From the earliest days of microscopy, scientists have been describing those parameters that indicate viability of microorganisms. In the late 1600’s, van Leeuwenhoek indicated that cells were viable based upon the motility of... read more

PDA Technical Report Number 33 (TR33), Evaluation, Validation and Implementation of New Microbiological Testing Methods, was originally published in 2000 and was the first guidance document for how to select, validate and ... read more