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06:26
Micro-Colony Forming Unit Assay for Efficacy Evaluation of Vaccines Against Tuberculosis
Published on: July 28, 2023
Childhood tuberculosis: old and new vaccines
Gregory Hussey1, Tony Hawkridge, Willem Hanekom
1South African Tuberculosis Vaccine Initiative, University of Cape Town, Anzio Road, Observatory, 7925, South Africa. gregory.hussey@uct.ac.za
Paediatric Respiratory Reviews
|June 19, 2007
Summary
The global tuberculosis (TB) epidemic, worsened by HIV and drug resistance, necessitates new vaccines. While the current Bacille Calmette-Guérin (BCG) vaccine has limitations, promising new TB vaccine candidates are advancing through clinical trials.
Area of Science:
- Immunology
- Infectious Diseases
- Vaccinology
Background:
- The global tuberculosis (TB) epidemic is escalating, particularly in sub-Saharan Africa and South-East Asia.
- This crisis is exacerbated by the human immunodeficiency virus (HIV) pandemic, multidrug-resistant TB (MDR-TB), and extensively drug-resistant TB (XDR-TB).
- The existing Bacille Calmette-Guérin (BCG) vaccine offers limited protection against adult pulmonary TB, despite preventing severe childhood forms.
Purpose of the Study:
- To review the history and variable efficacy of the BCG vaccine.
- To explore the mechanisms of protective immunity against TB.
- To discuss the development, challenges, and future prospects of novel TB vaccine candidates.
Main Methods:
- Literature review of historical TB vaccine development.
- Analysis of factors influencing BCG vaccine efficacy.
- Examination of preclinical and clinical data for new TB vaccine candidates.
Main Results:
- New TB vaccine candidates show promising results in animal models.
- Several candidates have progressed to Phase I human clinical trials.
- Anticipation of Phase III trials commencing by 2009 for advanced candidates.
Conclusions:
- The development of effective new TB vaccines is a critical global health priority.
- An effective new TB vaccine could potentially be licensed by 2015.
- Continued research and clinical trials are essential to combat the evolving TB epidemic.
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