Further Observations on the Relationships between Gram-Negative Rods and Staphylococci Grown in the Presence of Penicillin

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Abstract
SUMMARY: It has not been found possible to repeat the work of Briggs et al. (1957) in which Gram-negative rods were isolated from cultures of staphylococci treated with penicillin, and staphylococci were subsequently recovered from cultures of these rods when the latter were grown in the absensce of penicillin. No flaw in technique has been revealed which would enable the earlier results to be readily explained in terms of contamination.