Microbiological assay for estimating salivary concentrations of the cariostatic antibiotic Actinobolin

A logarithmic-ratio microbiological assay has been developed for the estimation of concentrations of actinobolin (or inhibitory equivalents) in human saliva. The utility of this assay has been demonstrated by presenting data that show concentrations of this antibiotic (or inhibitory equivalents) detected in saliva or saline after incubation at 37 C for periods as long as 6 hr. The results of some statistical analyses of the assay data have been included.