screening program was implemented to supplement routine primary health care (PHC) clinic testing. The uptake and outcomes of these two approaches were compared.

METHODS

Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NG) community and clinic screening data for Aboriginal people aged 15-34 years, 2006-2009, were used. Regression analyses assessed predictors of the first test occurring in the community screen, positivity and repeat testing.

RESULTS

A total of 2792 individuals had 9402 tests (median: four per person) over 4 years. Approximately half of the individuals (54%) were tested in the community and clinic approaches combined, 29% (n=806) in the community screen only and 18% (n=490) in the clinic only. Having the first test in a community screen was associated with being male and being aged 15-19 years. There was no difference between community and clinic approaches in CT or NG positivity at first test. More than half (55%) of individuals had a repeat test within 2-15 months and of these, 52% accessed different approaches at each test. The only independent predictor of repeat testing was being 15-19 years.

CONCLUSIONS

STI screening is an important PHC activity and the findings highlight the need for further support for clinics to reach young people. The community screen approach was shown to be a useful complementary approach; however, cost and sustainability need to be considered.

Molecular test for chlamydia and gonorrhoea used at point of care in remote primary healthcare settings: a diagnostic test evaluation

OBJECTIVES

A new molecular test for Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NG) (GeneXpert CT/NG) has been demonstrated to be as accurate as conventional nucleic acid amplification tests (NAAT), but performance has not been evaluated in routine primary care, performed at the point of care by clinicians. We aimed to examine its diagnostic performance when used by clinicians in remote community health services in Australia with high prevalences of CT and NG infection. The trial was registered with the Australian and New Zealand Clinical Trials Registry (#12613000808741) METHODS: At 12 health services, training was provided to 99 clinicians in the use of the GeneXpert CT/NG assay who tested specimens from all patients undergoing STI screening. Specimens were also sent in parallel for conventional laboratory-based NAATs and the concordance of results was evaluated.

RESULTS

Clinicians conducted 2486 tests: CT concordance was 99.4% (95% CI 99.1 to 99.7) with a positive concordance of 98.6% (95% CI 95.9 to 99.7) and negative concordance of 99.5% (95% CI 99.1 to 99.8); NG concordance was 99.9% (95% CI 99.7 to 100.0) with a positive concordance of 100.0% (95% CI 97.5 to 100.0) and negative concordance of 99.9% (95% CI 99.7 to 100.0).

CONCLUSIONS

In this first study reporting routine point-of-care use of GeneXpert CT/NG by primary care clinicians, we found excellent concordance with conventional NAATs. The use of the GeneXpert CT/NG at the point of care could potentially transform management and control of these infections in many endemic settings, including low/middle-income countries.

Wide variation in sexually transmitted infection testing and counselling at Aboriginal primary health care centres in Australia: analysis of longitudinal continuous quality improvement data

BACKGROUND

Chlamydia, gonorrhoea and syphilis are readily treatable sexually transmitted infections (STIs) which continue to occur at high rates in Australia, particularly among Aboriginal Australians. This study aimed to: explore the extent of variation in delivery of recommended STI screening investigations and counselling within Aboriginal primary health care (PHC) centres; identify the factors associated with variation in screening practices; and determine if provision of STI testing and counselling increased with participation in continuous quality improvement (CQI).

METHODS

Preventive health audits (n = 16,086) were conducted at 137 Aboriginal PHC centres participating in the Audit and Best Practice for Chronic Disease Program, 2005-2014. STI testing and counselling data were analysed to determine levels of variation in chlamydia, syphilis and gonorrhoea testing and sexual health discussions. Multilevel logistic regression was used to determine factors associated with higher levels of STI-related service delivery and to quantify variation attributable to health centre and client characteristics.

RESULTS

Significant variation in STI testing and counselling exists among Aboriginal PHC centres with health centre factors accounting for 43% of variation between health centres and jurisdictions. Health centre factors independently associated with higher levels of STI testing and counselling included provision of an adult health check (odds ratio (OR) 3.40; 95% Confidence Interval (CI) 3.07-3.77) and having conducted 1-2 cycles of CQI (OR 1.34; 95% CI 1.16-1.55). Client factors associated with higher levels of STI testing and counselling were being female (OR 1.45; 95% CI 1.33-1.57), Aboriginal (OR 1.46; 95% CI 1.15-1.84) and aged 20-24 years (OR 3.84; 95% CI 3.07-4.80). For females, having a Pap smear test was also associated with STI testing and counselling (OR 4.39; 95% CI 3.84-5.03). There was no clear association between CQI experience beyond two CQI cycles and higher levels of documented delivery of STI testing and counselling services.

CONCLUSIONS

A number of Aboriginal PHC centres are achieving high rates of STI testing and counselling, while a significant number are not. STI-related service delivery could be substantially improved through focussed efforts to support health centres with relatively lower documented evidence of adherence to best practice guidelines.

High chlamydia and gonorrhoea repeat positivity in remote Aboriginal communities 2009-2011: longitudinal analysis of testing for re-infection at 3 months suggests the need for more frequent screening

Background Extremely high rates of diagnosis of Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NG) have been recorded in remote communities across northern and central Australia. Re-testing at 3 months, after treatment administered, of CT or NG is recommended to detect repeat infections and prevent morbidity and ongoing transmission.

METHODS

Baseline CT and NG laboratory data (2009-2010) from 65 remote health services participating in a cluster randomised trial was used to calculate the proportion of individuals re-tested after an initial CT or NG diagnosis at <2 months (not recommended), 2-4 months (recommended) and 5-12 months and the proportion with repeat positivity on re-test. To assess if there were difference in re-testing and repeat positivity by age group and sex, t-tests were used.

RESULTS

There was a total of 2054 people diagnosed with CT and/or NG in the study period; 14.9% were re-tested at 2-4 months, 26.9% at 5-12 months, a total of 41.8% overall. Re-testing was higher in females than in males in both the 2-4-month (16.9% v. 11.5%, P<0.01) and 5-12-month (28.9% v. 23.5%, P=0.01) periods. Women aged 25-29 years had a significantly higher level of re-testing 5-12 months post-diagnosis than females aged 16-19 years (39.8% v. 25.4%, P<0.01). There was a total of 858 people re-tested at 2-12 months and repeat positivity was 26.7%. There was higher repeat NG positivity than repeat CT positivity (28.8% v. 18.1%, P<0.01).

CONCLUSIONS

Just under half the individuals diagnosed with CT or NG were re-tested at 2-12 months post-diagnosis; however, only 15% were re-tested in the recommended time period of 2-4 months. The higher NG repeat positivity compared with CT is important, as repeat NG infections have been associated with higher risk of pelvic inflammatory disease-related hospitalisation. Findings have implications for clinical practice in remote community settings and will inform ongoing sexual health quality improvement programs in remote community clinics.

The Molecular Epidemiology and Antimicrobial Resistance of Neisseria gonorrhoeae in Australia: A Nationwide Cross-Sectional Study, 2012

BACKGROUND

 Antimicrobial resistance (AMR) by Neisseria gonorrhoeae is considered a serious global threat.

METHODS

 In this nationwide study, we used MassARRAY iPLEX genotyping technology to examine the epidemiology of N. gonorrhoeae and associated AMR in the Australian population. All available N. gonorrhoeae isolates (n = 2452) received from Australian reference laboratories from January to June 2012 were included in the study. Genotypic data were combined with phenotypic AMR information to define strain types.

RESULTS

 A total of 270 distinct strain types were observed. The 40 most common strain types accounted for over 80% of isolates, and the 10 most common strain types accounted for almost half of all isolates. The high male to female ratios (>94% male) suggested that at least 22 of the top 40 strain types were primarily circulating within networks of men who have sex with men (MSM). Particular strain types were also concentrated among females: two strain types accounted for 37.5% of all isolates from females. Isolates harbouring the mosaic penicillin binding protein 2 (PBP2)-considered a key mechanism for cephalosporin resistance-comprised 8.9% of all N. gonorrhoeae isolates and were primarily observed in males (95%).

CONCLUSIONS

 This large scale epidemiological investigation demonstrated that N. gonorrhoeae infections are dominated by relatively few strain types. The commonest strain types were concentrated in MSM in urban areas and Indigenous heterosexuals in remote areas, and we were able to confirm a resurgent epidemic in heterosexual networks in urban areas. The prevalence of mosaic PBP2 harboring N. gonorrhoeae strains highlight the ability for new N. gonorrhoeae strains to spread and become established across populations.

Low HIV testing rates among people with a sexually transmissible infection diagnosis in remote Aboriginal communities

OBJECTIVE

To determine the rates of HIV testing among people who had received positive test results for chlamydia, gonorrhoea and trichomoniasis, or who had been tested for syphilis.

DESIGN, SETTING AND PARTICIPANTS

Pathology data for the period January 2010 - December 2014 from 65 remote Aboriginal communities participating in the STRIVE trial of sexually transmissible infection (STI) control were analysed.

MAIN OUTCOME MEASURES

Rates of HIV testing within 30 and 90 days of an STI test (for chlamydia, gonorrhoea or trichomoniasis), the result of which was positive, and within 30 days of a test for syphilis; factors independently associated with concurrent HIV testing.

RESULTS

31.8% of 15 260 positive STI test results were linked with an HIV test within 30 days of the test (including 5.6% not on the same day), and 34.8% within 90 days; 44.1% were linked with syphilis testing within 30 days. 53.4% of all those tested for syphilis were also tested for HIV within 30 days. Multivariate analysis found that HIV testing was more likely for men, in geographical regions 3 and 4, in association with positive STI test results during 2012, 2013 or 2014 (v 2010), and in association with positive test results for gonorrhoea or chlamydia. Similar associations with these factors were found for syphilis testing.

CONCLUSIONS

A significant challenge in Aboriginal health is avoiding an increase in the number of HIV infections. One critical intervention in this regard is timely and appropriate testing. Adhering to screening recommendations is clearly an aspect of the delivery of sexual health services to remote communities that can be improved in striving to achieve this aim.

Prevalence of chlamydia, gonorrhoea, syphilis and trichomonas in Aboriginal and Torres Strait Islander Australians: a systematic review and meta-analysis

Higher notification rates of sexually transmissible infections (STIs) are reported among Aboriginal and Torres Strait Islander (Aboriginal) compared with non-Aboriginal people in Australia. The aim of this study is to estimate the pooled prevalence of chlamydia, gonorrhoea, syphilis and trichomonas among Aboriginal people in Australia by sex, age-group, setting (clinic vs population/community-based) and population group [adults, pregnant females, young people (12-29 years) and prisoners]. The databases Medline, PubMed and Web of Science were searched in May 2015. A meta-analysis was conducted to estimate the pooled prevalence of the four STIs in Aboriginal people and if possible, by gender, age-group, setting and population group. A total of 46 studies were included. The pooled prevalence was 11.2% (95%CI: 9.4-13.0%) for chlamydia (36 studies), 12.5% (95%CI: 10.5-14.6%) for gonorrhoea (28 studies), 16.8% (95%CI: 11.0-22.6%) for syphilis (13 studies) and 22.6% (95%CI: 18.5-26.7%) for trichomonas (11 studies); however, there was significant heterogeneity between studies (I(2) <97.5%, P<0.01). In the subgroup analysis, a higher pooled prevalence occurred in females than males for chlamydia (12.7% vs 7.7%) and gonorrhoea (10.7% vs 8.1%). The prevalence of chlamydia was 12.4% in clinic-based compared with 4.3% in population-based studies. The highest pooled prevalence by population group was among pregnant females (16.8%) and young people (16.2%) for chlamydia, pregnant females (25.2%) for trichomonas; and young people for gonorrhoea (11.9%). This review highlights the need to decrease the prevalence of STIs among Aboriginal people through community-based programs that target asymptomatic young people.

Prevalence and Correlates of a Diagnosis of Sexually Transmitted Infection Among Young Aboriginal and Torres Strait Islander People: A National Survey

BACKGROUND

Young Aboriginal and Torres Strait Islander (Aboriginal) people are recognized as a priority population for the control of sexually transmissible infections (STIs) in Australia. This article reports the prevalence of self-reported STI diagnoses and their correlates among Aboriginal people aged 16 to 29 years.

METHODS

Results were analyzed from a survey conducted between 2011 and 2013 at regular community events. Univariate and multivariate logistic regression models were used to identify the correlates of a history of STI diagnosis among participants who reported being sexually active and ever having been tested for STIs. All analyses were stratified by sex.

RESULTS

Of the 2877 participants in this study, 2320, comprising 60% females, self-reported ever having had vaginal or anal sex, and a further subset of 1589 (68%) reported ever being tested for any of the following STIs: chlamydia, gonorrhea, syphilis, or trichomonas. Within this latter group, the proportion who reported that they had had a positive STI diagnosis was 25%. In multivariate analysis, women who reported sexual debut before the age of 16 years (prevalence ratio [PR], 1.53; 95% confidence interval, 1.16-2.81; P < 0.05), ever having had oral sex (PR, 2.66; 1.47-4.82; P < 0.001), inconsistent condom use in the past 12 months (PR, 1.71; 1.13-2.58; P < 0.012), having had sex with someone they had just met (adjusted odds ratio, 1.74; 1.21-2.50; P < 0.003), and using ecstasy (PR, 1.81; 1.16-2.81; P < 0.009) were significantly associated with a self-reported history of an STI diagnosis. For men, being older (25-29 years; PR, 2.10; 1.10-3.96; P < 0.023), being gay or bisexual (PR, 2.22; 1.16-4.27; P < 0.016), not using a condom during last sex, (PR, 1.74; 1.10-2.76; P < 0.019), past ecstasy use (PR, 1.88; 1.11-3.20; P < 0.019), and injecting drug use (PR, 2.81; 1.35-5.88); P < 0.006) were independent predictors of ever reporting being diagnosed as having an STI.

DISCUSSION

In the first community-based survey of this population, a self-reported history of ever being diagnosed as having prevalent STIs was common in sexually active young Aboriginal people who reported STI testing in the past. This population requires targeted education and health service interventions to address the high burden of STIs.

A preliminary evaluation of a new GeneXpert (Gx) molecular point-of-care test for the detection of Trichomonas vaginalis

OBJECTIVES

Global concerns regarding the prevalence, asymptomatic nature and burden of disease associated with Trichomonas vaginalis (TV) continue. The lack of a portable molecular point-of-care assay to detect this infectious disease has meant that many remote or low-resource settings still need to rely on delayed results from central laboratories and/or syndromic management as treatment strategies. We evaluated the new GeneXpert (Gx) TV nucleic acid amplification test (NAAT) compared with an in-house laboratory NAAT to determine whether it would be suitable for use at the point of care.

METHODS

In a state-based laboratory and using their in-house NAAT, we selected the first 60 urine samples that were positive and the first 60 that were negative (n=120) in the study period for Gx TV testing in order to reduce collection delays and avoid the freezing of samples.

RESULTS

Positive percentage agreement between the Gx TV and NAAT was 95.0% (95% CI 86.1% to 99.0%), negative percentage agreement was 100.0% (95% CI 93.5% to 100.0%) and overall percentage agreement was 97.4% (95% CI 92.5% to 99.5%). Three discordant results were detected with each being close to the cycle threshold of detection using the in-house NAAT assay.

CONCLUSIONS

Findings suggest the Gx TV assay is easy to use and has suitable overall agreement for sexually transmissible infection (STI) testing at the point of care. It may be used in combination with the Gx CT/NG assay to test for all three STIs simultaneously using this portable and modular-based NAAT platform.

A sexual health quality improvement program (SHIMMER) triples chlamydia and gonorrhoea testing rates among young people attending Aboriginal primary health care services in Australia

BACKGROUND

In Australia, chlamydia is the most commonly notifiable infection and over the past ten years chlamydia and gonorrhoea notification rates have increased. Aboriginal compared with non-Aboriginal Australians have the highest notifications rates of chlamydia and gonorrhoea. Regular testing of young people for chlamydia and gonorrhoea is a key prevention strategy to identify asymptomatic infections early, provide treatment and safe sex education. This study evaluated if a sexual health quality improvement program (QIP) known as SHIMMER could increase chlamydia and gonorrhoea testing among young people attending four Aboriginal primary health care services in regional areas of New South Wales, Australia.

METHODS

We calculated the proportion of 15-29 year olds tested and tested positivity for chlamydia and gonorrhoea in a 12-month before period (March 2010-February 2011) compared with a 12-month QIP period (March 2012-February 2013). Logistic regression was used to assess the difference in the proportion tested for chlamydia and gonorrhoea between study periods by gender, age group, Aboriginal status and Aboriginal primary health service. Odds ratios (OR) and their 95 % confidence intervals (CIs) were calculated with significance at p < 0.05.

RESULTS

In the before period, 9 % of the 1881 individuals were tested for chlamydia, compared to 22 % of the 2259 individuals in the QIP period (OR): 1.43, 95 % CI: 1.22-1.67). From the before period to the QIP period, increases were observed in females (13 % to 25 %, OR: 1.32, 95 % CI: 1.10-1.59) and males (3 % to 17 %, OR: 1.85, 95 % CI: 1.36-2.52). The highest testing rate in the QIP period was in 15-19 year old females (16 % to 29 %, OR: 1.02, 95 % CI: 0.75-1.37), yet the greatest increase was in 20-24 year olds males (3 % to 19 %, OR: 1.65, 95 % CI: 1.01-2.69). Similar increases were seen in gonorrhoea testing. Overall, there were 70 (11 %) chlamydia diagnoses, increasing from 24 in the before to 46 in the QIP period. Overall, 4 (0.7 %) gonorrhoea tests were positive.

CONCLUSIONS

The QIP used in SHIMMER almost tripled chlamydia and gonorrhoea testing in young people and found more than twice as many chlamydia infections. The QIP could be used by other primary health care centres to increase testing among young people.

Attendance patterns and chlamydia and gonorrhoea testing among young people in Aboriginal primary health centres in New South Wales, Australia

Background To inform a sexual health quality improvement program we examined chlamydia and gonorrhoea testing rates among 15–29 year olds attending Aboriginal Community Controlled Health Services (ACCHS) in New South Wales, Australia, and factors associated with chlamydia and gonorrhoea testing. Methods: From 2009 to 2011, consultation and testing data were extracted from four ACCHS. Over the study period, we calculated the median number of consultations per person and interquartile range (IQR), the proportion attending (overall and annually), the proportion tested for chlamydia and gonorrhoea, and those who tested positive. We examined factors associated with chlamydia and gonorrhoea testing using logistic regression. Results: Overall, 2896 15–29-year-olds attended the ACCHSs, 1223 were male and 1673 were female. The median number of consultations was five (IQR 2–12), four (IQR 1–8) for males and seven (IQR 3–14) for females (P < 0.001). Nineteen percent of males and 32% of females attended in each year of the study (P < 0.001). Overall, 17% were tested for chlamydia (10% of males and 22% of females, P < 0.001), and 7% were tested annually (3% of males and 11% of females, P < 0.001). Findings were similar for gonorrhoea testing. In the study period, 10% tested positive for chlamydia (14% of males and 9% of females, P < 0.001) and 0.6% for gonorrhoea. Factors independently associated with chlamydia testing were being female (adjusted odds ratio (AOR) 2.64, 95% confidence interval (CI) 2.07–3.36), being 20–24 years old (AOR: 1.58, 95% CI: 1.20–2.08), and having >3 consultations (AOR: 16.97, 95% CI: 10.32–27.92). Conclusions: More frequent attendance was strongly associated with being tested for chlamydia and gonorrhoea. To increase testing, ACCHS could develop testing strategies and encourage young people to attend more frequently.