title: Outbreak of histoplasmosis associated with the 1970 Earth Day activities.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D000818:Animals; D001717:Birds; D003168:Complement Fixation Tests; D004197:Disease Reservoirs; D004812:Epidemiologic Methods; D005243:Feces / Q000382:microbiology*; D005260:Female; D006660:Histoplasmosis / Q000175:diagnosis / Q000453:epidemiology*; D006801:Humans; D008297:Male; D009820:Ohio; D012572:School Health Services; D012737:Sex Factors; D012882:Skin Tests; D014691:Ventilation