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 transmission contamination risk assessment environmental reservoir prevention control testing monitoring regulations guidelines remediation management cooling towers water air conditioning heaters plumbing biofilm formation colonization sampling culture pcr detection diagnostics serogroups virulence factors egionella epidemiology outbreaks symptoms antibiotics measures public health surveillance quality awareness education pneumophilia causing legionnaires' medically gram-negative bacterium pneumonia aquatic environments contaminating transmitted humans inhalation aerosolized droplets leading infections