Clinical Characteristics and Immune Escape Mechanism of Nontuberculous Mycobacterial Lung Disease in South China

Nontuberculous Mycobacterial lung disease (NTM-LD) is a significant infectious challenge. The precise causes remain unclear, diagnosis can be complex, treatment outcomes are often unsatisfactory, and the disease can severely affect a patient's quality of life. Environmental factors, such as the warm and humid climate in South China, may contribute to unique characteristics of NTM in this region, but systematic research is currently lacking. This study aims to improve the understanding of NTM-LD in South China. It consists of two complementary parts: 1. The first part is a retrospective review of medical records from approximately 1,500 NTM patients across multiple hospitals in South China. This analysis seeks to identify common patterns in symptoms, diagnostic findings, and treatment responses within this population. 2. The second part is a prospective study involving about 106 current NTM-LD patients. Blood and lung fluid samples will be collected to analyze, using advanced laboratory techniques, how the patient's immune system responds to the infection. This investigation aims to uncover clues about why some cases are difficult to treat. The overall goal of this research is to generate evidence that can aid healthcare providers in South China in diagnosing and managing NTM-LD more effectively. Please note that this is an observational study; no new drugs or experimental treatments are being tested.