Salmonella-tainted cantaloupe is killing Canadians. How scientists track the outbreak

When an outbreak like this happens, food inspectors race to track down the culprit. In the case of the contaminated cantaloupe, they were able to trace the salmonella back to produce from a few specific companies by checking invoices from Mexico, the U.S. and Canada. 

from CBC | Health News https://ift.tt/QBimq5V