title: Epidemiologic aspects of legionellosis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000453:epidemiology; D005260:Female; D006168:Guinea Pigs; D006801:Humans; D007223:Infant; D007877:Legionnaires' Disease / Q000150:complications / Q000453:epidemiology* / Q000382:microbiology / Q000635:transmission; D008297:Male; D008875:Middle Aged; D011014:Pneumonia / Q000209:etiology; D014481:United States