Although it's not specified in common dictionary definitions... "...zoonosis (a disease communicable from animals to man under natural conditions)." —Laurie Ga

Although it's not specified in common dictionary definitions... "...zoonosis (a disease communicable from animals to man under natural conditions)." —Laurie Garrett, _The Coming Plague_ (Ch 14, section IV) Which is naturally how the word is used virtually all the time. Transmission from lab animals kept for study in a biolab, you could argue either way. Transmission from humanized lab animals purposely subjected to serial passage is not really zoonosis in any reasonable sense.