legionella pneumophilia bacteria in water, causing legionnaires' disease, medically 3d , generative ai

legionella pneumophila bacterial infection legionnaires 039 disease legionellosis waterborne pathogen gramnegative bacteria intracellular respiratory illness pneumonia outbreak transmission contamination risk assessment environmental reservoir prevention control testing monitoring management cooling hot water systems air conditioning heaters biofilm formation colonization sampling culture pcr detection diagnostics serogroups virulence factors egionella epidemiology symptoms treatment antibiotics measures public health surveillance education pneumophilia legionnaires' medically gram-negative bacterium responsible severe pneumonia aquatic environments contaminating transmitted humans inhalation aerosolized droplets leading infections