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Antibacterial Interaction between Bromthymol Blue and Polymyxin B

Abstract

POLYMYXIN B and bromthymol blue have been used in various selective and differential bacteriological media1–3. In the course of recent investigations of various experimental selective media for use in the enumeration and isolation of staphylococci from foods, it was noticed that Staphylococcus aureus and Bacillus subtilis grew on the surface of plates poured with polymyxin B media containing bromcresol purple and phenol red, but did not grow, or grew poorly, on plates of polymyxin B media containing bromthymol blue.

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CRISLEY, F. Antibacterial Interaction between Bromthymol Blue and Polymyxin B. Nature 203, 211–213 (1964). https://doi.org/10.1038/203211b0

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