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Resistance assays using Pseudonocardia strains show that both phylotypes have antibacterial activity. 1–5 are Streptomyces strains isolated originally from either soil or ant associated sources. 6–10 are unicellular bacteria isolated from ant associated sources. Streptomyces are undisturbed in growth on lawns of Pseudonocardia Ae707_Ps1 and Ae717_Ps2 relative to the blank control, but unicellular bacteria show suppression.
