Female beewolves cultivate the useful bugs in specialised antennal gland reservoirs and apply them to the ceilings of brood cells, said the scientists. The wasp larvae, growing in the cells, later take up the bacteria and transfer them to the outside surfaces of their cocoons.
Laboratory tests showed that the beewolves employed an advanced form of "combination medication" using nine antibiotic varieties.
Johannes Kroiss, from the Max Planck Institute for Chemical Ecology in Jena, said: 'A combined treatment with streptochlorin and eight different piericidines we were able to isolate from the cocoon helps to fend off a very broad spectrum of micro-organisms.
Not only do the wasps use a combination of broad-spectrum antibiotics, they've been doing it for millions of years. Link -via the Presurfer