I would bet that 'monkey' would resist such, if capable (I know, don't go there.): 'monkeys' have better taste...
...and may 'taste better': fwiw, my bet is on the bushmeat/butchering connection, which has been postulated as a vector for Marburg and Ebola as well.
I think that theory is probably accurate, considering that sanitation is likely near zero and hand washing is probably zero.