korea
They first discovered MAP in their herds in 1967,with a possible long incubation period from infection to IBD.
It would be interesting to find other countries with a known MAP timeline and IBD incidence. Oh and by the way I spent a year in Korea 1971-1972,UC 1980,
but I moved to my new house in 1979,about a 1/4 mile from a working dairy farm.
Old Mike http://www.ncbi.nlm.nih.gov/pubmed/22749233