Avoiding antibiotic resistance for 50 million years -- a pathogenic fungus, Escovopsis (upper right) attacks the fungal garden of leafcutter ants. Remarkably some leafcutters carry on their bodies a living bacterial colony (white patches on ant held in forceps, right) which produces an antibiotic that controls the growth of the pathogen (research of Cameron Currie, University of Kansas). An evolutionary "arms race" keeps the antibiotic effective.
© Gregory G. and Mary Beth Dimijian