Nontuberculous mycobacterial lung disease.

Area of Science:

• Pulmonary Medicine
• Infectious Diseases
• Microbiology

Background:

• Nontuberculous mycobacteria (NTM) lung diseases are increasingly prevalent, representing a significant public health threat.
• Understanding the factors contributing to NTM disease development and treatment outcomes is crucial.

Purpose of the Study:

• To review the current understanding of nontuberculous mycobacteria lung disease, focusing on prevalence, patient demographics, and therapeutic challenges.
• To highlight recent findings regarding NTM disease pathogenesis and antimicrobial resistance.

Main Methods:

• Literature review of recent studies on NTM lung disease.
• Analysis of patient characteristics, radiographic findings, and treatment outcomes.
• Examination of molecular mechanisms of antimicrobial resistance in NTM.

Main Results:

• NTM lung disease with nodules and bronchiectasis predominantly affects women with a specific morphotype (low BMI, tall stature, scoliosis, pectus excavatum, mitral valve prolapse).
• Tumor necrosis factor alpha (TNF-alpha) blockers increase susceptibility to severe NTM infections.
• A poor correlation exists between in-vitro antibiotic susceptibility and in-vivo treatment response, potentially due to inducible macrolide resistance (erm) genes in some NTM species.

Conclusions:

• NTM infections present increasing clinical challenges with significant treatment obstacles.
• Further research into NTM pathogenesis and novel therapeutic strategies is essential to improve patient outcomes.