A small outbreak of hepatitis occurred in Oklahoma following contact with newly imported chimpanzees. The infection appears to have been acquired by the chimpanzees in captivity and then transmitted to the final caretakers.
Mosley JW, Reinhardt HP, Hassler FR. Chimpanzee-Associated HepatitisAn Outbreak in Oklahoma. JAMA. 1967;199(10):695–697. doi:10.1001/jama.1967.03120100057009