A Rapid Method for the Turbidimetric Assay of Antibiotics

Abstract

Summary: By using a culture of Streptococcus agalactiae in its logarithmic phase of growth as test organism, it is possible to assay nisin satisfactorily with an incubation period of approximately half an hour. Penicillin, streptomycin, aureomycin and gramicidin cause a qualitatively similar response in the test organism. A similar technique could therefore be used to assay these antibiotics.