Legionella is a type of bacteria that can cause a severe form of pneumonia known as Legionnaires' disease. This infectious disease is typically contracted by inhaling mist or water droplets contaminated with Legionella bacteria. Research in this area focuses on understanding the ecology, transmission, and pathogenesis of Legionella, as well as developing effective prevention and control strategies. This includes studying factors such as environmental reservoirs, biofilm formation, genetic diversity of the bacteria, and host immune response. Additionally, research seeks to improve diagnostic tools and treatment options for Legionnaires' disease.