Printer Friendly

Skeletons harbor ancient evidence for tuberculosis: DNA shows disease arose before cattle domestication.

TB or not TB? That was the question created by two human skeletons excavated more than a decade ago at a 9,000-year-old village submerged off Israel's coast.

Bone damage apparently produced by some infection created the Shakespearean dilemma that puzzled anthropologist Israel Hershkovitz of Tel Aviv University.

Thanks to a genetic analysis of the skeletons directed by Helen Donoghue and Mark Spigelman, both of University College London, Hershkovitz now knows that his team unearthed the earliest known cases of human tuberculosis. A roughly 25-year-old mother had apparently passed the bacterial infection on to her 1-year-old child, after which they both died and were buried together.


Examination of DNA from the skeletons supports the idea, based on earlier studies, that bovine tuberculosis evolved after human tuberculosis did, Hershkovitz and colleagues conclude in a report published online October 15 in PLoS ONE.

Work at the village of Atlit-Yam, which has been covered by water for thousands of years, yielded skeletons and some of the oldest evidence for farming and cattle domestication.

Infection-related bone damage is difficult to pin on any specific disease, notes biological anthropologist George Armelagos of Emory University in Atlanta. "The genetic analysis of the Atlit-Yam skeletons really opens up our understanding of the human form of tuberculosis by showing that it was not derived from cattle but evolved well before animal domestication," Armelagos says.

One hypothesis holds that tuberculosis initially infected people who drank milk from domesticated cattle carrying a unique strain of the bacterium. The Atilt-Yam data "give us the best evidence yet that in a community with domesticated animals but before dairying, the infecting strain of tuberculosis was actually the human pathogen," Donoghue says.

COPYRIGHT 2008 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2008 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:Humans
Author:Bower, Bruce
Publication:Science News
Article Type:Brief article
Geographic Code:7ISRA
Date:Nov 8, 2008
Previous Article:The numbers rarely add up for girls: culture may turn potentially high achievers away from math.
Next Article:Rumors shaped veterans' view of Gulf War ills: syndrome was defined by informal communication.

Terms of use | Privacy policy | Copyright © 2022 Farlex, Inc. | Feedback | For webmasters |