Sensitivity of Pseudomonas Strains to Polyphosphates in Media Systems

摘要

ABSTRACTOf 13 gram positive and 12 gram negative microorganisms studied in nutrient broth (NB) containing 0.5 sodium salts of three polyphosphates, inhibition showed in seven strains of the former and only three of the latter. In an examination of sixteenPseudomonasstrains in NB, brain heart infusion (BHI) and trypticase soy broth (TSB) at 25°C and pH 7.0, tripoly‐ and hexametaphosphate were more effective inhibitors than pyrophosphate; the degree of inhibition was strain‐dependent. Antibacterial activities were highest in the low‐protein low‐mineral media and were more pronounced when the compounds were filter‐sterilized rather than heat