This is straight out of an email from the AOA (the one current DO students get daily):
"Currently, approximately 45 countries accept US-trained DOs for full physician licensure, and many others grant limited licensure. Log in to DO-Online and click on State Government, then Licensure, to read our summary of licensure requirements in countries around the world. If you wish to investigate licensure possibilities in a country not listed in the summary or would like to have more information regarding one of the listed countries, please contact the AOA Division of State Government & International Affairs at (800) 621-1773 ext. 8196."