Pronunciation: chik mar'tin
Definition: a method of testing the in vitro efficiency of a bactericidal agent; a standard culture of Salmonella typhi, added to a fixed amount of sterilized feces or yeast, is tested for a fixed period (30 minutes) against various concentrations of phenol solution and various concentrations of the bacteriocide; the result is expressed as the phenol coefficient, the highest dilution of the bacteriocide that kills bacteria, divided by the highest dilution of phenol that sterilizes the solution, within the measured time.
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Examples: glitazone, GI cocktail, etc.