Scientists found the existence of TB in the Homo Erectus bones un-earthed in Turkey. This indicates that in the travels to Africa, TB may very well have been what cuased the massive deaths amongst the transient tribes that headed for the new land.
Article courtesy of The New York Times
http://www.nytimes.com/2007/12/18/science/18skul.html?_r=1&ref=science&oref=slogin
Article courtesy of The New York Times
http://www.nytimes.com/2007/12/18/science/18skul.html?_r=1&ref=science&oref=slogin