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Semin Respir Crit Care Med 2020; 41(04): 592-604
DOI: 10.1055/s-0040-1710583
Review Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

The Great Masquerader: Tuberculosis Presenting as Community-Acquired Pneumonia

Keertan Dheda
1   Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute & South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town, Cape Town, South Africa
2   Department of Immunology and Infection, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
,
Edson Makambwa
1   Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute & South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town, Cape Town, South Africa
,
Aliasgar Esmail
1   Centre for Lung Infection and Immunity, Division of Pulmonology, Department of Medicine and UCT Lung Institute & South African MRC/UCT Centre for the Study of Antimicrobial Resistance, University of Cape Town, Cape Town, South Africa
› Author Affiliations
Further Information

Publication History

Publication Date:
21 June 2020 (online)

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Abstract

According to World Health Organization estimates, tuberculosis (TB) and lower respiratory tract infections (LRTIs) are both among the top 10 global causes of death. TB and community-acquired pneumonia (CAP), if mortality estimates are combined, would rank as the third most common cause of death globally. It is estimated that each year there are approximately 10 million new cases of TB that are associated with approximately 1.2 million deaths, and almost 450 million new episodes of LRTI (synonymous with CAP) with approximately 4 million associated deaths. Globally, Streptococcus pneumoniae remains the most common cause of CAP. However, although well documented, it is not widely appreciated that in several parts of the world, including sub-Saharan Africa, Asia, and South America, Mycobacterium tuberculosis is an important cause of CAP, if not the most common organism isolated in such settings. Thus, CAP due to M. tuberculosis is not uncommon in some parts of the world with up to a third of cases being attributable to M. tuberculosis. Consequently, TB remains an important clinical entity in the intensive care unit in these settings. Despite its frequency and importance, there are very limited data about TB CAP. In this review we discussed the epidemiology, immunopathogenesis, clinical presentation, diagnosis, management, prognosis, and prevention of TB CAP. The utility of newer diagnostic approaches is highlighted.

Keywords

tuberculosis - community-acquired pneumonia - lower respiratory tract infection - intensive care unit - critically ill
 

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