The overarching purpose of the proposed research is to demonstrate that a targeted, multi-component community-based intervention among PWID in Hai Phong will decrease TB prevalence among this very high-risk population.
Vietnam has a strong National TB Program (NTP), but it belongs to the 20 countries with the highest TB burden in the world. A TB prevalence study among people who inject drugs (PWID) was conducted as part of the Drug use \& Infections in ViEtnam (DRIVE) program, in collaboration with a local screening initiative (Zero TB Vietnam, national TB program - NTP) in 2018 in Hai Phong. While the annual TB rate in the general population of Vietnam is 0.13%, this study found an alarming prevalence of confirmed TB cases from 1.8% to 5.6% among PWID. Some populations, such as people who inject drugs (PWID), combine a very high risk of TB and low access to TB care. Based on the investigators experience in operational research among PWID and their expertise in TB, they designed an intervention to end TB among a highly vulnerable population such as PWID, through significant community involvement. They hypothesize that a targeted, multi-component community-based intervention among PWID in Hai Phong will decrease TB prevalence among this very high-risk population. The DRIVE-TB intervention will use four repeated large-scale randomized driven sampling surveys (RDSS) to identify TB-infected PWID in the community. During RDSS 1 and 4 all participants will undergo a questionnaire on TB symptoms, and have CRP, chest X-ray, and sputum collection for Xpert MTB-RIF®. In RDSS 2 and 3, participants will be screened through the best screening algorithm (elaborated in RDSS1). Participants from all RDSS will also be screened for LTBI through Tuberculin Skin Test (TST). Moreover the 3HP ancillary study, a therapeutic cohort will assess the acceptability, safety, adherence, and cost of a 12-dose once-weekly regimen of isoniazid/rifapentine (3HP) to prevent TB disease among RDSS 2 participants with a positive QuantiFERON test result will be assessed.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
SCREENING
Masking
NONE
Enrollment
4,000
* 3 bi-annual RDSS (RDSS1, 2 and 3), for TB screening * A PWID-specific Information and communication (I\&C) TB module to improve PWID awareness about TB, * Peer group support to facilitate TB treatment initiation and retention, * Implementation of a peer support contact tracing and screening for active TB in contacts.
Hai Phong University of Medecine and Pharmacy
Haiphong, Vietnam
RECRUITINGViettiep 2 Hospital
Haiphong, Vietnam
RECRUITINGPrevalence of confirmed TB cases at RDSS 1 and RDSS 4
Time frame: 2 years between RDSS 1 and 4
Assess TB awareness
Appropriate answers to a set of questions on the knowledge of TB encompassing 3 domains (symptoms, mode of transmission, treatment), at RDSS1 and RDSS4.
Time frame: 2 years
The feasibility and efficacy of the TB mass screening
will be evaluated by the proportion of eligible RDSS participants (i.e. meeting the inclusion criteria) who consent to participate after information. The efficacy of the mass screening, defined by the proportion of those actually tested among the RDSS participants.
Time frame: Through study completion, an average of 2 years
Proportion of confirmed TB cases who have initiated TB treatment among those who have attended the referral TB center for confirmation in RDSS 1, 2, 3.
Time frame: Up to one year
Prevalence of active TB and LTBI among PWID contacts
Time frame: 1 year
The incidence of active TB and LTBI among PWID contacts at 6 and 12 months.
Time frame: 2 years
The proportion of PWID contacts actually screened for TB at the community study site.
Time frame: 1 year
The incidence of TB infection (LTBI and active TB) among PWID in Hai Phong
Time frame: 2 years
HIV viremia prevalence at RDSS1
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defined by the ratio of PWID with HIV viral load \>1000 copies/mL among all PWID, whatever their HIV status
Time frame: At baseline
Incremental cost-effectiveness ratio (ICER) and cost per DALY averted.
Time frame: At baseline
Acceptability of the 3HP regimen,
Defined by both the proportion of RDSS2 participants who accept to participate in the LTBI study after information, and by those who initiated a isoniazid/rifapentine (3HP) among those eligible (i.e. with a positive QuantiFERON test result).
Time frame: 3 months after inclusion in RDSS2
Safety of the 3HP regimen,
Defined by the rate of patients with grade ≥2 adverse events, potentially related to the 3HP regimen, including craving symptoms.
Time frame: 3 months after inclusion in RDSS2
Proportion of participants who have completed a 12-dose once-weekly regimen of isoniazid/rifapentine (3HP) among those who have initiated 3HP.
Time frame: 3 months after inclusion in RDSS2