Assessing the quality of tuberculosis care using routine surveillance data: a process evaluation employing the Zero TB Indicator Framework in Mongolia.

Objectives: To evaluate the feasibility of the Zero TB Indicator Framework as a tool for assessing the quality of tuberculosis (TB) case-finding, treatment and prevention services in Mongolia.

Setting: Primary health centres, TB dispensaries, and surrounding communities in four districts of Mongolia.

Design: Three retrospective cross-sectional cohort studies, and two longitudinal studies each individually nested in one of the cohort studies.

Vitamin D Supplements for Prevention of Tuberculosis Infection and Disease.

Background: Vitamin D metabolites support innate immune responses to . Data from phase 3, randomized, controlled trials of vitamin D supplementation to prevent tuberculosis infection are lacking.

Methods: We randomly assigned children who had negative results for infection according to the QuantiFERON-TB Gold In-Tube assay (QFT) to receive a weekly oral dose of either 14,000 IU of vitamin D or placebo for 3 years.