The L. boulardi wasp is sometimes infected by a virus called LbFV (L.boulardi filamentous virus). And just as the wasp takes over the body of its maggot target, so does the virus commandeers the body of the wasp. It changes her behaviour so that she no longer cares if a maggot is already occupied. She will implant her eggs, even if her target has an existing tenant. After infected wasps are finished, a poor maggot might have up to eleven eggs inside it.
Via Sakis Koukouvis