title: FURTHER OBSERVATIONS ON THE EPIDEMIOLOGY OF LEPTOSPIROSIS IN IOWA. 1. CASES OCCURRING AMONG ABATTOIR EMPLOYEES.
mesh_terms: D000003:Abattoirs; D000371:Agglutination; D000818:Animals; D002417:Cattle; D004813:Epidemiology; D007484:Iowa; D007922:Leptospirosis; D009784:Occupational Diseases; D012698:Serologic Tests; D013552:Swine; D015047:Zoonoses
keywords: ABATTOIRS; AGGLUTINATION; CATTLE; EPIDEMIOLOGY; IOWA; LEPTOSPIROSIS; OCCUPATIONAL DISEASES; SERODIAGNOSIS; SWINE; ZOONOSES