Organisms Posing High Risks
(During the First 75 Years of The 20th Century)
Brucellosis (Brucella)
n  > 6000 cases through out the U.S. in 1947
Q fever (Rickettsiae)
Typhoid fever (Salmonella)
n  almost 6000 cases U.S.-wide in 1942
Viral hepatitis (all types)
Tuberculosis (Mycobacteria)