Peranan Sel Sistem Imun Alamiah Pada Infeksi Mycobacterium tuberculosis

Mycobacterium tuberculosis infection which causes tuberculosis is still a major health problem worldwide due to high morbidity and mortality, where in 2018 tuberculosis caused 1.5 million deaths. The degree of pulmonary tuberculosis varies from mild infiltration, chronic infection, cavity formation to severe and destructive tuberculosis. The difference in the degree of pulmonary tuberculosis is influenced by the response of the immune system to M. tuberculosis. When M. tuberculosis infects the lungs, the human immune system will carry out a series of processes to limit the spread and replication of bacteria. The immune system against M. tuberculosis consists of an innate immune system involving cellular components such as macrophages, neutrophils, Natural Killer (NK cells), dendritic cells and upper respiratory epithelium and an acquired immune response which is mainly mediated by T lymphocyte cells of host that is responsible for recognizing and controlling invasion by pathogens. This review will describe the role of natural immune system cells in M. tuberculosis infection. In addition, a complete description of M. tuberculosis infection will also be discussed to increase understanding of the role of natural immune system cells in M. tuberculosis infection.