AI Article Synopsis
- Tuberculosis (TB) is a major global health issue, causing significant mortality, and the BCG vaccine has been used for over a century to prevent it, though its effectiveness varies.
- This research aims to systematically review the impact of BCG revaccination on TB protection, particularly after a recent trial in South Africa showing promising results in adolescents.
- The review will utilize multiple databases to gather studies, and findings will be shared publicly without requiring formal ethical approval, aiming for wide dissemination through journals and conferences.
Article Abstract
Introduction: Tuberculosis (TB) is a disease caused by (M.TB) and other species of the Mycobacterium tuberculosis complex. Globally, TB is ranked as the ninth leading cause of death and the leading cause of death from a single infectious agent. The bacille Calmette-Guerin (BCG) vaccine has been used globally since 1921 for the prevention of TB in humans, and was derived from an attenuated strain of . Evidence from previous randomised trials show that the efficacy of primary BCG vaccination against pulmonary TB ranged from no protection to very high protection. In addition, some studies suggest a benefit of BCG revaccination. For example, a recent trial conducted in South Africa showed that BCG revaccination of adolescents could reduce the risk of TB infection by half. However, we are not aware of any recent systematic reviews of the effects of BCG revaccination. Thus, the need for this systematic review of the effects of BCG revaccination on protection against TB infection and disease.
Method And Analysis: We will search PubMed, the Cochrane Central Register of Controlled Trials, EMBASE, WHO International Clinical Trials Registry Platform and reference lists of relevant publications for potentially eligible studies. We will screen search outputs, select eligible studies, extract data and assess risk of bias in duplicate. Discrepancies will be resolved by discussion and consensus or arbitration. We will use the Grading of Recommendations Assessment, Development and Evaluation method to assess the certainty of the evidence. The planned systematic review was registered with the International Prospective Register of Systematic Reviews (PROSPERO) in August 2018.
Ethics And Dissemination: Publicly available data will be used, hence no formal ethical approval will be required for this review. The findings of the review will be disseminated through conference presentations and publication in an open-access peer-reviewed journal.
Prospero Registration Number: CRD42018105916.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6797475 | PMC |
| http://dx.doi.org/10.1136/bmjopen-2018-027033 | DOI Listing |
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