"These antibiotics are produced by actinomycete bacteria that live on the ants in a mutual symbiosis.
"Although these ants have been studied for more than 100 years this
is the first demonstration that a single ant colony uses multiple
antibiotics and is reminiscent of the use of multidrug therapy to treat
infections in humans.
"…Dr Hutchings' research investigates the Acromyrmex octospinosus leaf cutter ant, endemic in South and Central America and the southern US." (EurekAlert! 2010)