http://www.newsweek.com/salmonella-medieval-skeleton-unlocks-ancient-history-potentially-deadly-1042007

Researchers have found the oldest evidence of salmonella in human remains from Europe in the ancient skeleton of a woman from Norway.

The discovery changes scientists’ understanding of this fiendish family of bacteria. The domestication of pigs, the authors wrote in the journal Current Biology, might be linked to the spread of certain types of salmonella in humans.