Several workers have reported that benzimidazole is an antagonist of purine compounds. Woolley3 observed that benzimidazole inhibited the growth of several yeasts and bacteria and that the inhibition could be completely removed by the addition of aminopurines. Klotz and Mellody4 demonstrated that yeast nucleic acid reversed the inhibitory effect of benzimidazole on the growth of the bacterium, Escherichiacoli. Gillespie, et al., j showed ...