Some INFORMED scholars have submitted a more inclusive hypothesis on the history of Syphilis..
The Origins of Syphilis:
http://www.archaeology.org/9701/newsbriefs/syphilis.html
Huh? Did you read the article you linked to?
“Syphilis, it seems, developed in the New World from yaws, perhaps 1,600 years ago, and was waiting for Columbus and his crew.”