Tuberculosis (TB) disproportionally affects hard-to-reach populations,, such as the homeless, migrants, refugees, prisoners, substance misuers, people living with HIV. These people face important challenges in accessing and receiving quality health care services. To identify barriers to, and facilitators for, the uptake of TB diagnosis and treatment services by people from those hard-to-reach populations we performed a systematic reviewed of the qualitative literature following PRISMA guidelines, . Twelve studies were included in this review; most focussed on migrants. Views on perceived susceptibility to and severity of TB varied widely and included misconceptions. Stigma and challenges with accessing health care were identified as barriers for TB diagnosis and treatment uptake whereas nurse, family, and friends' support were facilitators to treatment compliance. Addressing barriers and facilitators may improve identification of potential TB cases and treatment in hard-to-reach populations. PROSPERO registration number: CRD420150194503

Tuberculosis is over-represented in hard-to-reach (underserved) populations in high-income countries of low tuberculosis incidence. The mainstay of tuberculosis care is early detection of active tuberculosis (case finding), contact tracing, and treatment completion. We did a systematic review with a scoping component of relevant studies published between 1990 and 2015 to update and extend previous National Institute for Health and Care Excellence (NICE) reviews on the effectiveness of interventions for identifying and managing tuberculosis in hard-to-reach populations. The analyses showed that tuberculosis screening by (mobile) chest radiography improved screening coverage and tuberculosis identification, reduced diagnostic delay, and was cost-effective among several hard-to-reach populations. Sputum culture for pre-migration screening and active referral to a tuberculosis clinic improved identification. Furthermore, monetary incentives improved tuberculosis identification and management among drug users and homeless people. Enhanced case management, good cooperation between services, and directly observed therapy improved treatment outcome and compliance. Strong conclusions cannot be drawn because of the heterogeneity of evidence with regard to study population, methodology, and quality.

ObjectiveTo determine which service models and organisational structures are effective and cost-effective for delivering tuberculosis (TB) services to hard-to-reach populations.DesignEmbase and MEDLINE (1990–2017) were searched in order to update and extend the 2011 systematic review commissioned by National Institute for Health and Care Excellence (NICE), discussing interventions targeting service models and organisational structures for the identification and management of TB in hard-to-reach populations. The NICE and Cochrane Collaboration standards were followed.SettingEuropean Union, European Economic Area, European Union candidate countries and Organisation for Economic Co-operation and Development countries.ParticipantsHard-to-reach populations, including migrants, homeless people, drug users, prisoners, sex workers, people living with HIV and children within vulnerable and hard-to-reach populations.Primary and secondary outcome measuresEffectiveness and cost-effectiveness of the interventions.ResultsFrom the 19 720 citations found, five new studies were identified, in addition to the six discussed in the NICE review. Community health workers from the same migrant community, street teams and peers improved TB screening uptake by providing health education, promoting TB screening and organising contact tracing. Mobile TB clinics, specialised TB clinics and improved cooperation between healthcare services can be effective at identifying and treating active TB cases and are likely to be cost-effective. No difference in treatment outcome was detected when directly observed therapy was delivered at a health clinic or at a convenient location in the community.ConclusionsAlthough evidence is limited due to the lack of high-quality studies, interventions using peers and community health workers, mobile TB services, specialised TB clinics and improved cooperation between health services can be effective to control TB in hard-to-reach populations. Future studies should evaluate the (cost-)effectiveness of interventions on TB identification and management in hard-to-reach populations and countries should be urged to publish the outcomes of their TB control systems.PROSPERO registration numberCRD42015017865.