It is estimated that one in three people living with HIV remain undiagnosed, so that new strategies and models of HIV testing are urgently needed to reach undiagnosed populations and help them enroll in antiretroviral therapy (ART).
This was stressed by an evaluation study published in PLOS ONE, which noted that HIV testing by lay providers can serve as a critical addition to efforts to achieve the United Nations’ 90-90-90 global HIV targets by 2020 and help to cover the “last mile” of HIV services to at-risk populations.
The evaluation study was done in Vietnam by PATH, in partnership with the Vietnam Ministry of Health, the United States Agency for International Development (USAID), and the Center for Creative Initiatives in Health and Population in Hanoi. It found that community-based HIV testing is “an effective approach to reach people at risk of HIV who have never been tested or test infrequently.”
Key at-risk populations include people who inject drugs, men who have sex with men, female sex workers, and first-time HIV testers.
A cross-sectional survey of 1,230 individuals tested by lay providers found that 74% of clients belonged to at-risk populations, 67% were first-time HIV testers, and 85% preferred lay provider testing to facility-based testing. Also, lay provider testing yielded a higher HIV positivity rate compared to facility-based testing and resulted in a high ART initiation rate of 91%.
According to Dr. Kimberly Green, PATH HIV & TB director, “innovation in HIV testing is absolutely critical to meet (the 90-90-90) ambitious targets, and community-based HIV testing offers a promising solution to connect undiagnosed people with the services they need.”
Lay providers participating in this study belonged to community-based organizations led by at-risk populations in urban areas and to village health worker networks in rural mountainous areas. Providers used a single rapid diagnostic test in clients’ homes, at the offices of community-based organizations, or at any private place preferred by the client. This approach helped to overcome barriers that had prevented key populations from seeking facility-based testing services, such as a perceived lack of confidentiality, fear of stigma and discrimination, inconvenient service opening times and distance, and long waiting times for test results.
Clients who had an HIV-reactive test were referred to the nearest health facility for HIV confirmatory testing, and those who received a confirmed HIV-positive result were referred to a public or private clinic for enrollment in ART. Clients with non-reactive test results received counseling to re-test after three or six months and were referred to a local health facility for HIV prevention services.
The study stresses the effectiveness of HIV testing administered by non-health care workers representing key populations and frontline village health volunteers. The results also support findings from community-based HIV testing approaches in other regions, including sub-Saharan Africa, that have demonstrated comparatively high rates of HIV testing uptake, high HIV positivity yields, and high success rates in linking people to care.