Q fever among slaughterhouse workers--California.
D000003:Abattoirs; D002140:California; D003168:Complement Fixation Tests; D004196:Disease Outbreaks; D005455:Fluorescent Antibody Technique; D006801:Humans; D009784:Occupational Diseases / Q000453:epidemiology*; D011778:Q Fever / Q000453:epidemiology*